ASME Community - Swiss Section News · 2015. 6. 1. · ASME Swiss Section Newsletter #11 Page No 2 May 2015 Now in its 60th year, ASME Turbo Expo is recognized as the must-attend

ASME Swiss Section Newsletter #11 Page No 1 May 2015

Swiss Section

News

Newsletter Published – 11 May 2015

Inside this Issue

1 Highlights from The Swiss Section

3 Giessbach event and General Assembly of

the ASME Swiss Section

4 Invitation to the 20th Blade Mechanics

Seminar and Exhibition in Winterthur

6 The Flying Engineer

12

13

Call for 2015 ASME Swiss Section Young

Engineer Award

ASME France Section invitation to 14th

EDF – Pprime Workshop

14 TECH in BRIEF: Experimental evaluation

of local heat transfer distributions in high

crossflow narrow impingement channels

using the transient liquid crystal technique

17 ASME Training & Development courses for

2015 in Europe

Highlights from The Swiss Section

by Gregory Hespe, News Editor

Preparation for the Giessbachbahn as an ASME Historical

Engineering Landmark is in full swing with 27th August set for the

official ceremony at the Giessbach Hotel. A number of senior

ASME representatives will be present and all ASME Swiss Section

members, member’s family as well as non-members of ASME are

invited to attend the ceremony.

The official ceremony will be followed by a small stand-up lunch,

rides on the Giessbachbahn. At 3pm, the general assembly of the

ASME Swiss Section will take place.

For full details, which include how to register for the event and

transport arrangements, please have a read the article, Giessbach

event and General Assembly of the ASME Swiss Section on page

3.

An interesting article that is slightly different style to our usual

newsletter articles is located on page 6; it is Geoff Engelbrecht’s

lifelong interest of flying and its influences it has had on his

engineering career.

We have the position for Communication & Web open within the

ASME Swiss Section which has the responsibility of maintaining

our ASMEone website. If you are interested please contact one

of the leadership team. Additionally, we are looking new

candidates for the leadership team of the ASME Swiss Section for

the election planned in September 2015. Please send your

interest to Dr Daniel Kearney and Dr Hans Wettstein by July 30th

.

The one-day 20th

Blade Mechanics Seminar and Exhibition will be

held in Winterthur on September 8th

. Inside the Newsletter, the

highlights of this engineering event are given and a link for

registration.

Hope to see you all at the General Assembly in Gissbach on

August 27th

.

Gregory Hespe

ASME Leadership Team of the Swiss Section

• Chair: Jaroslaw SZWEDOWICZ,

[email protected]

• Vice-Chair: Wolfgang KAPPIS, [email protected]

• Secretary: Said HAVAKECHIAN,

[email protected]

• Treasurer: Geoffrey Engelbrecht, [email protected]

• News Editor: Gregory HESPE, [email protected]

• Communication & Web: Open Position

• Members Interest: Armin ZEMP, [email protected]

• Past Chair: Andre BURDET, [email protected]

• College Relations: Daniel KEARNEY, [email protected]

• Honors & Awards: Daniel KEARNEY, [email protected]

• History & Heritage: Hans WETTSTEIN, [email protected]

Please send us your feedback.

The 2014-2015 Membership year started on October 1, and there are

still a few loyal ASME Members who have not yet renewed their

membership. If you haven't already done so, please take a moment to

go to https://shop.asme.org/ and complete your renewal so that you

continue to receive all the great benefits we chat about each month

here in Member Savvy. Thanks.


Now in its 60th year, ASME Turbo Expo is recognized as the must-attend event for turbomachinery professionals.

The technical conference has a well-earned reputation for bringing together the best and brightest experts from

around the world to share the latest in turbine technology, research, development, and application in the

following topic areas: gas turbines, steam turbines, wind turbines, fans & blowers, Rankine cycle, and supercritical

CO2. Turbo Expo offers unrivalled networking opportunities with a dedicated and diverse trade show floor. The 3-

day exhibition attracts the industry's leading professionals and key decision makers, whose innovation and

expertise are helping to shape the future of the turbomachinery industry and will feature a Student Poster

Session.

Plan now to join 3,000 turbine colleagues from around the world at ASME TURBO EXPO, ASME's premier turbine

technical conference and exposition, set for June 15-19, 2015 at the Palais de Congrès in Montréal, Canada.


Giessbach event and General Assembly of the ASME Swiss

Section

By Dr Hans Wettstein

On August 27th we will celebrate the forth Landmark of Mechanical Engineering in Switzerland. The artefact of

merit is the world’s first funicular to employ a single, two-rail track along its entire length, with a short passing

track for the two cars to meet at mid-point. The Giessbachbahn is still in scheduled operation. This invention,

known as Abt switch, has been employed in more than thousand later installations without any change of the

principle with the latest newly built installation in 2013 and others under planning.

The owner of the Giessbachbahn is the well-known Hotel with the same name. Our members are invited to

attend the ceremony followed by a general assembly of the ASME Swiss Section.

The preliminary agenda looks as listed below.

We expect as guests the officials from the ASME Historical Heritage Committee and probably the president, Julio

Guerrero. Another VIP we hope that will attend is Vera Weber. She is well known in Swiss politics and will be

representing her father Franz Weber who in 1982 saved both the Hotel Giessbach and the funicular from being

demolished and replaced by apartment blocks.

11:00 Welcome address

11:15 Official ceremony with unveiling the official Landmark plaque

11:35 Address from the ASME Swiss Section (Jaroslaw Szwedowicz)

11:45 Press questions

12:00 – 14:00 Stand up lunch and rides on the funicular

15:00 – 16:00 General assembly of the ASME Swiss Section

16:00 – 18:00 Departures for the day guests

18:30 Dinner for the people staying overnight

Pictures of Gissbach Hotel (2011) and Gissbach-train as upcoming new Historical Landmarks in Switzerland

(Source: http://de.wikipedia.org/wiki/Grandhotel_Giessbach and http://de.wikipedia.org/wiki/Giessbachbahn )


For travelling to Giessbach and back there are several options:

• The most stylish one is the way of our forbearers in 1879; by boat from “Interlaken Ost” (Car parking and

connection to train available) to “Giessbach See” and then the historic funicular to the Hotel. A timetable of

Brienzersee is available on this link: http://www.bls.ch/d/schifffahrt/fahrplan-druckversionen.php. Alternative to

the funicular to the hotel is to walk from the ferry terminal to the hotel (100m elevation, 20 minutes). During this

walk the Abt switch is visible from below the bridge on which it is situated.

• The second option a ten minute Post Bus ride from Brienz followed by a 15 minute walk. At the Brienz Bus Stop

(parking available) departures are 8:37, 10:00, 12:00, 14:37 and 16:37. An alternative is the Hotel bus, which

deliveries you directly to the hotel, departing at station Brienz: 9.30, 14.30, 16.30 and 18.30 or on request.

• The third option is by car: N8, Exit Brienz – Giessbach (direction Axalp) with signs to a large parking area close to

the Giessbach bus stop or to the Hotel (with a limited number of parking spaces). We recommend to car pool (see

poll) to minimise parking issues.

Registration:

In order to allow the planning and to send you the details by mail please register in the following poll

http://doodle.com/6sdsxu358648qzn7

Pictures from https://www.asme.org/about-asme/who-we-are/engineering-history/landmarks/135-neuchatel-gas-turbine

Pictures from http://de.wikipedia.org/wiki/Uri_%28Schiff%29


Pictures from http://en.wikipedia.org/wiki/Pilatus_railway

Fig. Nowadays three ASME Historical Mechanical Engineering Landmarks in Switzerland

Upper picture: First Neuchatel Gas Turbine (1939) in GT Museum, Birr

Middle picture: Paddle Steamer Uri (1901)

Lower picture: Pilatusbahn (1882) cogwheel system Locher


Invitation to the 20th Blade Mechanics Seminar and Exhibition in

Winterthur By Dr Jaroslaw Szwedowicz

The Blade Mechanics Seminar and Exhibition, being organized by the ASME Swiss Section and ZHAW, will be held

on Tuesday September 8th

in Winterthur. Again, about 90 engineers representing various Turbomachinery

companies are expected to attend this engineering event. This one-day seminar allows for a good networking

around different topics of blade design, measurement, optimization, fluid-structure interaction, lifetime

prediction and many others.

In 2015, Dr Paolo Calza from AvioAero Italy, GE Aviation, will give a one-hour keynote presentation on

“Mistuning: a New Design Parameter for LPT Operational Safety - Current and New Horizons”. This lecture will

deliver insight into design of low-pressure turbine whose aero-elastic symmetry is disordered through mistuned

blades. This new design process, based on geometrical mistuning, has been validated experimentally and

investigated numerically. All details of this design process and investigation will be shared by Dr Paolo Calza with

the participants.

In 2014, 94 participants attended the 19th Blade Mechanics Seminar and its Exhibition in Winterthur. The entire

event was received very well, 63% of the participants found it as a good seminar. It is shown in table below, that

19% of the participants identified the seminar as excellent. However, there are still areas for improvements

because 15% and 2% of the participants assessed this seminar as average and rather bad event respectively,

mainly due to exhibition.

The ASME Swiss Section and ZHAW invite you and your colleagues to participant in the anniversary 20th Blade

Mechanics Seminar and Exhibition in Winterthur. Soon the final programme will be completed and all details for

registration can be found at http://project.zhaw.ch/de/engineering/blade-mechanics-seminar.html

We look forward to seeing you at the seminar on September 8th

. Below you find photo impression from previous

Blade Mechanics Seminars and Exhibitions.

excellent good average rather bad bad Total

☺☺ ☺ � � �� [%]

2. How would you rate the Blade Mechanics Seminar overall? 31 64 6 0 0 100

3. How would you rate the presentations? 0 91 9 0 0 100

4. How would you rate the exhibition? 19 57 20 4 0 100

5. Interesting exhibitor - opportunity of networking 18 50 26 6 0 100

6. How would you rate the location Eulachpassage? 30 55 15 0 0 100

19 63 15 2 0

19th Blade Mechanics Seminar and Exhibition in 2014

Overall Assessment


The Flying Engineer

By Geoffrey Engelbrecht

While attending the ASME Turbo Expo conference in Vancouver in 2011 I ran into an old friend who was then

working as an engineer for Pratt & Whitney Canada. When I told him that I had started flying again, he told me

that Pratt & Whitney offered to partly sponsor their engineers to obtain their pilot’s license and he had been

considering taking them up on it.

Pratt & Whitney make aircraft engines so the advantages to engineers who work there are obvious. However

personally I think flying has helped me in my job even though I mainly do engineering work for ground based

power plants.

My love of flying started at an early age. I grew up in Georgetown Ontario Canada, which is located near the

Toronto International Airport, and many of my friends’ parents were either pilots or aerospace engineers.

Toronto was the Canadian base for a number of British aircraft companies that had setup manufacturing,

research and development facilities there in the middle of the 20th Century. This was done initially as a secure

offshore base to build military aircraft during World War II however these companies continued to develop their

own products in the post war era. For a period of time towards the latter half of the 20th century these

companies developed a number of very innovative aircraft including North America’s first jet airliner, the Avro

C102 Jetliner, which flew just 13 days after the De Havilland Comet, Canada’s first jet fighter, the CF-100 Canuck,

a long range supersonic fighter bomber, the CF-105 Arrow, a flying car, the VZ-9 Avrocar, a range of very

successful bush aircraft, the De Havilland Beaver, Otter, Buffalo, Caribou, Twin Otter, Dash 7 and 8, etc, etc.

(upper left) Avro CF-105 Arrow in front of an Avro CF-100 Canuck, (upper right) Avro VZ-9 Avrocar, (lower left) De

Havilland DHC-2 Beaver, (lower right) Air Canada Douglas DC-8 (pictures sourced from Wikipedia)

What really started my interest in flying, though, was being unexpectedly invited into the cockpit of an Air Canada

Douglas DC-8 by a colleague of the father of a friend on my first flight in an airplane. When I turned 17 my

parents organised an introductory flying lesson in a Cessna 152 at the Waterloo Flying Club and I was completely

hooked.

By 1985 I earned my private pilot’s license and was taking anyone, who was willing, up for rides to share my love

of the sky. When I started studying Engineering Science at the University of Toronto I found that I had neither the

time nor the money to keep up my flying. Eventually I allowed my license to lapse by not maintaining my flying


hours and not renewing my medical. This was not due to a loss of interest and I maintained the intent to start

flying again when I was able.

Finally in 2010 I decided I had spent enough time on the ground and started the process to reactivate my

Canadian pilots license and convert it to a European one so I could fly here in Switzerland. In 2011 I successfully

passed the Swiss flight test and earned my EASA private pilot’s license. Since then I have added a night rating,

have done tail dragger difference training and am working on my multi-engine rating.

(left) At the controls of a Cessna 172N in 1985 not long after first obtaining my Canadian pilots license (right)

2015 after doing some flight training on snow in a Piper Super Cub

Flying gives one an appreciation for geography that one doesn’t get on the ground. Yes you can see the

mountains from the ground but they look flat and two dimensional. In the air one truly appreciates for instance

how the Jura mountains rise abruptly from the central plateau and then gradually descend in rolling hills to the

Rhine valley.

The Alps are one of my next challenges, which I have avoided so far due in part to a healthy fear of the challenges

associated with mountain flying. Mountains disturb the air and produce turbulence, updrafts and downdrafts

that can be very dangerous for small airplanes.

(left) Nuclear Power plant at Leibstadt on the Rhine river (right) Schaffhausen looking along the Rhine river

towards the west


Each year I want to try to make a longer trip to see some of Europe from the sky. Last year I flew across France,

around Paris, across the English Channel and across England to visit some friends in Lincoln. And although the

terrain was fairly flat and uninteresting the varying shapes of the farms and the medieval cities with their castles,

cathedrals and walls more than made up for the lack of hills.

(left) the port of Calais while on approach to Calais airport after crossing the English Channel in a Diamond DA40

(right) circling the CN Tower and Rogers Centre in downtown Toronto after getting my night rating in a Cessna

172S

But how does flying help me as an engineer?

Apart from the obvious improved appreciation for aerodynamics there are a number of ways in which flying helps

give me an appreciation for basic engineering principals. Stability and control and how weight and balance

influence this are important factors in how an airplane responds to control inputs, perturbations from air

turbulence and wing stall. Weight and balance relative to the landing gear position can also influence turning

stability when manoeuvring on the ground. Conventional tailwheel landing gear planes, for instance, are unstable

and can yaw rapidly if any lateral forces are introduced while landing or taxiing. Modern tricycle gear airplanes,

on the other hand, are stable and will self-correct when lateral forces are introduced. Another example is that

torque from the propeller can produce significant gyroscopic forces if a rapid pitch or yaw changes are

introduced.

Flying also gives me an appreciation for atmospheric effects. As a VFR or visual flight rules pilot it is extremely

important to understand the weather and what influences it in order to predict changes that will occur during a

flight. Understanding all of the effects that can influence the formation of clouds and fog for instance are very

important. Clouds obscure visibility requiring flight using instruments rather than visual references for which I am

not trained. Clouds with high vertical development and strong thermal currents contain severe turbulence which

has been powerful enough to cause large airline jets to crash. They can also contain water near the freezing point

which can form ice on an aircraft modifying its aerodynamics increasing drag and reducing lift. Wind, which can

be problematic in the mountains, can also pose a threat while landing. Strong gusts can make a plane susceptible

to stalling and wind from the side can cause a plane to drift sideways, which especially for tailwheel aircraft can

be very dangerous at touch down. Air temperature influences air density which affects lift, thrust and engine

power.


(left) Lycoming O-320 engine and ancillary systems (right) control cable and rod of the right aileron on a Piper

Super Cub

Another more direct way in which flying has helped me as an engineer is that, unlike driving a car, if something

breaks in flight it is not possible to pull to the side of the road. As a result it is important to understand how every

system (hydraulic, electrical and mechanical) works on the airplane so that should something go wrong one

knows how to trouble shoot the problem in the sky to either fix it or at the very least to minimise the

consequences of it so that one has the greatest chance to get the plane safely on the ground again.

It is an expensive hobby but there is nothing more rewarding than floating across the Swiss landscape a few

thousand feet over the ground in a Piper Super Cub.

Are you interested in Newsletter Advertisement?

The Swiss Section of ASME issues newsletter three times in a year, for any advertisement on this newsletter please

contact any one from executive board of the Swiss Section of ASME or an Editor of the newsletter.

Please note that publishing the advertisement is subjected to the approval of the ASME Swiss Section Executive

Board.


Call for 2015 ASME Swiss Section Young Engineer Award

The Swiss Section of the American Society of Mechanical Engineers (ASME Swiss Section) serves the Swiss

engineering community by advancing, disseminating and applying engineering knowledge for improving the

quality of life; and communicating the excitement of engineering to its members. The aim of the ASME Swiss

Section Young Engineer Award is to recognize and promote excellence in engineering across Switzerland and

reward young engineers on the merit of their work.

The Award is open to young engineers who have at least a Bachelor degree in Mechanical Engineering and have

no more than two years’ engineering experience since the date of Bachelor or Master graduation, provided the

Masters was obtained within two years from the Bachelor graduation.

Applicants are required to submit a technical publication (3 pages max. of about 1500 words including 2-3

diagrams or pictures) on a topic of their choice directly relevant to mechanical engineering. The work must be

written for the general mechanical engineering community, which may be understood by engineers and

researchers representing various branches of the Swiss Industry and Academia. The template of the paper is

available from the ASME Swiss Section website space on ASME.org

Evaluation of the Award will be conducted by ASME Swiss Section members with technical expertise in the field

and a shortlist of finalists will be selected based on an established grading criteria.

The winner will be finalized by the ASME Swiss Section committee and will be presented with their award at an

ASME Swiss Section function held in June 2015. All shortlisted entrants will have their article published in the

October edition of the ASME Swiss Section newsletter.

The prizes will be distributed as follows:

• 1st CHF1,000 Certificate and one year’s ASME membership and a one-year subscription to an

ASME journal of choice.

• 2nd Certificate and one year’s ASME membership

• 3rd Certificate

Application

To apply for the award, interested persons shall, before the deadline of September 14th 2015, send by email a

.pdf file containing the following:

1. a copy of the technical paper

2. a brief application letter with picture explaining the nature of their work

3. a copy of their graduation certificate or proof of graduation from university.

4. a short biography of the author,

Submissions to Dr. Daniel Kearney: [email protected]

Key dates

• Submission open February 1st 2015

• Closing date September 14th 2015

• Award announcement – October newsletter 2015

• Presentation of award – October 2015


The France Section of ASME organizes the 14th EDF – PPRIME

Workshop and invites Swiss Section Members to attend:

14th EDF – Pprime Workshop

"Influence of design and materials

on journal and thrust bearing performance"

FUTUROSCOPE – October 8 & 9, 2015

http://edf-pprime-2015.sciencesconf.org

organized by Electricité De France Direction Recherche et Développement and Département Génie Mécanique et Systèmes Complexes of the Institut Pprime.

The invited Lecturer is Steve Dixon,

Fellow of the Institution of Mechanical Engineers, Michell Bearings, Rolls-Royce Power Engineering, UK.

"Hydrodynamic Bearings – Robust Design Ensures Success."

We wish your presence at this workshop and we would like to invite you to submit a paper in the field of the workshop topics:

Modelling and experiments: hydrostatic, hydrodynamic, mixed and EHD lubrication,

New materials, new design, textured surfaces,

Multiphysics coupling: dynamic and thermal behaviour,

Adverse conditions: misalignment, scoring damage, wear, coating degradation…

Unusual lubrication: solid and water contaminations, emulsions…

Condition monitoring: detection and control,

Failures analyses and industrial feedback.


TECH in BRIEF: Experimental evaluation of local heat transfer

distributions in high crossflow narrow impingement channels

using the transient liquid crystal technique

S. LLUCIÀ, A. TERZIS, P. OTT – Group of Thermal Turbomachinery (GTT), EPFL Lausanne

In modern turbine airfoils, narrow impingement cooling channels can be formed in a double-wall configuration

where the coolant is practically injected within the wall rather than the hollow of the airfoil. In these wall-

integrated cooling cavities, the generated crossflow is one of the most important design factors, and hence, the

number of impingement holes included in a channel. This study examines experimentally the influence of the

number of impingement holes on the heat transfer characteristics of narrow impingement channels. The

channels consist of two rows of jets where the number of holes in the axial direction is varied from 5 to 10,

maintaining the same jet plate open area. Local heat transfer coefficient distributions are obtained for all channel

interior walls using the transient liquid crystal technique and over a range of Reynolds numbers (20,300-41,500).

The results show important heat transfer degradation at higher open areas and a small influence of the number

of holes at upstream channel positions.

Figure 1. Schematic representation of narrow impingement channels

Experimental Details

The test facility used is an open circuit wind tunnel operated in suction mode consisting of an inlet flare, a heater

mesh, the narrow impingement channels and the driving pump. The evolution of the liquid crystal colour is

recorded with a high definition RGB camera under uniform illumination provided by two fluorescent white lights

mounted on both sides of the test rig, as shown in Figure 1.

The impingement channel consists of two rows of several impingement holes with L/D=2, where D represents the

jet diameter. A single exit mode is selected, so a maximum crossflow orientation is represented. The streamwise

hole spacing (X/D) and the channel height (Z/D) are set to 5 and 3, respectively. The channel width (Y/D) is varied

between 3 and 6 jet diameters, and the number of holes, N, in the streamwise direction from 5 to 10, composing

a test matrix of 24 different geometries. The transient liquid crystal technique has been used in this study. Due to

the low thermal conductivity of the model material, the lateral conduction into the model is assumed negligible

within the duration of the transient experiment. Local heat transfer coefficients on the model surface can be then

evaluated using Duhamel’s superposition theorem, which approximates the real temperature evolution by a

number of ideal temperature steps. For the evaluation of h, the maximum green intensity was considered, similar

to [1], which is less sensitive to illumination, view angles and reflections. Thermocouple thermal inertia effects

were also considered according to [2].

Results and discussion

In this study, the determination of massflow distribution and crossflow development was obtained with a 1D

model of Florschuetz et al. (1981) [3], which is also valid for narrow impingement channels, as shown by [4]. As

expected, at a given number of holes per row, the smaller the channel width the higher the jet variation. This is

attributed to the lower channel cross-sectional area, which results in increased crossflow velocities, and thus,


higher static pressure drop. At a given channel width, on the other hand, the jet massflow variation is also

increased with increasing the number of holes due to the bigger channel length.

The surface contours of heat transfer coefficients (h), normalized with the maximum obtained value and the

corresponding spanwise averaged NuD,s distributions are presented in Figure 2 for 5, 8 and 10 holes and

ReD=29,000.

Results for the target plate show

that at upstream channel

positions, especially for jets 1, 2

and 3, the heat transfer

coefficients are maximized in

the stagnation point regions

providing a circular heat transfer

distribution. However, as the

crossflow is developed, the heat

transfer distributions are

converted to a horseshoe vortex

shape distribution for all

channels and the peaks of heat

transfer are deflected in the

direction of the crossflow.

Additionally, the local heat

transfer distributions for the

first five holes are very similar

for the different channels

indicating a negligible effect of

number of holes per row on the

heat transfer level and

distribution. Due to the overall

geometrical symmetry, the heat

transfer level is the same for

both sidewalls. Higher local

heat transfer coefficients are

observed closer to the target plate, due to the impingement of the wall-jet flow with the sidewall. This peak of

heat transfer is increased in thickness and also deflected in the streamwise direction due to the influence of the

generated crossflow.

For the jet plate, the wall-jet flow in the channel interferes with the sidewalls causing a post-impingement flow to

the impingement plate. The uplift moving of the flow causes therefore higher local heat transfer coefficients

closer to the sidewalls of the channels, as shown in Figure 2(c). Note that for the channel with N=10, the

achievable spanwise averaged Nusselt numbers close to the exit of the channel are slightly higher compared to

the target plate indicating clearly the different effect of the generated crossflow on the two walls.

Figure 3 shows the local NuD distribution on the centerline of the 5th row, for two channels with different number

of holes per row (N) and channel widths (Y/D).

For Y/D=3, Figure 3(a) shows that the level and distribution of NuD is very similar for all channels with different

number of rows and the differences are within the experimental uncertainties. This means that additional

number of holes per impingement row do not affect the level and distribution of heat transfer coefficients at

upstream channel positions. This could be attributed to the same local crossflow-to-jet mass velocity ratio, which

also remains for the same longer channels. Similar behavior is also observed for Y/D=6. However, the main

differences here are observed for the overall level and distribution of NuD. As the crossflow in the channel is

decreased, the deflection and reduction of the stagnation point heat transfer are less pronounced. Therefore, the

peak of heat transfer is shifted closer to the stagnation point as Y/D is increased from 3 to 6. Nonetheless, the

Figure 2. Surface contours and spanwise averaged Nusselt for all channels walls and

various number of holes. X/D=5, Y/D=3, Z/D=3, ReD=29,000


effect N per channel remains the same with no impact on the level and distribution of NuD at upstream channel

positions.

Figure 3. Local NuD distribution on the centerline of the fifth impingement hole

Conclusions

Results have shown that at a given Reynolds number, additional holes per row reduce the local jet massflow of

the upstream jets in order to compensate the increased jet mass velocities of the downstream regions. Obviously,

higher crossflow is developed in the channel when channel width is reduced. The heat transfer results indicated

that the addition of holes do not affect the level and distribution of local heat transfer coefficients at upstream

channel positions. For the channel width variation, narrower channels can be beneficial for upstream channel

positions in order to increase the jet plate open area, while wider channels are desirable for downstream channel

positions in order to reduce crossflow effects. For the complete area averaged Nusselt numbers, the data for the

target plate indicated that longer channels with 10 holes per row provide 10-15% lower heat transfer capabilities

compared to short channels consisting of 5 holes per row.

References

[1] Poser, R., von Wolfersdorf, J., and Lutum, E. (2007). Advanced evaluation of transient heat transfer experiments using thermochromic liquid crystals. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 221(6):793–801.

[2] Terzis, A., von Wolfersdorf, J., Weigand, B., and Ott, P. (2012). Thermocouple thermal inertia effects on

impingement heat transfer experiments using the transient liquid crystal technique. Measurement Science

and Technology, 23(11):115303.

[3] Florschuetz, L. W., Truman, C. R., and Metzger, D. E. (1981). Streamwise Flow and Heat Transfer

Distributions for Jet Array Impingement with Crossflow. Journal of Heat Transfer, 103(2):337–342.

[4] Terzis, A., Ott, P., Cochet, M., von Wolfersdorf, J., and Weigand, B. (2014). Effect of Varying Jet Diameter

on the Heat Transfer Distributions of Narrow Impingement Channels. Journal of Turbomachinery, 137(2).

[5] Llucià, S., Terzis, A., Ott, P., Cochet, M, (2014). Heat transfer characteristics of high crossflow impingement

channels: Effect of number of holes. European Turbomachinery Conference 2015. [Presently under review]


ASME Training & Development courses for 2015 in Europe

Milan, Italy - 22 – 26 June 2015

� Boilers and Pressure Vessels

� PD443 - BPV Code, Section VIII, Division 1:

� PD441 - Inspection, Repairs, and Alterations of Pressure Equipment

� PD442 - BPV Code, Section VIII, Division 1: Design and Fabrication of Pressure Vessels

� PD616 - API 579-1/ASME FFS-1 Fitness-For-Service Evaluation

� PD716 - BPV Code, Section I: Power Boilers

� Bolting

� PD577 - Bolted Joint Assembly Principles Per PCC-1-2013

� Fluids and Heat Transfer

� PD679 - Selection of Pumps and Valves for Optimum System Performance

� Nuclear

� PD635 - ASME NQA-1 Quality Assurance Requirements for Nuclear Facility Applications

� PD615 - BPV Code, Section III, Division 1: Class 1, 2, & 3 Piping Design

� PD644 - Advanced Design and Construction of Nuclear Facility Components per BPV Code, Section

III

� PD672 - BPV Code, Section XI, Division 1: Inservice Inspection 10-year Program and 10-year

Program Updates for Nuclear Power Plant Components

� PD192 - BPV Code, Section XI : Inservice Inspection of Nuclear Power Plant Components

� Piping and Pipelines:

� PD410 - Detail Engineering of Piping Systems

� Welding:

� PD645 - BPV Code, Section IX: Welding, Brazing, & Fusing Qualifications

ASME MasterClass, 22–26 June, Milan, Italy

In addition to our public training offer, ASME is now pleased to present ASME MasterClass Series in Europe. ASME

MasterClasses are premium learning programmes covering advanced topics aimed at experienced engineering

professionals. Led by renowned industry experts, MasterClasses emphasise learning through discussion of real

world case studies and practical applications.

Courses in Milan include:

� Design by Analysis Requirements in ASME Boiler and Pressure Vessel Code Section VIII, Division 2

(MC121),

22–23 June

� Techniques and Methods used in API 579-1/ASME FFS-1 for Advanced Fitness-For-Service (FFS)

Assessments (MC113), 24 June

� Bases and Application of Heat Exchanger Mechanical Design Rules in Section VIII of the ASME Boiler and

Pressure Vessel Code (MC104), 25–26 June

� Structural Materials and Design for Elevated to High Temperatures (MC112), 25–26 June

� Inspection Planning Using Risk-Based Methods (MC124), 25–26 June


Do you want to become ASME Member?

Do you want to refer your colleagues, friends, and peers to join ASME as a member?

Connect with the best minds in engineering, advance your career, and make a difference by getting involved.

Join ASME's community of engineers to learn new technologies, keep your skills up to date, explore solutions to

technical problems and advance your career.

As an ASME member, you can take advantage of extensive professional and student benefits, most of which are

available at no additional cost or at a substantial discount.

If your answer is yes then Click here - http://www.asme.org/about-asme/membership

ASME In-company Training & Development

Train your staff at your choice of location, on your preferred dates, with a corporate programme tailored to your

specific company requirements.

All ASME Continuing Education training courses can be arranged exclusively for your staff and customised to your

company's needs. Courses will be delivered by uniquely qualified instructors selected to match your needs and

organisational style and approach – most of them are involved in the ASME Code committees who create and

update ASME standards.

Save time and money by hosting a course at your company building or at another venue of your choice.

Encourage ongoing learning with Continuing Education Units and a complimentary one-year ASME membership.

The ASME In-Company Training service offers you:

• Training courses tailored specifically for your organisation, addressing your specific issues and challenges

• Courses that accommodate your schedule and are held at your facility

• Convenient and cost-effective educational programmes- Opportunities to train your staff in full

confidence – customisation, results, privacy, quality, value

For more information on in-company training programmes and to discuss your needs in detail, please contact: Murat Dogru, Community and Corporate Relations Manager Email: [email protected] • Tel: +32 2 743 4427

Documents

ASME Community - Swiss Section News · 2015. 6. 1. · ASME Swiss Section Newsletter #11 Page No 2 May 2015 Now in its 60th year, ASME Turbo Expo is recognized as the must-attend