20th Blade Mechanics Seminar & Exhibition

Tuesday, September 08, 201507.45h – 17.30h, Winterthur (Switzerland)Zurich University of Applied Sciences

In co-operation with

Zurich Universities of Applied Sciences and Art www.zhaw.ch

Aim/Keynote

• ABB• Ansaldo Energia• ANSYS• ASME Europe

• FOGALE nanotech• IMES Institute of Mechanical Systems, ZHAW• MSC Software GmbH• SIEMENS

Goals and MotivationWe are glad to announce that the ZHAW Zurich University of Applied Sciences is about to organize the 20th Blade Mechanics Seminar in cooperation with the Swiss Section of ASME. It will be held on 08th September 2015 in a similar theoretical and practical framework and a variety of interesting topics as the previous conferences.

The unchanged key target is to offer a platform for know-how and experience exchange among engineers from various turbomachinery companies. The Blade Mechanics Seminar aims to answer the participants’ needs coming from their daily work on axial and radial bladed discs of aero- and heavy-duty engines. All presentations will be held in common engineering terms by using comprehensible mathematics.

Keynote Presentation

Dr. Paolo Calza, AvioAero Italy, GE Aviation

Mistuning: a New Design Parameter for LPT Operational Safety - Current and New Horizons

A challenge in next generation engines is to find the best trade-off between the conflicting aerodynamic and structural demands. Several design features are commonly used by LPT ma-nufacturers to reduce flutter or vibration attitude, but with some costs in terms of efficiency, ma-nufacturing and weight. Some of these are more focused towards aerodamping control, while others are linked to mechanical damping increasing. In all cases, reliable and robust aerome-chanical design capabilities are crucial in efficiently and promptly managing flutter or resonance problems occurring from the earliest design phase.

To prevent flutter issues, the optimal aero-design needs to be accommodated by introducing geometry modification, although there are some negative impacts in terms of efficiency and weight. Conventional flutter analyses are based on “perfect tuned configurations”. Then, all air-foils vibrate in the same way with an Inter-Blade Phase Angle defined by the Nodal Diameter. The mistuning breaks this aeroelastic symmetry with a consequent reduction of the reciprocal aero-dynamic interactions. This effect can be intentionally amplified by designing airfoils with minor differences to stabilize flutter. Hence, the mistuning technology represents a great opportunity to avoid flutter instability without impacting on aero-performance and weight.

The presentation is focused on recent experimental/numerical achievements performed to ma-ture the mistuning technology on LPT. A flutter unstable configuration (tuned) was designed and tested in a Cold Flow and flutter-vibrations were measured. The same configuration was then mistuned to stabilize flutter phenomena. No vibrations were detected for this configuration du-ring the Cold-Flow test. Therefore, the test results demonstrate that the mistuning has a positive effect on flutter stability. In addition, the overall mechanical Damping was characterized in an innovative in-vacuum spinning-rig designed and built to excite asynchronous vibrations. Finally, the outcomes of the two test campaigns were analyzed and cross-correlate to better interpret the physics behind the measured vibration amplitudes

Exhibition

Programme

07.45

08.20

08.30

09.30

10.00

10.30

11.00

11.30

12.00

12.30

13.30

14.00

14.30

15.00

15.30

16.00

16.30

17.00

17.30

Registration with Welcome Coffee & Croissants

Address of Welcome

Keynote Presentation:Mistuning: a New Design Parameter for LPT Operational Safety - Current and New Horizons

Session 1 - Tip Timing Blade Measurements Monitoring of LPT Blade Vibration in the largest power plant in Europe

Recent applications on blade vibration estimation from tip-timing data

Coffee Break & Visit of Exhibition of Seminar Sponsors

Session 2 - Non-linear Bladed Disc AnalysesVibrational Behaviour of Friction-Damped Bladed Disks considering Rotational Speed-Dependent Structural Quantities

Experimental Analysis of Modal Interaction between a Centrifugal Compressor and its Casing

Sensitivity and Robustness Analyses of Non-linear Bladed Disc Dynamics

Lunch & Visit of Exhibition of Seminar Sponsors

Session 3 - Mistuned Disc Assembly AnalysesImpact of Manufacturing Process on Eigenfrequencies of Turbine Blade

Mistuning of Small Turbine Wheels in Automotive Turbochargers

Free and Forced Vibration Analysis of Mistuned Freestanding Turbine Blade

Mistuned Bladed Disks with Aeroelastic Coupling

Coffee break & Visit of Exhibition of Seminar Sponsors

Session 4 - Blade Measurements, Damping Evaluation, and Reliable SimulationsDamping Estimation for Turbine Blades in Run-up Tests

Experimental Blade Vibration Measurements on Rotating Turbomachinery Bla-desA GPU-Parallelized Fluid-Structure Interaction compressible RANS solver for turbomachinery applications

Closing Remark

Jürg Meier, Jaroslaw Szwedowicz

Paolo Calza; AvioAero Italy, GE Aviation, Italy

Radoslaw Przysowa; ITWL - Air Force Institute of Technology, PolandAgathe Vercoutter;Turbomeca, France

Torsten Heinze;Leibniz University Hannover, Germany

Patricio Almeida;SAFRAN Turbomeca, France

Evgeny Petrov; University of Sussex, UK

Adil Alam;Alstom Power, SwitzerlandDavid Hemberger;IHI Charging Systems, GermanyOmid Sedaghat;MAPNA Turbine Engineering, Iran Sebastian Willeke; Leibniz University Hannover, Germany

Luigi Carassale; University of Genova; ItalyFlorian Schönleitner;Graz University of Technology, AustriaAndrea Gadda;Politecnico di Milano, ItalyHSLU Luzern T&A, Switzerland

The Exhibition is free-of-charge for students and others during the technical sessions.

General Information

Conference VenueZHAW Zurich University of Applied Sciences, Eulachpassage, building TN E0.58, Technikumstrasse 71, 8401 Winterthur

The conference venue is situated at a walking distance of 450 metres from the station. The trains run as often as every 15 to 20 minutes from Zurich Airport and take about 15 minutes to arrive in Winterthur.

Costs and Closing Date The participation fee amounts to CHF 200 (approx. 190.- Euro) for registrations until August 23, 2015 or CHF 230 (approx. 220.- Euro) for registrations after this date. This payment includes also documents (proceedings on CD) and meals.

Registration Please register online at: www.imes.zhaw.ch/blade-mechanics-seminar

Hotel InformationFor special hotel rates for participants at the Blade Mechanics Seminar please see: www.imes.zhaw.ch/blade-mechanics-seminar

Organizer

University of Applied Sciences (ZHAW) in Winterthur, in co-operation with the Swiss Section of ASME

Prof. Dr. Jürg Meier Dr. Jaroslaw Szwedowicz Susanne Schütz Head of Institute of Chair of the Swiss Seminar OfficeMechanical Systems Section of ASME Institute of Mechanical Systems

ZHAW Zurich University ALSTOM (Switzerland) ZHAW Zurich University of Applied Sciences of Applied Sciences +41 (0) 58 934 72 27 +41 (0) 58 505 48 80 +41 (0) 58 934 77 86mrjg@zhaw.ch jaroslaw.szwedowicz@ scuu@zhaw.ch power.alstom.com

Further Information/Abstracts For abstracts of the presentations and further information please contact our webpage: www.imes.zhaw.ch/blade-mechanics-seminar