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Webinar realizzato da IALFVG e parte degli 80 di #Sharing3FVG, progetto cofinanziato dal Fondo Sociale Europeo nell'ambito del Programma Operativo Regionale 2014/2020
#Sharing3FVG
30 marzo 2017 ore 16
Sviluppi della fluidodinamica CFD applicata alla progettazione
Relatore: Giovanni Caprino
#Sharing3FVG Il programma che condivide e stimola l’innovazione
Who and Where we are
A company of the FINCANTIERI Group from 1962, dedicated to research & development in the marine field , consultancy, services and training for ship designers, shipbuilders, suppliers and maritime operators.
2
FINCANTIERI
71,1% SEAF
15%
MARIOTTI
10%
LEONARDO
2,6% CNR-INSEAN
1,3%
Genova Trieste
Castellammare
Palermo
Muggiano
Riva T.
Ancona
Main office in Genova offices in: Trieste
Palermo
Muggiano
Castellammare
Ancona
a Workshop in Riva Trigoso
Staff: Different skills for a
good team
naval architects
mechanical engineers
electrical engineers
physicists
civil engineers
philosopher
chemical engineers
IT engineer
architects
environmental scientist
maritime economy expert
technicians
ship designers
#Sharing3FVG Il programma che condivide e stimola l’innovazione
Optimisation of ship superstructures to reduce impact of exhaust gases and turbulence in passenger areas
BULB optimisation
Optimisation of propeller APPENDAGES
Engine room VENTILATION
PROPELLER DESIGN to improve performance, reduce cavitation
Position and design of RUDDERs and other manoeuvring devices
AIR CONDITIONING in public areas and cabins
Thermal shock
Main CFD activities
3
#Sharing3FVG Il programma che condivide e stimola l’innovazione
Early CFD
Cetena performs numerical simulations since the early ‘70
Fortran codes
Single purpose
No graphical interface
Output files ASCII
Customizable I/O
SW/User interaction
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD codes boom in the ’90s
PHOENICS
FLOW 3D
FLUENT
STAR CD
TascFlow
….and more
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD codes in use in Cetena
Home made
PROPACE
PFP
WARP
Commercial
Ansys CFX
Fluent
Star CCM+
Ansys ICEM
OpenFOAM
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD application for design support
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD application for design support Ship Aerodynamics
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD application for design support CFD / FEM coupling
Stress distribution
Computation of forces acting on rudder and stress distribution.
Propeller effect is introduced through
analytical distribution in the computational domain at the propeller
location.
9
#Sharing3FVG Il programma che condivide e stimola l’innovazione 10
CFD application for design support
#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD application for design support
12
#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD application for refitting - Rudder Erosion CFD experimental Tests
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
OpenFoam - Wave pattern / hull resistance
Wake Cut at y/LBP=0.0741
-6.00E-03
-4.00E-03
-2.00E-03
0.00E+00
2.00E-03
4.00E-03
6.00E-03
-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0
x/Lpp
z/Lp
p
Experimental LTSInterFOAM
KCS results
Solver Cells CT ∆%
EXP 0.003519
interFOAM 3361811 0.003465 -1.55%
interFOAM 2548686 0.003405 -3.25%
interFOAM 2699441 0.003404 -3.26%
LTSInterFOAM 1108484 0.003446 -2.08%
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
OpenShip results
OpenFOAM AnsysCFX
15
#Sharing3FVG Il programma che condivide e stimola l’innovazione
Open Water Propeller
Propeller E799A open water
results
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD advanced applications Unsteady calculation for hull / propeller interaction
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
CFD boundery conditions KCS Tanker
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#Sharing3FVG Il programma che condivide e stimola l’innovazione
KCS total drag
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Solver Cells CT ∆%
EXP 0.003519
interFOAM 3361811 0.003465 -1.55%
interFOAM 2548686 0.003405 -3.25%
interFOAM 2699441 0.003404 -3.26%
LTSInterFOAM 1108484 0.003446 -2.08%
#Sharing3FVG Il programma che condivide e stimola l’innovazione
Combat vessel calculation
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Fixed T&S:
2.25 M cells
Software:
OpenFOAM 2.2
Free T&S:
2.8 M cells
Software:
OpenFOAM 2.3