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

4

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD codes boom in the ’90s

PHOENICS

FLOW 3D

FLUENT

STAR CD

TascFlow

….and more

5

#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

6

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD application for design support

7

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD application for design support Ship Aerodynamics

8

#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

CFD application for design

#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

13

#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%

14

#Sharing3FVG Il programma che condivide e stimola l’innovazione

OpenShip results

OpenFOAM AnsysCFX

15

#Sharing3FVG Il programma che condivide e stimola l’innovazione

Hull Appendages Resistance

16

#Sharing3FVG Il programma che condivide e stimola l’innovazione

Open Water Propeller

Propeller E799A open water

results

17

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD advanced applications Unsteady calculation for hull / propeller interaction

18

#Sharing3FVG Il programma che condivide e stimola l’innovazione

Flow past vertical cylinder

19

#Sharing3FVG Il programma che condivide e stimola l’innovazione

OpenFOAM Scaling Test

20

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD boundery conditions KCS Tanker

21

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD grid analysis KCS Tanker

22

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD KCS results

23

#Sharing3FVG Il programma che condivide e stimola l’innovazione

KCS total drag

24

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

25

Fixed T&S:

2.25 M cells

Software:

OpenFOAM 2.2

Free T&S:

2.8 M cells

Software:

OpenFOAM 2.3

#Sharing3FVG Il programma che condivide e stimola l’innovazione

CFD next steps

26

#Sharing3FVG Il programma che condivide e stimola l’innovazione

Thank you for your attention

27