Shape Optimization Using FRIENDSHIP-Framework and STAR-CCM+ CAE Test - - PowerPoint PPT Presentation

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Shape Optimization Using FRIENDSHIP-Framework and STAR-CCM+ CAE Test - - PowerPoint PPT Presentation

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Shape Optimization Using FRIENDSHIP-Framework and STAR-CCM+ CAE Test Case with KRISO KCS and MTU 90 Diffuser www.friendship-systems.com Outline Introduction PART 1 KCS Case Geometry Integration Optimization PART 2 90

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www.friendship-systems.com

Shape Optimization Using FRIENDSHIP-Framework and STAR-CCM+

CAE Test Case with KRISO KCS and MTU 90° Diffuser

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Engineering software for optimal products | 09.05.2012 | 2

Outline

  • Introduction
  • PART 1 KCS Case
  • Geometry
  • Integration
  • Optimization
  • PART 2 90° Diffuser
  • Parametric Model
  • Target
  • Optimized Result
  • Conclusion
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INTRODUCTION

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FRIENDSHIP SYSTEMS

  • Founded 2001 in Potsdam/Berlin
  • A GL Company, Marine Solution Part since 2009
  • Developes and Provides CAE Platform ( FRIENDSHIP-Framework )
  • Supports Technical Issues and Projects
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Daehwan Park

  • M.Sc. NAOE Pusan National University
  • Ph.D Student NAOE Technical University Berlin
  • Project Manager FRIENDSHIP SYSTEMS
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FRIENDSHIP-Framework

  • CAD
  • Integration Interface
  • Optimization Engine

FRIENDSHIP-Framework the CAE platform

CAD Integration Optimization CAD Optimization Integration

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FRIENDSHIP-Framework CAE Experience

STAR CCM+

SHIPFLOW RAPID Nu_SHALLO HydroMax ICEM + CFX FreSCO FINE/MARINE In-House Code

  • CAD
  • Coupling Interface
  • Optimization Engine

FRIENDSHIP-Framework the CAE platform

WAVIS Neptune POSEIDON NAPA

  • AUTOMATED MESH GENERATION
  • MACRO / JOUNAL
  • COMMAND FILE
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Selected customers 8

  • DSME
  • HHI
  • SUNGDONG
  • STX
  • MOERI
  • Pusan National University
  • Mokpo National University
  • KAIST

Growing Interest from 2010 by Korean Industries and Academic Field

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Cooperation between CD-Adapco & FRIENDSHIP SYSTEMS

CD-Adapco

Nurnberg

FRIENDSHIP SYSTEMS

POTSDAM

IGES STL FILES JAVA MACRO INTEGRATION OPTIMIZATION

WIN-WIN Cooperation

CD-Adapco team has never used FRIENDSHIP-Framework FRIENDSIHP SYSTEMS has never used STAR CCM+ Telephone, Email and Done!!!

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PART 1 KCS Case

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GEOMETRY

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Import KCS model in IGES patches

Main Principals

  • Lpp 230 M
  • B 32.2 M
  • D 10.8 M
  • Fn 0.26 (24 Knot)

Reference

Kim, W.J., Van, D.H. and Kim, D.H., (2001), “ Measurement of flows around modern commercial ship models”, Exp. in Fluids, Vol. 31, pp 567-578

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Desingularization

  • Singularity in

Stern Valley

  • Divide patches
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Desingularization

  • Extract 4 edge curves
  • Create coons patch
  • Singluarity disappeared
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Desingularization

  • Singularity in

Bulb

  • Subdivision
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Desingularization

  • Singularity in

Bulb

  • Regularity after

Subdivision

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Desingularization

  • Cut the corner
  • Duplicated IGES Patch
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Fill Deck Surface

  • Produce deck surfaces from the given patches
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Water-Tight Trimesh

  • Joint the patches with gaps

Tolerance 0.01 Adaptive Tesselation Error 0.01 Tolerance 0.07 Adaptive Tesselation Error 0.01

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Water-Tight Trimesh

1_Trimesh 2_Trimesh 2_Trimesh 2_Trimesh 2_Trimesh Trimesh Hull

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Water-tight Trimesh Trimesh Deck Trimesh Transom Trimesh Hull

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Hydrostatics for Sactional Area Curve

  • Extraction offset groups from IGES surfaces
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Hydrostatics for Sactional Area Curve

  • SAC as input in Lackenby variation
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Lackenby Variation & Design Variables

Dv_dLcb Dv_fbdyTanBeg Dv_fbdyTanEnd Image Trimesh

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Export STL

  • Export the varied image trimesh as STL format.
  • .exportSTL() or .exportColourSTL()
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Integration

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Integration

Definition

(Define Input & Output)

Configuration

(Set Input Values)

Computation

(Compute and Read Output)

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Integration

  • Definition

Integration Editor

Template files Entries Java Macro Sim File Input Files Result Files Deck.Stl Hull Stl Transom Stl Result Table (CSV) Screenshot 1 Screenshot 2 … …

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Integration

  • Definition

Example : JAVA Macro Integration

  • Just import java macro file
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Integration

Deck.Stl Hull Stl Transom Stl Result Table (CSV) Wave Elevation Wave Center Profile Drag Convergency Streamline

  • Configuration

FRIENDSHIP- Framework STAR CCM+

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Integration

  • Computation

Argument for POD license

  • "-power -podkey

98XXX/x3xXX3Xd/91X9XX== -licpath 1999@flex.cd-adapco.com -batch automationScale.java setup.sim"

  • Set the executable path
  • Set argument
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Integration

  • Computation

Test Computation

  • Very small Max. Physical Time (6e-2)
  • Check if STAR-CCM+ is integrated.c
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OPTIMIZATION

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Automated Optimization

Decision Making FRIENDSHIP-Framework Optimization Engine JAVA Macro SIM STLs

< 1. Writes>

STAR CCM+

< 2. Triggers> < 3. Reads>

*.png *.csv

< 5. Writes> < 6. Reads>

Form Variation

Mesh Gen & Computation

< 4. Run>

Optimum Design

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Computation Environment in CD-Adapco

  • Maximum Physical Time

20.0

  • 6 Threads
  • Linux
  • Duration per Computation

About 2 hours

Selected Max. Physical Time 20 Full Max. Physical Time 30

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Geometry Scaled

Scaling is implemented in JAVA macro. Model Scaled in 1/31.6

  • Lpp 7.27
  • B 1.02
  • D 0.34
  • Fn 0.26
  • Rn 1.4x10^7
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Global Search with Sobol

Design variables

Dv_dLCB [ -0.01, 0, 0.01 ] Dv_fbdyTanBeg [ -30, 0, 30 ] Dv_fbdyTanEnd [ -30, 0, 30 ]

Objective

Drag force

Variants number

20

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Select the best variant

Dv_dLCB = 0.00125 Dv_fbdyTanBeg = - 3.75 Dv_fbdyTanEnd = - 18.75 Drag original 44.2 Drag selected 43.55 (-1.5%)

Original Selected

Setions at regular stations

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PART 2 MTU 90° Diffuser

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90° Diffuser

Integration via Case Study

  • In collaboration with

MTU Friedrichshafen GmbH

  • Diffuser: engine component

which turns flow of around 1kg/s, direction change of 90°

  • Hot exhaust gas at approximately 500°C
  • Design study for curved part
  • Compare with CFD results of a diffuser which is in service
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Parametric Model

Design Variable

  • Elbow Shape by Volume Parameter
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Target

  • Pressure Drop at Bend Exit
  • Uniformity Index at Bend Exit
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Optimized Result

Pressure Drop [mbar]

(The Lower The Better)

47 15 14 Uniformity Index

(The Higher The Better)

0.51 0.86 0.87 Objective Original Model MTU Trial and Error Automated Optimization

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Optimized Result

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  • Auto-Mesh and JAVA Macro of STAR-CCM+ is main feature of this

CAE process.

  • Integration is done in 5 minutes.
  • Global search leads designers to the further intuition.
  • Enlarge CAE cases between

STAR-CCM+ and FRIENDSHIP-Framework Conclusion & Outlook

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www.friendship-systems.com

Thank you very much for your attention

FRIENDSHIP SYSTEMS GmbH

  • Benzstr. 2

14482 Potsdam Germany park@friendship-systems.com