Tire Water Splash - Thermohani/OFGBG12/slides/DragosMoroianu.pdf · 2012. 11. 28. · Tire Water...
17
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011 Page 1 Tire Water Splash Dragos Moroianu Volvo Car Corporation Andreas Blixt FS Dynamics
Transcript of Tire Water Splash - Thermohani/OFGBG12/slides/DragosMoroianu.pdf · 2012. 11. 28. · Tire Water...
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 1
Tire Water Splash
Dragos Moroianu
Volvo Car Corporation
Andreas Blixt
FS Dynamics
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 2
Overview
Background
Current Approach
New Approach
Model description
Results
Conclusion
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 3
About us Volvo Car Corporation – Fluid Dynamics Center
•18 employees
• support 5 attributes
• start 1990
FS Dynamics
•150 employees
• start 2004 (4 persons)
•consultance in engineering applications with
solutions based on CFD/FEM
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 4
Background
What is splash?
Why is splash a problem?
Current splash CAE method description
4 Thursday, November 15, 2012
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 5
Speed between 30-65km/h
Water depth 20-80mm
Higher depth... Wading
Even higher depth ... submarine
What is splash
5 Thursday, November 15, 2012
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 6
What is really the problem with
splash?
• Engine bay water contamination
• High water loads on critical components
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 7
Numerical (LPT) - hard to estimate
trajectory after wall interaction
Background – Current approach
Experiments provide qualitative
information
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 8
• 2 way coupling - transient
• Continuum for both phases
• Surface tracking
Side Splashing
a
w
New Approach
Forward Splashing
b
w
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 9
Model Description
• Incompressible flow
• Multiphase (liquid/gas) - VOF
• URANS (k-e, SST, Spalart-Almaras)
• Large Eddy Simulation (Smagorinsky
subgridscale model)
• Polyhedral mesh
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 10
Model Description
D
4D
3D
50
mm
symmetry
Pressure outlet
wwheel = 25 rad/s
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 11
Results
monitoring point
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 12
Splash – front view
Results
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 13
Splash – top view
Results
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 14
Splash – side view
Results
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 15
Splash - view from underneath
Results
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 16
Conclusion
- Method to predict the tire water splash
- Important parameters: amount, direction, and load
- Good frequency agreement with experiments
- Good qualitative agreement with experiments
- More work is needed for a robust procedure
Global Marketing, Richard Monturo, RMONTURO, Issue Date: 26 June 2011
Page 17
Questions?
