Title: Aerodynamic study of Jeff Gordons NASCAR 2000
1Aerodynamic study of Jeff Gordons NASCAR 2000
Christina Koehly Michael Schneider Internship
Students from Germany
Berufsakademie (University of Cooperative
Education) Karlsruhe, Mannheim, Germany
Indiana University - Purdue University
Indianapolis, USA
Faculty Advisor Professor H. U. Akay
Department of Mechanical Engineering, IUPUI
March 2001
2Jeff Gordons NASCAR
(BRICKYARD 400, AUGUST 5th 2000)
3Indianapolis Motor Speedway
4Project Objective
- Use Finite Element code ANSYS/FLOTRAN and Finite
Volume code StarCD - Examination of aerodynamic behavior
- Comparison of Velocity Magnitude and Static
Pressure - Decision of which program give better results
5THE PROJECT TEAM AT WORK!
6Theory Assumptions
- Incompressible Fluid
- Adiabatic Conditions
- Steady State
- Newtonian Fluid
- Turbulent Model
7ANSYS/FLOTRAN and StarCD Procedure
- Define the problem
- Define Keypoints
- Make Areas from Keypoints
- Create the Finite Element Mesh
- Set Boundary Conditions
- Set Solver Parameters
- Get the results
8Areas
9Meshes
10Boundary Conditions
- All Boundary Conditions were applied to lines
- Velocity applied to surface of the car
- Velocity of 35 m/s, 70 m/s and 100 m/s applied in
x-direction to inlet and lower free stream
surface - Relative Pressure of 0 Pa applied to outlet
11Parameters
- Steady-state with turbulent solver
- Fluid properties set to air in standard SI
- Solver set to perform more than 500 iterations
12RESULTS
13Velocity Magnitude 35 m/s
StarCD Velocity by 35 m/s
ANSYS Velocity by 35 m/s
14Velocity Magnitude 70 m/s
ANSYS Velocity by 70 m/s
StarCD Velocity by 70 m/s
15Velocity Magnitude 100 m/s
StarCD Velocity by 100 m/s
ANSYS Velocity by 100 m/s
16Static Pressure 35 m/s
StarCD Pressure by 35 m/s
ANSYS Pressure by 35 m/s
17Static Pressure 70 m/s
StarCD Pressure by 70 m/s
ANSYS Pressure by 70 m/s
18Static Pressure 100 m/s
StarCD Pressure by 100 m/s
ANSYS Pressure by 100 m/s
19Conclusion
- Both programs are good to solve these problems
- For easy geometries ANSYS/FLOTRAN should be used
to get fast results - For complex geometries StarCD gives more
reasonable results, but it takes more time to
define the boundary conditions
20THE END!