This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Unique Correlation Technique For Real-World Flow Simulation in the Wind Tunnel
Annotation ability available
Sector:
Language:
English
Abstract
An unique approach has been developed to simulate the real world flow condition in an indoor laboratory environment. An attempt has been made in this investigation to generate a velocity profile in front of the vehicle in a wind tunnel environment similar to the one existing in the outdoor driving condition. In order to establish this correlation several test vehicles from Ford car and truck vehicle lines were tested on the track to obtain representative real world road data. The same vehicles were tested in the Ford Motor's full scale wind tunnels. In each case, the frontal velocity profiles were determined using the same instrumentation as in the case of outdoor environment. This reference road data was then used to correlate with the frontal profile obtained in the wind tunnels. Based on the correlation analysis, a mathematical relationship was developed to represent the blockage correction in each wind tunnel as a function of the car frontal area and the distance from the base of the windshield to the nozzle exit plane. These blockage factor relationships were then implemented in the wind tunnel test system control software to establish a wind speed that corresponds to the track speeds. Implementation of this technique allowed us to achieve in Ford Motor's wind tunnels an identical velocity profile to the real world flow condition. Finally, tests were conducted to verify the accuracy of the correlation procedure by comparing the velocity profiles for different vehicles at different locations in the test sections of the wind tunnel with that obtained on the track.
Recommended Content
Authors
Topic
Citation
Rout, R., "Unique Correlation Technique For Real-World Flow Simulation in the Wind Tunnel," SAE Technical Paper 980033, 1998, https://doi.org/10.4271/980033.Also In
References
- Mercker E. Wiedemann J On the Correction Of Interference Effects in Open Jet Wind Tunnels SAE Technical Paper 960671 1996
- Kunster R. Deutenbach K. R. Vagt JD. Measurement of Reference Dynamic Pressure in Open Jet Automotive Wind Tunnels SAE Technical Paper 920344 1992
- Aerodynamic Testing Of Road Vehicles SAE Surface Vehicle- Information Report J2071 MAR 90
- Buchheim R. Comparison Test Between Major.European. Automotive Wind Tunnels SAE-Paper 800140 1980
- Buchheim R. Comparison Test Between Major European and North American Wind Tunnels SAE - Paper 830801 1983