Browse Publications Technical Papers 2002-01-3335
2002-12-02

Wake Studies of a Model Passenger Car Using PIV 2002-01-3335

Detailed wake surveys were performed with a 1/8th scale model, hatchback car in a low-speed, wind tunnel. The tests were conducted at a freestream velocity of 20m.s-1 giving a Reynolds number of 6.0 ×105 based on the model length. PIV was used to obtain cross-flow velocities at four wake survey locations. At one wake position the effect of hatchback geometry was investigated. Using a wake integration technique, lift and induced drag distributions along the model width, total lift and induced drag acting on the model were obtained using flow field data. The induced lift and drag coefficients were found to decrease downstream of the model due to viscous dissipation. A hatchback angle of 30° was found to produce the greatest induced drag. The instantaneous wake structure of hatchback cars was found to be asymmetric and was not adequately described as consisting of counter-rotating C-post vortices, a concept produced by earlier time averaged data obtained elsewhere.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Parametric Study of Wake Structures and Forces of RectangularBodies with Radiused Edges Near a Plane Surface

2000-01-0490

View Details

TECHNICAL PAPER

The Effect of Rear Slant Angle on Vehicle Wakes and Implications for Platoons

2006-01-0341

View Details

TECHNICAL PAPER

The Chrysler 3/8-Scale Pilot Wind Tunnel

940416

View Details

X