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Airflow Parameters Near the Differential of a Rear Drive Passenger Car
Technical Paper
2001-01-1015
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
The paper presents experimental analysis of the airflow around the differential center housing of a rear drive full-scale passenger car. The study included investigation of local airflow total and static pressure, as well as surface flow visualization. Estimation of the local airflow velocity is based on the measured pressure coefficients. The experiments were carried out at different test facilities: in a climatic wind tunnel, in a full-scale wind tunnel and on-road. Influence of side wind was modeled by the yawing of the car in the full-scale wind tunnel.
The results show the asymmetrical structure of the flow in both, vertical and horizontal planes. Estimated longitudinal relative local velocity decreases from maximum Vr ≈ 0.4 at the lower surface of the center housing, to about Vr ≈ 0 above the upper surface. Side wind increases airflow velocity around the center housing within the investigated yaw range ± 20°
Authors
Topic
Citation
Mardiyants, S. and Watkins, S., "Airflow Parameters Near the Differential of a Rear Drive Passenger Car," SAE Technical Paper 2001-01-1015, 2001, https://doi.org/10.4271/2001-01-1015.Also In
References
- Gallopoulos, N.E. “Temperature of Fluids in Passenger Car Power Trains” SAE Paper 740307
- Mardiyants S. Watkins S. “Experimental Investigation of Underbody Heat Transfer Characteristics” RMIT Research Report WTP 0198 Melbourne 1998
- Bryer D.W. Pankhurst R.C. “Pressure-Probe Methods for Determining Wind Speed and Flow Direction” Her Majesty's Stationary Office, (NPL) London 1971