Aerodynamically induced interior noise in passenger cars is investigated. Surface pressures and resulting interior noise were measured on a full-scale automobile in wind tunnel tests. Interior noise predictions based on theoretical interrelations were compared to measured data. It is concluded that high surface pressure originating even from highly localized flow separations on the car body tends to dominate interior noise. Farfield noise radiation from exterior flow/car-body interaction was studied and results show that a noise level reduction of 4 dB is possible.
Significance of Unsteady Surface Pressures for Aerodynamically Induced Interior Noise of Automobiles
1983
130 pages
Report
No indication
English
Aerodynamically Induced Passenger-Car Interior Noise - Sources and Reduction Concepts
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