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A Consideration Of Wind Noise Reduction By Air Flow Control
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Sector:
Event:
22nd FISITA Congress
Language:
English
Abstract
The relation between the wind noise level at high speed cruising and the vehicle body shape was studied.
The wind noise level in the vehicle depends on the external aerodynamic noise and the noise isolation characteristic of the weatherstrip, body panel and so on. In order to reduce the wind noise level; the modification of the body shape is an important Batter.
Based on model experiments, it is shown that the aerodynamic noise is generated mainly on the front door windshield glass and its level is effected by the air flow around front pillar.
As the aerodynamic noise is induced by the velocity or pressure fluctuation of air flow, the relationships among the front body shape, the air flow fluctuation and the aerodynamic noise are described analytically.
The results were applied to the improvement of design of the production vehicles.
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Citation
Sadakata, O., Kanamaru, K., and Kakamu, T., "A Consideration Of Wind Noise Reduction By Air Flow Control," SAE Technical Paper 885115, 1988, https://doi.org/10.4271/885115.Also In
References
- Stapleford W.R. Carr G.W. “Aerodynamic Noise in Road Vehicles, Parts I and II.” MIRA Reports 1971/2 and 1972/6 November 1971 May 1972
- Lorea A. et al. A Wind-Tunnel Method for Evaluating the Aerodynamic Noise of Cars SAE Paper 860215
- Buchheim R. et al. Vehicle Interior Noise Related to External Aerodynamics Int. J. of Vehicle Design 3 4 398 410 1982
- Watanabe M. Harita M. Hayashi E. The Effect of Body Shapes on Hind Noise SAE Paper 780266
- Welsh M. C. et al. Flow-Resonant Sound Interaction in A Duct Containing A Plate, Parts I and II Journal of Sound and Vibration 1984, 1986
- Fenech H. Ganz I. Acoustic Excitation of A Square Plate by Turbulent Flow Noise Applied Acoustics 19 1986 167 182
- Howe M. S. “The Influence of Surface Compliance on the Production of Sound by a Turbulent Boundary Layer” Journal of Vibration. Acoustics Stress, and Reliability in Design
- Lorea A. Castelluccio V. et al. “A Wind-Tunnel Method for Evaluating the Aerodynasic Noise of Cars.” SAE 660215
- Hirschel E. H. et al. “Theoretical and experimental boundary-layer studies of car bodies” Int. J. of Vehicle Design 5 5 567 584
- Roos F. W. Kegelman J. T. Control of Coherent Structures in Reattaching Laminar and Turbulent Shear Layers” AIAA Shear Flow Control Conference March 12-14 1985