Effect of incoming boundary layer on cavity buffeting noise

被引：0
|
作者：
Hu X.-J. [1 ]
Zhang Y.-H. [1 ]
Dong C.-B. [1 ]
Sun X.-Z. [1 ]
Wang J.-Y. [1 ]
Sang T. [1 ]
机构：
[1] State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2020年 / 50卷 / 04期
关键词：
Boundary layer; Buffeting noise; Large eddy simulation (LES); Simple cavity;
D O I：
10.13229/j.cnki.jdxbgxb20190812
中图分类号：
学科分类号：
摘要：
The computational fluid dynamics software STAR-CCM+ and the DSLM subgrid-scale model were used to study the mechanism of buffeting noise based on the simple cavity. The correctness of the simulation method is verified by comparing with the experimental data, and the effect of different incoming boundary layer shape and thickness on cavity buffeting noise is analyzed. The results show that the cavity buffeting noise is related to the shear layer oscillating and periodic vortex shedding of the cavity opening. The cavity buffeting noise is the result of the interaction of the acoustic feedback mechanism and the resonance mechanism. The cavity buffeting noise can be reduced through changing the boundary layer shape from laminar to turbulent or increasing the thickness of the boundary layer, which changes the stability of the free shear layer oscillation and the development and motion of the vortex of the cavity opening. These measures can weaken the acoustic feedback effect or make the vortex frequency away from the resonance frequency to reduce the cavity buffeting noise. © 2020, Jilin University Press. All right reserved.
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页码：1169 / 1182
页数：13
相关论文
共 22 条
  • [1] Yang Zhen-dong, Comprehensive study of characteristics and passive control methods of vehicle buffeting noise, (2016)
  • [2] Shieh C M., Parallel numerical simulations of subsonic, turbulent, flow-induced noise from two and three dimensional cavities using computational aeroacoustics, (2000)
  • [3] Rossiter J., Wind tunnel experiments on the flow over rectangular cavities at subsonic and transonic speeds, royal aircraft establishment, RAE Report
  • [4] Wang Yi-ping, Comprehensive study of generation mechanism and reduction methods of vehicle wind rush noise and buffeting noise, (2011)
  • [5] Aspinall D T., An empirical investigation of low frequency wind noise in motor cars, (1966)
  • [6] Nelson P A, Halliwell N A, Doak P E., Fluid dynamics of a flow excited resonance part ii: flow acoustic interaction, Journal of Sound and Vibration, 91, 3, pp. 375-402, (1983)
  • [7] An C F, Alaie S M, Sovani S D, Et al., Side window buffeting characteristics of an SUV
  • [8] An C F, Puskarz M, Singh K, Et al., Attempts for reduction of rear window buffeting using CFD
  • [9] An C F, Singh K., Optimization study for sunroof buffeting reduction
  • [10] An C F, Singh K., Sunroof buffeting suppression using a dividing bar
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