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Comparison of hydrodynamic and acoustic pressure on automotive front side window
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering ( IF 1.7 ) Pub Date : 2021-07-22 , DOI: 10.1177/09544070211034319
Haidong Yuan 1 , Zhigang Yang 2, 3, 4
Affiliation  

The unsteady flow in the front side window region of the vehicle can generate hydrodynamic and acoustic pressure on the front side window, which can influence the interior sound field. The hydrodynamic pressure on the front side window was achieved by the incompressible wall-modeled large-scale eddy simulation (WMLES) or improved delayed detached eddy simulation (IDDES), and the hybrid computational aeroacoustics (CAA) method based on acoustic perturbation equations (APE) was employed to achieve the acoustic pressure on the front side window. The numerical results of both hydrodynamic and acoustic pressure ware validated by the wind tunnel experiment, especially the corrected force analysis technique (CFAT) is employed to validate the acoustic pressure. The comparison of hydrodynamic and acoustic pressure on the front side window was performed by the Dynamic Mode Decomposition (DMD). Results show that the hydrodynamic pressure regionally distributes on the front side window and most energy concentrates on area interacted with the side mirror wake, while the acoustic pressure distributes uniformly on the front side window acting as a diffusion field and the energy disperses in frequency region.



中文翻译:

汽车前窗水动力和声压比较

车辆前窗区域的非定常流动会在前窗上产生流体动力和声学压力,从而影响车内声场。前侧窗上的流体动压力通过不可压缩壁面建模大尺度涡模拟 (WMLES) 或改进的延迟分离涡模拟 (IDDES) 以及基于声扰动方程 (APE) 的混合计算气动声学 (CAA) 方法实现) 用于实现前侧窗上的声压。通过风洞实验验证了流体动力和声压的数值结果,特别是采用校正力分析技术(CFAT)对声压进行了验证。通过动态模式分解 (DMD) 对前侧窗上的流体动力和声压进行比较。结果表明,流体动压在前窗区域分布,大部分能量集中在与侧镜尾流相互作用的区域,而声压在作为扩散场的前窗上均匀分布,能量在频率区域分散。

更新日期:2021-07-22
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