论文标题
使用应力混合涡流模拟的通用侧视镜的计算空声学
Computational Aeroacoustics of a Generic Side View Mirror using Stress Blended Eddy Simulation
论文作者
论文摘要
本文提出了使用应力混合涡流模拟（SBE）与FFOWCS Williams和Hawkings（FW-H）方程相连的应力混合涡模拟（SBE），该数值研究由安装在平板上的通用侧视镜产生的空气动力学噪声。使用标准化的侧视镜进行了网格评估研究，其雷诺数（re）基于模型的直径为5.2 x10^5。镜子上流体力压力波动的预测，各种麦克风位置发出的声音与先前发布的实验数据非常吻合。此外，我们的数值结果表明，将镜像靠近侧窗口会导致镜子附着在镜子后部的流动，从而在几个接收器位置总体降低了声压水平（SPL）的总体降低。
This paper presents a numerical investigation of aerodynamic noise generated by a generic side-view mirror mounted on a flat plate using the Stress Blended Eddy Simulation (SBES) coupled with the Ffowcs Williams and Hawkings (FW-H) equation. A grid evaluation study was performed using a standardised side-view mirror with a Reynolds Number (Re) of 5.2 x10^5 based on the diameter of the model. The predictions for hydrodynamic pressure fluctuations on the mirror, the window and the sound emitted at various microphone locations are in good agreement with previously published experimental data. In addition, our numerical results indicate that yawing the mirror closer to the side window results in the flow being attached to the rear of the mirror resulting in an overall reduction in Sound Pressure Level (SPL) at several receiver locations.
