Wind-buffeting noise characteristics of simple cavity model based on nonlinear LRN/DES turbulence model
Wind-buffeting noise characteristics of simple cavity model based on nonlinear LRN/DES turbulence model
复制标题
DOI：
10.1080/10407782.2022.2102400
复制
发表时间：
2022-08
期刊：
影响因子：
--
通讯作者：
Yi Yang;Ledian Zheng
中科院分区：
文献类型：
--
作者：
Yi Yang;Ledian Zheng
本文通过引入非线性雷诺应力和尺度分辨率模拟方法，提出了一种非线性LRN/DES湍流模型，解决了现有湍流模型在风抖振噪声模拟中计算成本与精度之间的矛盾。通过后向阶跃流验证模型的可行性后，基于简单空腔模型进行了风抖振噪声仿真。通过与风抖振噪声仿真中常用的几种湍流模型和实验结果进行比较，发现非线性LRN/DES模型对简单空腔模型的风抖振噪声频率和声压级的模拟最为准确，对流场的捕捉也最接近实验结果。
Abstract In this article, a nonlinear LRN/DES turbulence model is proposed by introducing nonlinear Reynolds stress and scale resolution simulation methods to address the contradiction between computational cost and accuracy of existing turbulence models in wind buffeting noise simulations. After verifying the feasibility of the model by backward-facing step flow, wind buffeting noise simulation is carried out based on the simple cavity model. By comparing with several turbulence models commonly used in wind buffeting noise simulation and experimental results, it is found that the nonlinear LRN/DES model simulates the frequency and sound pressure level of wind buffeting noise of the simple cavity model most accurately, and the capture of the flow field is also closest to the experimental result.