{"title":"基于大涡模拟和Ffowcs williams - hawkins方程的气动声学预测","authors":"Zhang, Yufei, Xiao, Yang, Liu, Ruihuan, Chen, Haixin","doi":"10.1186/s42774-022-00112-2","DOIUrl":null,"url":null,"abstract":"A hybrid noise computation method is presented in this paper. Large-eddy simulation with wall-model equation is proposed to compute the flow field. With a stress-balanced wall-model equation, the near-wall computation cost of large eddy simulation was effectively reduced. The instantaneous flow variables obtained by the large-eddy simulation were used to compute the noise source terms of the Ffowcs Williams–Hawkings equation. The present method was investigated with two test cases: a single cylinder at Re = 10,000 and a rod-airfoil at Re = 480,000. The flow quantities and aeroacoustic characteristics were compared with the reference data. The mean velocity profiles and spectra of the flow fluctuations were consistent with data from the literature. When compared with the reference data, the noise computation error was less than 3 dB. The computation results demonstrate the present wall-modeled large eddy simulation is efficient for the noise computation of complex vortex shedding flows.","PeriodicalId":33737,"journal":{"name":"Advances in Aerodynamics","volume":"123 2","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Aeroacoustic prediction based on large-eddy simulation and the Ffowcs Williams–Hawkings equation\",\"authors\":\"Zhang, Yufei, Xiao, Yang, Liu, Ruihuan, Chen, Haixin\",\"doi\":\"10.1186/s42774-022-00112-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A hybrid noise computation method is presented in this paper. Large-eddy simulation with wall-model equation is proposed to compute the flow field. With a stress-balanced wall-model equation, the near-wall computation cost of large eddy simulation was effectively reduced. The instantaneous flow variables obtained by the large-eddy simulation were used to compute the noise source terms of the Ffowcs Williams–Hawkings equation. The present method was investigated with two test cases: a single cylinder at Re = 10,000 and a rod-airfoil at Re = 480,000. The flow quantities and aeroacoustic characteristics were compared with the reference data. The mean velocity profiles and spectra of the flow fluctuations were consistent with data from the literature. When compared with the reference data, the noise computation error was less than 3 dB. The computation results demonstrate the present wall-modeled large eddy simulation is efficient for the noise computation of complex vortex shedding flows.\",\"PeriodicalId\":33737,\"journal\":{\"name\":\"Advances in Aerodynamics\",\"volume\":\"123 2\",\"pages\":\"\"},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2022-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in Aerodynamics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1186/s42774-022-00112-2\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Aerodynamics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1186/s42774-022-00112-2","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 3
摘要
本文提出了一种混合噪声计算方法。提出用壁型方程进行大涡模拟来计算流场。利用应力平衡壁面模型方程，有效降低了大涡近壁模拟的计算成本。利用大涡模拟得到的瞬时流动变量，计算了Ffowcs williams - hawkins方程的噪声源项。目前的方法是调查与两个测试案例:一个单缸在Re = 10,000和一个杆翼型在Re = 480,000。并与参考数据进行了流量和气动声学特性的比较。流动波动的平均速度分布和谱与文献数据一致。与参考数据相比，噪声计算误差小于3 dB。计算结果表明，本文提出的壁面大涡模拟方法对于复杂旋涡脱落流的噪声计算是有效的。
Aeroacoustic prediction based on large-eddy simulation and the Ffowcs Williams–Hawkings equation
A hybrid noise computation method is presented in this paper. Large-eddy simulation with wall-model equation is proposed to compute the flow field. With a stress-balanced wall-model equation, the near-wall computation cost of large eddy simulation was effectively reduced. The instantaneous flow variables obtained by the large-eddy simulation were used to compute the noise source terms of the Ffowcs Williams–Hawkings equation. The present method was investigated with two test cases: a single cylinder at Re = 10,000 and a rod-airfoil at Re = 480,000. The flow quantities and aeroacoustic characteristics were compared with the reference data. The mean velocity profiles and spectra of the flow fluctuations were consistent with data from the literature. When compared with the reference data, the noise computation error was less than 3 dB. The computation results demonstrate the present wall-modeled large eddy simulation is efficient for the noise computation of complex vortex shedding flows.
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