基于POD降阶模型的近场气动噪声研究  

Study of near-field aeroacoustics based on POD reduced-order model

作　　者：齐健 路宽 李立州 张光鹏 李文超[1] 杜帅奎 Qi Jian;Lu Kuan;Li Lizhou;Zhang Guangpeng;Li Wenchao;Du Shuaikui(School of Aerospace Engineering,North University of China,Shanxi Taiyuan,030051,China)

机构地区：[1]中北大学航空宇航学院,山西太原030051

出　　处：《机械设计与制造工程》2023年第12期69-74,共6页Machine Design and Manufacturing Engineering

基　　金：国家自然科学基金(面上)项目(51775518);山西省基础研究计划(20210302124010)。

摘　　要：以单圆柱绕流为研究对象,研究了基于流场瞬态压力脉动进行流场重构的POD方法;探讨了模态阶数对POD重构流场不同位置噪声精度的影响;提出了一种利用单圆柱绕流气动噪声POD模型叠加快速计算双圆柱绕流气动噪声的方法。结果表明:非尾流区和尾流区都可以采用POD方法重构,增加模态阶数可以提高POD重构流场噪声的精度;在相同模态阶数下,POD重构流场噪声在非尾流区的精度比在尾流区高;快速计算气动噪声的方法是可行的。The POD method of flow field reconstruction based on the transient pressure pulsation of the flow field is investigated;the influence of the modal order on the noise accuracy of different positions of the POD reconstructed flow field is discussed;a method of fast calculation of the aerodynamic noise of double-cylindrical winding using the superposition of the POD model of the aerodynamic noise of single-cylindrical winding is proposed.The results of the study show that:the POD method can be used to reconstruct both the non-wake and wake regions,and the accuracy of the POD reconstructed flow field noise can be improved by increasing the modal order;under the same modal order,the accuracy of the POD reconstructed flow field noise in the non-wake region is higher than that in the wake region;the method of fast calculation of aeroacoustics is feasible.

关 键 词：气动噪声 大涡模拟 本征正交分解 

分 类 号：O354[理学—流体力学]