文献类型：期刊文献

中文题名：亚音速圆口喷流的大涡模拟

英文题名：Large Eddy Simulation of Subsonic Round Jet

作者：林健[1];赖焕新[1]

机构：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237

年份：2016

卷号：42

期号：5

起止页码：715

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金(51576067)

语种：中文

中文关键词：亚音速;喷管喷流;大涡模拟;剪切层;相关性分析

外文关键词：subsonic; jet flow; large eddy simulation; shear layer; correlation analysis

摘要：采用大涡模拟方法研究了马赫数M=0.75,雷诺数Re=50 000的圆口可压缩喷流问题。在与实验数据比对验证的基础上,分析了喷流剪切层不稳定性发展的两个主要阶段,着重考察了剪切层中轴向速度脉动u'、径向速度脉动v'、压力脉动p'在空间任意两点上的时空相关系数随时间和空间发展分布的特点,并由此分析剪切层中旋涡脉动的迁移特性,为进一步研究与控制喷流噪声提供基础。
A compressible round jet is investigated by large eddy simulation. The jet Mach number is 0. 75 and the Reynolds number is 50 000. Numerical results are validated by available experimental data. Two major stages for the shear layer instability development are observed and analyzed. After this, two- point space-time correlations of axial velocity fluctuation u＇ , radial velocity fluctuation v＇ and pressure fluctuation p＇ in the shear layer are investigated. Their distribution and evolution in time and space are presented and discussed. The migration characteristics of vortices are analyzed. The study provides a base for further investigation and controlling of jet noise.