文献类型：期刊文献

中文题名：空腔流动的大涡模拟及气动噪声控制

英文题名：LARGE-EDDY SIMULATION AND CONTROLLING OF NOISE IN CAVITY

作者：赖焕新[1];周邵萍[1];苏永升[1];邢改兰[1];罗开红[2]

机构：[1]华东理工大学机械与动力工程学院承压系统安全科学教育部重点实验室,上海200237;[2]School of Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK

年份：2008

卷号：29

期号：2

起止页码：228

中文期刊名：工程热物理学报

外文期刊名：Journal of Engineering Thermophysics

收录：CSTPCD;;EI(收录号：20081111146661);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市科委浦江人才计划项目(No．07PJ14025);高等学校博士学科点专项基金项目(No．20070251017);上海市重点学科建设项目(No．B503)资助．

语种：中文

中文关键词：空腔;噪声控制;多孔壁板;大涡模拟;声学比拟

外文关键词：cavity; noise control; porous structure; large eddy simulation; acoustic analogy

摘要：大涡模拟(LES)和三维的Ffowcs Williams-Hawkings声学比拟方法相结合,研究空腔过流的一种噪声控制措施.空腔的底板/后墙使用多孔壁板,因此流体可以穿透空腔壁面,多孔效果使用Darcy压力-速度关系模拟.声源流场由LES计算,声辐射和远声场由声学比拟获得。结果表明,这种措施有效地减弱了空腔内的压力脉动和远场声辐射,低频脉动Rossiter模数对应的波动幅值被有效抑制,声源中偶极子占优项大幅度减小,从而抑制了声辐射.
The sound controlling technique using porous inserts in an open cavity is tested numerically. Large eddy simulation （LES） combined with a three-dimensional Ffowcs Williams-Hawkings （FW-H） acoustic analogy is employed. The Darcy pressure - velocity law is applied to conceptually mimic the effect of porous media placed on the cavity floor and/or rear wall. As a result, flow in the cavity could locally move in or out through these porous walls. The numerical results show that applying the porous media on cavity floor and/or rear wall could decrease the pressure fluctuations in the cavity and the sound pressure level in the far field. The amplitudes of the Rossiter modes are suppressed while the dominant sound sources （the transverse dipole terms） are significantly reduced. As a result, the sound pressure in the far field is also suppressed.