可压缩混合层的湍流噪声与时空关联

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	可压缩混合层的湍流噪声与时空关联
	李栋; 郭力; 张星; 何国威
Source Publication	第七届全国流体力学学术会议论文摘要集
	2012
Pages	19-19
Conference Name	第七届全国流体力学学术会议
Conference Date	2012-11-12
Conference Place	中国广西桂林
Abstract	本文通过直接数值模拟研究了三维可压缩混合层产生的噪声及脉动速度的时空关联。发现空间发展混合层产生的噪声强度具有明显的方向性,结合流场显示可以发现大尺度涡结构演化形成的高强度声波。本文进一步计算了混合层速度的时空自关联函数,并与实验数据对比,证实了流向和法向速度的时空关联具有明显的不同的拉伸方向。为进一步研究流场和声场的关系,我们还根据Lighthill声学比拟理论,得到了声源的分布,并结合流场显示,比较了Lighthill应力张量各项对声源的贡献。
Keyword	时空关联可压缩混合层湍流噪声直接数值模拟
Department	LNM湍流
Language	中文
Document Type	会议论文
Identifier	http://dspace.imech.ac.cn/handle/311007/48609
Collection	非线性力学国家重点实验室
Recommended Citation GB/T 7714	李栋,郭力,张星,等. 可压缩混合层的湍流噪声与时空关联[C]第七届全国流体力学学术会议论文摘要集,2012:19-19.

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