控制螺度的气动噪声降噪机理初探
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- 英文论文题名：The fundamental study on controlling aerodynamic noise by helicity control
- 论文作者：杨焱 ; 朱建州
- 英文论文作者：YANG Yan ; ZHU Jian-Zhou ; LHD Institute of Mechanics ; Chinese Academy of Sciences ; Su-Cheng Centre for Fundamental and Interdisciplinary Sciences
- 年：2016
- 作者机构：中国科学院力学研究所高温气体动力学国家重点实验室;南京市高淳区速诚基础与交叉科学研究中心;
- 论文关键词：可压缩湍流 ; 各向同性湍流 ; 直接数值模拟 ; 螺度 ; 气动噪声 ; 流噪声 ; 声源 ; 噪声控制
- 英文论文关键词：compressible isotropic turbulence ; DNS ; helicity control ; aeroacoustics ; flow noise ; noise control mechanisms
- 会议召开时间：2016-11-04
- 会议录名称：2016年度全国气动声学学术会议论文摘要集
- 语种：中文
- 分类号：TB535
- 学会代码：LTLX
- 会议名称：2016年度全国气动声学学术会议
- 会议地点：中国北京
- 主办单位：中国航空学会航空声学专业委员会、中国航空学会气动声学专业委员会、中国商飞上海飞机设计研究院、北京航空航天大学
- 学会名称：北京航空航天大学流体力学教育部重点实验室
- 页数：10
- 文件大小：1673k
- 原文格式：D
- 会议级别：全国
摘要
针对可压缩均匀各向同性湍流的气动声(流噪声),及螺度对其的控制,进行直接数值模拟,考察其基本特性。本文简要描述相关的研究背景,概述理论基本概念,简要介绍数值方法;给出阶段性计算结果和分析。对于衰减均匀各向同性湍流,比较了初始流场为单一手性(螺旋波分解的仅有某一支)与消旋(螺旋波两支能量均分)的直接数值模拟结果,在现有分辨率下,结果获得了直接模拟数据,初步给出了一种螺度控制方式下的声和涡模态竞争的图像。
In order to reveal the fundamental mechanisms on aeroacoustics, aerodynamic or flow noise, of the compressible, isotropic turbulence, and its control by helicity, a series of direct numerical simulation(DNS) were performed.The paper presents the relevant theories and numerical methods and the new results.The comparison on racemic and homochiral cases give the fundamental map of the dynamics of the vertical and sound modes with time.More ways to control the aeroacoustic noise by controlling helicty are to be studied.
In order to reveal the fundamental mechanisms on aeroacoustics, aerodynamic or flow noise, of the compressible, isotropic turbulence, and its control by helicity, a series of direct numerical simulation(DNS) were performed.The paper presents the relevant theories and numerical methods and the new results.The comparison on racemic and homochiral cases give the fundamental map of the dynamics of the vertical and sound modes with time.More ways to control the aeroacoustic noise by controlling helicty are to be studied.
引文
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3.Proudman,I.(1952).The Generation of Noise by Isotropic Turbulence.Proceedings of the Royal Society a:Mat hematical,Physical and Engineering Sciences,214(1116),119-132.
4.Lilley,G.M.(1994).The Radiated Nois e from Isotropic Turbulence.Theoretical and Computational Fluid Dyna mics,6,281-301.
5.傅德薰,马延文,李新亮,王强.可压缩湍流直接数值模拟[M].科学出版社.2010
6.Waleffe,F.(1992).The nature of triad interactions in homogeneous turbulence.Physics of Fluids a:Fluid Dyna mics,4(2),350.
7.李新亮.高超声速湍流直接数值模拟技术[J].航空学报,2015,36(1):147-158
8.Samtaney,R.,Pullin,D.I.,&Kosovic,B.(2001).Direct numerical simulation of decaying compressible turb ulence and shocklet statistics.Physics of Fluids,13(5),1415.
2.Lighthill M J.On sound generated aerodynamically.I.General theory[J].Proceedings of the Royal Society of London.Series A,Mathematical and Physical Sciences.1952,211(1107):564-587.
3.Proudman,I.(1952).The Generation of Noise by Isotropic Turbulence.Proceedings of the Royal Society a:Mat hematical,Physical and Engineering Sciences,214(1116),119-132.
4.Lilley,G.M.(1994).The Radiated Nois e from Isotropic Turbulence.Theoretical and Computational Fluid Dyna mics,6,281-301.
5.傅德薰,马延文,李新亮,王强.可压缩湍流直接数值模拟[M].科学出版社.2010
6.Waleffe,F.(1992).The nature of triad interactions in homogeneous turbulence.Physics of Fluids a:Fluid Dyna mics,4(2),350.
7.李新亮.高超声速湍流直接数值模拟技术[J].航空学报,2015,36(1):147-158
8.Samtaney,R.,Pullin,D.I.,&Kosovic,B.(2001).Direct numerical simulation of decaying compressible turb ulence and shocklet statistics.Physics of Fluids,13(5),1415.