传声器风噪声和防风罩降噪性能仿真研究
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- 英文论文题名：Simulation study of microphone wind noise and wind noise reduction performance of windscreen
- 论文作者：郭琴 ; 邱小军
- 英文论文作者：GUO Qin ; QIU Xiao-jun ; Institute of Acoustics ; Nanjing University ; Faculty of Engineering and Information Technology ; University of Technology Sydney
- 年：2016
- 作者机构：南京大学声学研究所,教育部近代声学重点实验室;悉尼科技大学,音频声学振动研究中心,工程与信息技术学部;
- 论文关键词：气动声学 ; 风噪声 ; 防风罩
- 英文论文关键词：aeroacoustics ; wind noise ; windscreen
- 会议召开时间：2016-10-28
- 会议录名称：2016年全国声学学术会议论文集
- 语种：中文
- 分类号：TB53
- 学会代码：OGSM
- 会议名称：2016年全国声学学术会议
- 会议地点：中国湖北武汉
- 主办单位：中国声学学会
- 学会名称：中国声学学会
- 页数：4
- 文件大小：483k
- 原文格式：D
- 会议级别：全国
摘要
以计算流体力学与计算气动声学理论为基础,对传声器风噪声和防风罩的降噪性能进行预测。通过划分高精度的双圆柱模型网格,采用大涡模拟法,建立了传声器湍流噪声的预测方法。应用该方法分别仿真风速5 m/s、10 m/s和20 m/s时的风噪声,并探讨60 mm、90 mm和175 mm三种直径的球形防风罩的降噪作用,根据仿真结果分析防风罩尺寸、孔径等参数对降噪性能的影响。结果表明:随着风速增大,风噪声随之升高;防风罩的引入可以有效降低风噪声,175 mm防风罩表现出更好的降噪效果;对于20 Hz的低频,大孔径的防风罩的降噪性能更好。
The computational fluid dynamics techniques and computational aeroacoustics are used to predict the wind noise on microphone and the wind noise reduction provided by different windscreens. A method is developed to predict the turbulent wind noise based on a two-cylinder model with high quality grid and large eddy simulations. With this model, the wind noise level is calculated with different flow speed(5 m/s, 10 m/s and 20 m/s), and the effects of three different sizes of windscreens(60 mm, 90 mm and 175 mm) on wind noise reduction are studied. According to the simulation results, the wind noise increases with the flow speed increases and the windscreens are effective in wind noise reduction, especially the windscreen with a diameter of 175 mm. At frequency lower than 20 Hz, the windscreen with larger pore radius is more effective.
The computational fluid dynamics techniques and computational aeroacoustics are used to predict the wind noise on microphone and the wind noise reduction provided by different windscreens. A method is developed to predict the turbulent wind noise based on a two-cylinder model with high quality grid and large eddy simulations. With this model, the wind noise level is calculated with different flow speed(5 m/s, 10 m/s and 20 m/s), and the effects of three different sizes of windscreens(60 mm, 90 mm and 175 mm) on wind noise reduction are studied. According to the simulation results, the wind noise increases with the flow speed increases and the windscreens are effective in wind noise reduction, especially the windscreen with a diameter of 175 mm. At frequency lower than 20 Hz, the windscreen with larger pore radius is more effective.
引文
[1]Van den Berg G P.Wind-induced noise in a screened microphone[J].The Journal of the Acoustical Society of America,2006,119(2):824-833.
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[3]Zheng Z C,Tan B K.Reynolds number effects on flow/acoustic mechanisms in spherical windscreens[J].The Journal of the Acoustical Society of America,2003,113(1):161-166.
[4]Leclercq D,Cooper J,Stead M.The use of microphone windshields for outdoor noise measurements[C].Proceedings of Acoustics 2008,Geelong,Australia,24-26 November 2008.
[5]Strasberg M.Dimensional analysis of windscreen noise[J].The Journal of the Acoustical Society of America,1988,83(2):544-548.
[6]Xu Y,Zheng Z C,Wilson D K.A computational study of the effect of windscreen shape and flow resistivity on turbulent wind noise reduction[J].The Journal of the Acoustical Society of America,2011,129(4):1740-1747.
[7]Wang Y,Brannock M,Cox S,et al.CFD simulations of membrane filtration zone in a submerged hollow fiber membrane bioreactor using a porous media approach[J].Journal of Membrane Science,2010,363(1):57-66.
[8]Cookson E J.Development of the Metal Foam Electrical Resistance Heater.Master of Science,North Carolina State University,2003.
[9]Berg A.Numerical and experimental study of the fluid flow in porous medium in charging process of stratified thermal storage tank.Diss.KTH Industrial Engineering and Management,2013
[10]Van den Berg G P.The sound of high winds:the effect of atmospheric stability on wind turbine sound and microphone noise.Diss.University of Groningen,2006.
[11]Hessler G F,Hessler D M,Bay K.Experimental study to determine wind-induced noise and windscreen attenuation effects on microphone response for environmental wind turbine and other applications[J].Noise Control Engineering Journal,2008,56(4):300-309.
[2]Morgan S,Raspet R.Investigation of the mechanisms of low‐frequency wind noise generation outdoors[J].The Journal of the Acoustical Society of America,1992,92(2):1180-1183.
[3]Zheng Z C,Tan B K.Reynolds number effects on flow/acoustic mechanisms in spherical windscreens[J].The Journal of the Acoustical Society of America,2003,113(1):161-166.
[4]Leclercq D,Cooper J,Stead M.The use of microphone windshields for outdoor noise measurements[C].Proceedings of Acoustics 2008,Geelong,Australia,24-26 November 2008.
[5]Strasberg M.Dimensional analysis of windscreen noise[J].The Journal of the Acoustical Society of America,1988,83(2):544-548.
[6]Xu Y,Zheng Z C,Wilson D K.A computational study of the effect of windscreen shape and flow resistivity on turbulent wind noise reduction[J].The Journal of the Acoustical Society of America,2011,129(4):1740-1747.
[7]Wang Y,Brannock M,Cox S,et al.CFD simulations of membrane filtration zone in a submerged hollow fiber membrane bioreactor using a porous media approach[J].Journal of Membrane Science,2010,363(1):57-66.
[8]Cookson E J.Development of the Metal Foam Electrical Resistance Heater.Master of Science,North Carolina State University,2003.
[9]Berg A.Numerical and experimental study of the fluid flow in porous medium in charging process of stratified thermal storage tank.Diss.KTH Industrial Engineering and Management,2013
[10]Van den Berg G P.The sound of high winds:the effect of atmospheric stability on wind turbine sound and microphone noise.Diss.University of Groningen,2006.
[11]Hessler G F,Hessler D M,Bay K.Experimental study to determine wind-induced noise and windscreen attenuation effects on microphone response for environmental wind turbine and other applications[J].Noise Control Engineering Journal,2008,56(4):300-309.