近壁面对圆柱涡脱落纯音噪声影响研究  

Investigation on Vortex Shedding Noise by Wall Bounded Cylinder

作　　者：徐亮 郭昊[2] 徐康乐[1] 陈震宇 Xu Liang;Guo Hao;Xu Kangle;Chen Zhenyui(COMAC Shanghai Aircraft Design&Research Institute,Shanghai 201210,China;School of Aeronautics Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]中国商飞上海飞机设计研究院,上海201210 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《气动研究与试验》2024年第4期104-110,共7页Aerodynamic Research & Experiment

摘　　要：通过气动噪声风洞试验及数值模拟的方式,研究近壁面对圆柱涡脱落纯音噪声的影响。风洞试验过程中,圆柱直径D为10mm、15mm、20mm,圆柱下缘与平板之间的间隙值G为1mm、3mm、5mm、7mm,来流速度为30m/s、40m/s、50m/s、60m/s,间隙比(G/D)范围为0.05~0.7。对比分析了不同间隙比(G/D)下的气动噪声试验结果。结合数值模拟得到的流场结果,分析了不同间隙比下气动噪声试验结果与流动现象的联系,发现G/D<0.1时,圆柱的周期性涡脱落现象以及纯音均被完全抑制;0.10.3时,圆柱的周期性涡脱落现象基本不受壁面干扰,对应的纯音噪声的频率和强度也与自由圆柱绕流类似。The paper has an investigation on vortex shedding noise by wall bounded cylinder through acoustic wind tunnel and numerical simulation.In wind tunnel test,the diameter of the cylinder is 10mm,15mm,20mm,the gap between lower cylinder edge and wall is from 1mm to 7mm with interval of 2mm,free stream velocity is from 30m/s to 60m/s with interval of 10m/s,the ratio of gap to diameter(G/D)is from 0.05 to 0.7.Combined with numerical simulation results and wind tunnel results,three conclusions can be found according to different G/D ratio.Firstly,when G/D<0.1,periodic vortex shedding phenomenon and tonal noise by cylinder are completely suppressed.Secondly,when 0.1<G/D<0.3,periodic vortex shedding phenomenon is stll disturbed by wall surface effect,moreover,the intensity and frequency of the tone is still lower than that measure from free cylinder flow around.Finally,when G/D>0.3,the disturbs to periodic vortex shedding phenomenon by wall surface effect is negligible and the tone is also similar to that measured from free cylindrical flow.

关 键 词：近壁面 圆柱 涡脱落纯音 间隙比 风洞试验 数值模拟 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]