光滑圆柱风噪声的降噪措施研究  

Denoising measures against aeolian noise of smooth circular cylinders

作　　者：沈国辉[1] 张扬[1] 郑翀 宋刚[3] 王轶文[3] SHEN Guohui;ZHANG Yang;ZHENG Chong;SONG Gang;WANG Yiwen(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Wenzhou Electric Power Corporation,State Grid,Wenzhou 325000,China;Zhejiang Provincial Electric Power Design Inst让ute Co,Ltd,Hangzhou 310012,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]国家电网温州供电公司,浙江温州325000 [3]浙江省电力设计院有限公司,杭州310012

出　　处：《振动与冲击》2020年第23期52-57,共6页Journal of Vibration and Shock

基　　金：国家自然基金(51838012);浙江省自然科学基金(Y16E080016)。

摘　　要：为了降低光滑圆柱的风噪声,进行了多种降噪措施的系统研究,采用声学风洞试验获得光滑圆柱的风噪声特征,对三种抑噪措施即绕螺旋线、节径突出和添加轴向附加线开展多组参数的降噪效果测试,对比添加抑噪措施前后圆柱的风噪声频谱和A计权总声压级,最后总结提出光滑圆柱降噪措施的建议。结果表明:圆柱风噪声的卓越频率随着风速的增大而呈线性增大,卓越频率反算的斯托拉哈数为0.197~0.200;对于光滑圆柱的抑噪措施,缠绕扰流线的降噪效果最好,添加节径突起次之,沿轴向添加附加线的降噪效果最差,甚至出现了增大风噪声的情况;对于直径24 mm左右的光滑圆柱,建议采用单根直径4 mm的圆形扰流线、10 cm的间距布置,若采用两根扰流线并列布置可获得更好的降噪效果。In order to reduce aeolian noise of smooth circular cylinders, multiple denoising measures were systematically studied. Aeolian noise characteristics of smooth circular cylinders were obtained with acoustic wind tunnel tests. Three kinds of noise suppression measures including winding spiral, protruding pitch diameter and adding axial additional line were tested for noise reduction effect of multiple groups of parameters. Wind noise spectrum and A-weighted total sound pressure level of cylinder before and after adding noise suppression measures were compared. Finally, suggestions for noise reduction measures of smooth cylinder were proposed. Results showed that the predominant frequency of cylindrical wind noise increases linearly with increase in wind speed, Strouhal number of inverse calculation of predominant frequency is 0.197-0.200;for noise suppression measures of smooth cylinder, the noise reduction effect of winding disturbing streamline is the best, followed by that of adding pitch protrusion, and the noise reduction effect of adding additional line along axial direction is the worst, and even wind noise increases;for smooth cylinder with diameter of about 24 mm, it is recommended to use a single circular spoiler with diameter of 4 mm and a spacing of 10 cm;if two disturbing streamlines are arranged side by side, better noise reduction effect can be obtained.

关 键 词：光滑圆柱 风噪声 声学风洞 风洞试验 抑噪措施 

分 类 号：TU312.1[建筑科学—结构工程]