软性多孔材料圆柱降噪特性实验研究  

Study on noise reduction of low speed cavity by acoustic liner

作　　者：武天皓 郭昊[1] 陈旭[1] 刘沛清[1] WU Tianhao;GUO Hao;CHEN Xu;LIU Peiqing(Lu Shi Jia Laboratory,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学陆士嘉实验室(航空气动声学工业和信息化部重点实验室),北京100191

出　　处：《民用飞机设计与研究》2022年第1期77-82,共6页Civil Aircraft Design & Research

基　　金：国家自然科学基金(12072016,11772033,1217021666和11721202)。

摘　　要：由钝体绕流产生的气动噪声可以通过在物体表面覆盖软性多孔材料得到降低。为了证实这种方法的有效性,在北京航空航天大学D5气动声学风洞中,对不同直径圆柱表面覆盖软性多孔材料,在不同风速范围下开展了气动声学测量实验,并利用恒温热线测速仪对其后缘尾迹流场进行了测量。结果显示,通过在圆柱表面覆盖软性材料,可以降低由圆柱产生的气动噪声,流场结果表明软性材料延长了圆柱后缘尾迹,抑制圆柱后缘涡脱落。The aerodynamic noise generated by the flow around a bluff body can be reduced by covering the surface of the object with soft porous materials.In order to verify the effectiveness of this method,aeroacoustic measurement experiments were carried out in the D5 aeroacoustic wind tunnel of Beihang University,covering the surface of cylinders with different soft porous materials under different wind speeds.The results show that the aerodynamic noise generated by the cylinder can be reduced by covering the surface of the cylinder with soft materials.The flow field results show that the soft materials prolong the wake of the cylinder and inhibit the vortex shedding at the rear edge of the cylinder.

关 键 词：钝体噪声 柔性材料 降噪 

分 类 号：V2[航空宇航科学技术]