分流气体对冲消声器内流场及再生噪声分析  

Analysis of Internal Flow Field and Regeneration Noise in the Split-stream-rushing Muffler

作　　者：霍黎明 武佩[1] 苏赫[1] 范秀琴 张永安[1] 马彦华[1] HUO Liming;WU Pei;SU He;FAN Xiuqin;ZHANG Yongan;MA Yanhua(College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Innner Mongolia Engineering Research Center for Intelligent Facilities in Grass and Livestock Breeding, Hohhot 010018, China;Archives of Inner Mongolia Agricultural University, Hohhot 010018, China)

机构地区：[1]内蒙古农业大学机电工程学院内蒙古自治区草业与养殖业智能装备工程技术研究中心,呼和浩特010018 [2]内蒙古农业大学档案馆,呼和浩特010018

出　　处：《噪声与振动控制》2019年第2期215-221,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(11464036);"双一流"学科创新团队建设人材培育资助项目(NDSC2018-07)

摘　　要：对新型分流气体对冲排气消声器进行内流场分析,发现隔板以及弯头部件区域存在压力损失较大的问题,通过增加导流环、加大弯头半径等方法,减小消声器的排气压力损失,并利用FW-H声学比拟法对改进前后的消声器进行再生噪声分析。结果表明,通过对消声器内部结构的合理改进,在入口流速为40 m/s时,改进后的消声器压力损失降低35%,出口噪声降低1.5 dB左右。通过试验验证了数值计算的正确性,研究结果对新型消声器的设计具有一定的指导意义。Through analyzing the inner flow field of a new type split-stream-rushing muffler, the problem of greater pressure loss in diaphragm and elbow areas is found. By adding a guide ring and enlarging the bend radius, the exhaust pressure loss of the muffler is reduced. The FW-H acoustic analogy method is used to study the regeneration noise of the mufflers before and after the structural modification. The results show that the pressure loss is reduced by 35 % for the internal structure improved muffler when the inlet velocity is 40 m / s, and the exit noise is decreased by 1.5 dB. The correctness of numerical simulation is verified by tests, and the results of the study have provided the guidance for developing the new mufflers.

关 键 词：声学 分流气体对冲 消声器 结构优化 再生噪声 

分 类 号：TK411.6[动力工程及工程热物理—动力机械及工程]