管口声辐射特性在消声器出口端应用的研究  

Research on Acoustic Radiation Characteristics of Nozzles at Outlets of Mufflers

作　　者：黄加晟 赵晓丹[1] 孙黎明 王志鹏[2] HUANG Jiasheng;ZHAO Xiaodan;SUN Liming;WANG Zhipeng(School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu China;State Key Laboratory of Power System of Tractor,Luoyang Tractor Research Institute Co.Ltd.,Luoyang 471039,Henan China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]拖拉机动力系统国家重点实验室洛阳拖拉机研究所有限公司,河南洛阳471039

出　　处：《噪声与振动控制》2018年第3期177-180,共4页Noise and Vibration Control

基　　金：拖拉机动力系统国家重点实验室开放基金资助项目(SKT2016013);江苏省高校优势学科建设工程资助项目(PAPD)

摘　　要：声音通过管道传播到管口有一定的反射特性,研究这一特性将其应用于消声器出口端,提高消声器性能。计算出管口的声阻抗,作为出口边界条件代入Virtual.Lab Acoustics软件中计算消声器出口端的消声性能,使计算结果能反映出管口的声辐射特性。计算研究显示,在保持相同的流通面积下,消声器采用多出口管,管径缩小反射现象更剧烈,能够起到提高消声性能的作用,并开展了相应的试验研究,验证了这一结果。研究工作对消声器管口的设计有一定借鉴作用。Sound transmission through the pipe to the nozzle has a reflection behavior, which can be applied to the outlet to improve the sound elimination performance of the muffler. In this paper, the acoustic impedance at the orifice of the muffler is calculated and used as the boundary condition at the outlet to evaluate the sound elimination performance of the outlet by means of the Virtual. Lab Acoustics software. Result of calculation shows that for the same flow area, using more outlet pipes and smaller diameter of the pipes can aggravate the reflection effect and improve the performance of noise reduction of the muffler. A series of experiments is carried out to confirm the result. This research has a reference value for the design of muffler outlets.

关 键 词：声学 噪声控制 消声器 管口声辐射 声压反射 

分 类 号：TU112.597[建筑科学—建筑理论]