摘要
降低流动管道噪声在工程上是非常有用的。本文应用线性声学理论将无流动时旁通管道反声降噪方法推广到具有流动的情况，进行了数值计算和实验研究。数值工作包括建立相应的声学关系和管道分叉点连接条件；计算了多种噪声源传声损失频率特性，并讨论了主要参数对反声的影响。实验研究是对单段旁通管道有吸声尖劈的情况下进行的，实验时采用不同的噪声源和不同的流速，测量结果与理论计算符合良好。PACS数43．
Abstract :The noise reduction in ducts with flow is a very useful engineering problem. In this paper the method of noise reduction in ducts without flow using bypass is extended to the ducts with flow by the linear acoustic theory. The numerical calculation and experimental research were completed by the author. The numerical work includes formulating acoustic relations and joint conditions in the joint points of the duct and calculating spectrums of trasmission loss, i.e. TL, for various noise sources. Then the influences of main parameters on anti-sound are discussed. The experimental research was carried out for different noise sources and different flow velocities in the duct with single bypass and outlet absorbing wedge. The results of measurement are in good agreement with numerical calculation.
出处
《声学学报》
EI
CSCD
北大核心
1997年第1期1-10,共10页
Acta Acustica
基金
国家自然科学基金
内蒙古教育厅基金
