摘要
本文数值研究了声激波产生的条件及其降噪效果,详细讨论了声源强度,频率,管道形状,喉部流动马赫数及多频声源对声激波降噪效果的影响。由于声激波降噪需要附加一段具有高速流动的缩放管道,它会附加流动噪声和压力损失,本文提供了这方面的一组实验数据,以说明应用声激波消声器的现实可能性。
Conditions of generation of acoustic shock waves (ASW) and effects of ASW on noise reduction are numerically studied in this paper. Effects of intensity and frequency of noise sources, duct configuration, throat flow Mach number and mixed noise sources on noise reduction by ASW are discussed in detail. Meanwhile, a group of experimental data of additional noise pressure level and fluid pressure loss generated by flow in a duct is presented to explain the readability of using ASW silencers, because an additional Laval nozzle with high speed flow in it is necessary to reduce noise by ASW, which results in generation of the additional flow noise and pressure loss.
出处
《声学学报》
EI
CSCD
北大核心
1993年第4期272-279,共8页
Acta Acustica
基金
国家自然科学基金
