摘要
在工程应用当中旁通管对流动管道的降噪是非常有效的,在实际的工程应用中,从有源降噪的角度出发.通过理论推导,设计出不同降噪频段、不同类型的旁通管,并主要针对人耳所能听到的全频段噪声中所占权重最大的3 000~5 000 Hz频段降噪.通过试验可以发现,主管与旁通管截面积比不同时,降噪效果最优样品为主管与旁通管截面积比为1的旁通管,噪声降低3.9 d B;对于不同长度差的样品来说,当ΔL=56.7时旁通管的降噪效果最佳,噪声降低3.9d B.结果证明,旁通管在特定频段降噪效果是明显的,在设计中不同截面积比及长度差的旁通管降噪效果各有不同,只有合理的设计与搭配才能使整体达到最优降噪效果.
In engineering application the use of bypass pipe to eliminate noise is very useful. This article depends on practical engineering application. From the active noise reduction perspective using the linearacoustic theory, design of different types of bypass and mainly aimed at eliminate audible noise between 3 000-5 000 Hz.Through the experiment can find the best area ratio is 1 in the different area ratios,the noise reduced by 3.9 dB.The best length ratio is ΔL = 56.7 in the different length ratios, the noise reduced by 3.9 dB.The results showed that a single bypass pipe works well at a specific frequency band noise,and bypass pipe works differently to the noise in different area ratios and length ratios.With the right design,the bypass pipe does well in eliminating noise.
出处
《吉林化工学院学报》
CAS
2017年第5期81-84,共4页
Journal of Jilin Institute of Chemical Technology
关键词
耦合降噪
实验法
旁通管
线性声学
eliminate noise
experiments
bypass pipe
linear acoustic
