Study on influence of pipeline fluid flow on noise elimination performance of hydraulic muffler
Fluid noise radiates into the ocean through water pipelines,which seriously affects the concealment and safety of underwater vehicles.The installation of water pipeline mufflers is an important measure to reduce the radiation noise of water pipelines.In order to consider the effect of fluid flow on the performance of water pipe muffler,using the numerical calculation results of the internal flow field of the expansion muffler,mean flow average velocity theory was used to calculate the transmission loss of the muffler when considering the internal fluid flow,and to explore the influence of the velocity structure on the transmission loss of the muffler.The calculation results showed that,under the condition of low flow velocity,the flow velocity had little effect on the transmission loss of the muffler,but the fluid regeneration noise would cause a low value of the transmission loss of the muffler at a specific frequency,and the muffler structure needed to be improved.The calculation showed that the low value of muffler under specific frequency could be effectively improved by modifying the structural parameters of the muffler and the structure of series resonant chamber muffler.This paper can provide theoretical reference for noise reduction calculation methods.
NETL
NSTL
万方数据
维普
