Time-domain CFD computation and analysis of acoustic attenuation performance of water-filled silencers  

作　　者：LIU Chen JI Zhen-lin CHENG Yin-zhong LIUSheng-lan 刘晨;季振林;程垠钟;刘胜兰(Department of Power Engineering, China Ship Research and Development Academy;School of Power and Energy Engineering, Harbin Engineering University)

机构地区：[1]Department of Power Engineering, China Ship Research and Development Academy, Beijing 100192, China [2]School of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China

出　　处：《Journal of Central South University》2016年第9期2397-2401,共5页中南大学学报（英文版）

基　　金：Project(11174065)supported by the National Natural Science Foundation of China

摘　　要：The multi-dimensional time-domain computational fluid dynamics(CFD) approach is extended to calculate the acoustic attenuation performance of water-filled piping silencers. Transmission loss predictions from the time-domain CFD approach and the frequency-domain finite element method(FEM) agree well with each other for the dual expansion chamber silencer, straight-through and cross-flow perforated tube silencers without flow. Then, the time-domain CFD approach is used to investigate the effect of flow on the acoustic attenuation characteristics of perforated tube silencers. The numerical predictions demonstrate that the mean flow increases the transmission loss, especially at higher frequencies, and shifts the transmission loss curve to lower frequencies.The multi-dimensional time-domain computational fluid dynamics （CFD） approach is extended to calculate the acoustic attenuation performance of water-filled piping silencers. Transmission loss predictions from the time-domain CFD approach and the frequency-domain finite element method （FEM） agree well with each other for the dual expansion chamber silencer, straight-through and cross-flow perforated tube silencers without flow. Then, the time-domain CFD approach is used to investigate the effect of flow on the acoustic attenuation characteristics of perforated tube silencers. The numerical predictions demonstrate that the mean flow increases the transmission loss, especially at higher frequencies, and shifts the transmission loss curve to lower frequencies.

关 键 词：water-filled silencer acoustic attenuation performance time-domain CFD approach flow effect perforated tube 

分 类 号：TB535.2[理学—物理] TV672.3[理学—声学]