水管路消声器声学性能的时域计算及分析  

Time-domain computation and analysis of acoustic attenuation performance of water-filled silencers with mean flow

作　　者：苏胜利[1] 王强勇[1] 

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430064

出　　处：《舰船科学技术》2016年第2期65-68,共4页Ship Science and Technology

摘　　要：将三维时域CFD方法应用于计算和分析水管路消声器的声学性能。对于直通穿孔管消声器与横流穿孔管消声器,在不考虑水的流动时,传递损失的时域CFD方法计算结果与频域有限元法计算结果吻合很好。时域CFD方法进而被用于研究流速对穿孔管消声器消声特性的影响。计算结果表明,介质流动增大了消声器的传递损失,特别是在高频区域;消声器的传递损失随流速的增加而增大。The three-dimensional time-domain computational fluid dynamics（ CFD） approach is applied to calculate and analyze 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 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 with different rate of flow. The numerical predictions demonstrated that the mean flow increases the transmission loss,especially at higher frequencies. And in the range of calculated mean flow velocity,transmission loss increases with the increasing of flow velocity.

关 键 词：水消声器 消声性能 时域CFD方法 流动效应 穿孔管 

分 类 号：TB535[理学—物理]