噪声与振动控制2018，Vol.38Issue(1)：68-73,6.DOI:10.3969/j.issn.1006-1355.2018.01.013
共振式消声器气流再生噪声分析
Analysis of Flow Regeneration Noise of Resonant Mufflers
摘要
Abstract
The relationship between the flow regeneration noise(FRN)and the flow velocity as well as the temperature of resonant mufflers are studied. The models of the fluid field and acoustic field of a resonant muffler are established by means of LES-AA method.The test bench is built and the fluid and acoustic models are verified.On this basis,the FRN and turbulent kinetic energy(TKE)of the muffler are calculated.The computation results reveal that both FRN and TKE have very large values in structural mutation of the muffler and the nephogram distributions of the two parameters are in accordance each other. The FRN frequencies are mainly below 3 000 Hz. The sound pressure level increases with the increasing of inlet flow velocity and decreases with the increasing of the air flow temperature.But its spectral characteristic is less influenced by the flow velocity and temperature.The FRN characteristics of multi-field coupling can be used as a reference for the resonant mufflers design.关键词
声学/气流再生噪声/多场耦合/大涡模拟/消声器Key words
acoustics/flow regeneration noise/multi-field coupling/large eddy simulation/muffler分类
建筑与水利引用本文复制引用
朱福,郭辉,王岩松,魏民祥,吴江..共振式消声器气流再生噪声分析[J].噪声与振动控制,2018,38(1):68-73,6.基金项目
上海市自然科学基金资助项目(14ZR1418600) （14ZR1418600）
国家自然科学基金资助项目(51675324,51175320) （51675324,51175320）
上海市教委科研创新资助项目(13YZ110) （13YZ110）
