摘要
在管道运输的研究中,针对实时监控问题,目前管道泄漏噪声的获得主要是采用实验的方法,易受模型尺寸、测量精度等因素限制。以广义莱特希尔(L ighth ill)理论为基础,利用商业软件fluent对输流管道泄漏的流场进行数值仿真。据实际情况设置边界条件,分析了流速的变化。接着运用基于LES大涡仿真法和FW-H方程相匹配的技术,对管道泄漏噪声进行了CAA数值仿真,通过快速傅立叶变换对泄漏点处及测量点处的压力进行了频谱分析,对比了不同点声压的特点。通过仿真实验,结果表明,为噪声研究提供了参考,对实际的管道泄漏声场分析和监测有较大的参考价值。
At present,the pipe leak noise is mainly obtained by experiment,the way is restricted by the model size,measurement accuracy and other constraints,In this paper,based on generalized Lighthill theory,we simulate the flow field of the transmission pipe by commercial software fluent,set the boundary conditions according to the actual situation.Through large-eddy simulation and FFT of the leakage point pressure,sound pressure frequency spectrum is obtained.This work have some reference value for the analysis and monitoring of actual piprline leak sound field.
出处
《计算机仿真》
CSCD
北大核心
2010年第12期381-385,共5页
Computer Simulation
关键词
管道
泄漏
气动噪声
仿真
Pipe
Leakage
Aeroacoustics
Simulation
