摘要
利用大涡模拟(LES)对喷管超音速高温射流流场进行了三维非稳态数值模拟,根据流场的湍流特性确定声源,选取积分面,利用FW-H方程计算远场观测点的声强,最后与相关文献中的试验结果进行对比。结果表明,该方法得到的计算结果与试验结果较吻合,但由于网格限制,远场的高频声谱存在一定的误差。
This study is focused on using Large Eddy Simulation(LES) to simulate the 3-D unsteady supersonic hot jet flows.Base on turbulence characteristics,noise sources and integral surfaces are selected.The near field data are collected from the LES and then the far field noise is computed by the Ffowcs Williams-Hawkings(FW-H) surface integral method.The results show a good agreement with experimental data.But there are some deviations in the high frequency spectra due to the mesh quality.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2011年第4期436-439,共4页
Journal of Solid Rocket Technology
关键词
喷射
气动噪音
数值模拟
大涡模拟
jet
aerodynamic noise
numerical simulation
large eddy simulation(LES)