摘要
本文采用DES模型分析压气机叶栅内部流动及尾迹掺混,探讨了DES模型系数对数值模拟精度的影响。结果显示,模型系数取为0.65时,计算总压损失和实验相比偏小;模型系数取为0.065时,计算粘性太小,端壁出现提早分离,而当模型系数取为0.2时,得到了较好的模拟结果。
DES （Detached-Eddy Simulation） based on S-A model of RANS is performed to investigate the flow in a compressor cascade in the present study. The modeling coefficient CDES is set orderly to 0.065, 0.2 and 0.65. In the present MUSCL reconstructed Roe scheme, DES results with the modeling coefficient at 0.2 are perfect comparing to the experimental ones, total pressure loss results for modeling coefficient at 0.65 behave lower that the experimental ones, premature departure emerges in the modeling with its coefficient at 0.065. DES shows more consistent with experimental results than the SA results, instantaneous results with modeling coefficient at 0.2 are also presented.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第12期2007-2010,共4页
Journal of Engineering Thermophysics
基金
973项目(No.2007CB210105)
国家自然科学基金资助项目(No.50776051)
