摘要
本文采用基于SA模型和SST模型的两种延迟脱体涡模拟方法(DDES)对压气机高负荷PVD叶栅进行数值模拟。评估了这两种方法对叶栅内三维角区分离流动现象的预测准确性。通过对比发现DDES-SA方法过大地预测了压气机叶栅内的三维角区分离流动现象,而DDES-SST方法与实验结果符合的较好。基于这两种方法建立的湍流场数据库,本文还分析了角区分离区内湍流能谱密度和各向异性,结果表明,DDES-SST方法的计算结果更符合真实流场。
Three-dimensional(3 D) corner separation region in a highly loaded compressor cascade has been investigated by delayed detached eddy simulation(DDES) method based on SA and SST model respectively. Predictive capabilities of DDES-SA and DDES-SST method on 3 D corner separation has been assessed in detail. It is found the results from DDES-SA method overestimate the3 D corner separation in the cascade and the results from DDES-SST method agree to the measurement better. Turbulence power spectra density(PSD) and turbulence anisotropy in the 3 D corner separation have been studied and it is proved the results from DDES-SST method are more reasonable.
作者
闫昊
柳阳威
陆利蓬
YAN Hao;LIU Yang-Wei;LU Li-Peng(Nation Key Laboratory of Science and Technology on Aero-Engine Aero- Thermodynamics, School of Energy and Power Engineering, Beihang University, Beijing 100191, China;Collaborative Innovation Center of Advanced Aero-Engine, Beihang University, Beijing 100191, China;Science and Technology on Space Physics Laboratory, China Academy of Launch Vehicle Technology, Beijing 10076, China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第6期1240-1249,共10页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51676007,No.51420105008,No.51790513)
博士后基金(No.2018M631308)
