摘要
脱体涡模拟方法(DES,Detached Eddy Simulation)由于结合了湍流模型(RNAS,Reynolds Averaged Navier-stokes)和大涡模拟(LES,Large Eddy Simulation)两者各自优势,是模拟非定常大分离流动的有效方法.采用基于SA(Spalart-Allmaras)湍流模型的DES方法,对高超声速返回舱外形进行数值模拟,计算所得的返回舱表面压力及热流分布与实验结果吻合,证实了DES方法的优越性.最后,在DES方法中加入可压缩修正,结果证实在高超声速流动中,可压缩修正方法在一定程度上能够提高原始模型的预测性能.
Detached eddy simulation （DES） is an effective numerical simulation method for unsteady separated flow since it combines the advantages of both Reynolds averaged Navier-Stokes （RANS） and large eddy simulation （LES） methods. Spalart-Allmaras（SA） based DES method is used for the re-entry case under hypersonic condition. Comparison of the pressure and heat flux distributions shows that the numerical results a- gree well with the experiment data and thus validate the advantages of the DES method. Compressibility cor- rections were added in the original SA turbulent model. In the hypersonic flow characterization, the introduc- tion of compressibility corrections can better the original turbulent method＇ s simulation capability.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2013年第5期590-594,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家973计划资助项目(2009CB724104)
关键词
脱体涡模拟方法
可压缩修正
湍流模型
气动热
返回舱
detached eddy simulation（DES）
compressibility correction
turbulent model
heat flux
re-entry
