XY-SAS模型对于分离流动的性能分析

高瑞泽; 徐晶磊; 赵 瑞; 阎 超

XY-SAS模型对于分离流动的性能分析

北京航空航天大学航空科学与工程学院, 北京 100191

基金项目: 国家重点基础研究发展计划资助项目 (2009CB724104)

详细信息

作者简介:
高瑞泽(1981-),男,山东淄博人,博士生,grz720000@vip.sina.com.

中图分类号: O 357.5
计量
- 文章访问数: 3299
- HTML全文浏览量: 269
- PDF下载量: 1440
- 被引次数: 0
出版历程
- 收稿日期: 2010-01-12
- 网络出版日期: 2010-04-30

Evaluation of XY-SAS model for separated flows

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: XY-SAS(Xu-Yan-Scale Adaptive Simulation)模型是一种新的基于平均涡量的一方程SAS类模型,不但解决了分离涡模拟DES(Detached Eddy Simulation)的雷诺平均N-S方程RANS(Reynolds Averaged Navier-Stokes)-大涡模拟LES(Large Eddy Simulation)交界面问题,而且计算量远小于早期SAS.通过对XY-SAS模型的机理分析,认为该模型克服了早期SAS模型预测的湍流能谱在高波数衰减不足的缺陷,并在分析的基础上对该模型进行了改进,取消了其限制器.选用平板边界层和方柱绕流作为算例,进一步研究了该模型对于稳态流动和大分离流动的性能,数值模拟结果同实验值符合良好,证明XY-SAS模型自身完备,是预测稳态流动和大尺度分离流动的有效方法,实现了涡粘性系数根据当地流动状态动态地自适应调整和光滑过渡.
- 大涡模拟 /
- 分离流 /
- 分离涡模拟 /
- SAS模型 /
- 限制器
Abstract: Xu-Yan-scale adaptive simulation (XY-SAS)is a new one-equation scale-adaptive simulation model proposed on the basis of average vorticity. It resolves the reynolds average navier-stokes(RANS)-large eddy simulation(LES) interface problem in detached eddy simulation (DES) with much smaller computation cost compared with pioneer SAS model. It was analyzed that XY-SAS model can provide proper damping of resolved turbulence at high wave number end of the spectrum compared with pioneer one. The limiter was removed based on mechanics analysis and this model was improved. Flat plate boundary layer and square cylinder were chosen as test cases for further evaluation of XY-SAS. The numerical results agree well with the experimental data, which proves that XY-SAS is an effective method for large scale separation flow and the model itself is complete. The model viscosity is determined adaptively according to the local flow behavior .A smooth transition is achieved from RANS to LES region.
- large eddy simulation /
- separation flow /
- detached eddy simulation (DES) /
- scale adaptive simulation (SAS) /
- limiter

HTML全文

参考文献(1)

[1] Speziale C，Computing nonequilibrium flows with timedependent RANS and VLES[C]//Proceedings of the 15th International Conference on Numerical Menthods in Fluid Dynamics.Monterey:SpringerVerlag, 1996:123-129 [2] Spalart P R，Jou W H，Strelets M，et al.Comments on the feasibility of LES for wings，and on a hybrid RANS/LES approach[C]// Liu C， Liu Z.1st AFOSR Int Conf on DNS/LES，in Advances in DNS/LES.Columbus:Greyden Press，1997:137 [3] Forsythe J R，Squires K D，Wurtzler K E，et al.Detachededdy simulation of fighter aircraft at high alpha [R].AIAA 20020591,2002 [4] 徐晶磊，阎超.一个一方程ScaleAdaptive Simulation 模型的构造[C]//第14届全国计算流体力学会议，贵州:[出版者不详]，2009：113-117 Xu Jinglei，Yan Chao，A oneequation scaleadaptive simulation model[C]//14th National Conference on CFD，Guizhou:[s.n.],2009:113-117(in Chinese) [5] Menter F R，Egorov Y，A scaleadaptive simulation model using twoequation models[R].AIAA 20051095,2005 [6] Gao Hui, Fu Dexun, Ma Yanwen, et al, Direct numerical simulation of supersonic turbulent boundary layer flow[J].Chinese Physics Letters,2005,22(7):1709-1712 [7] Lyn D A，Einav S，Rodi W，et al.A laserdoppler velocimetry study of ensembleaveraged characteristics of the turbulent near wake of a square cylinder[J].Journal of Fluid Mechanics,1995,304:285-319 [8] Grigoriadis D G E，Bartzis J G，Goulas A.LES of the flow past a rectangular cylinder using the immersed boundary concept[J].Int J Numer Meth Fluids,2003,41:615-632 [9] 谢志刚，许春晓，崔桂香，等.方柱绕流大涡模拟[J].计算物理，2007,24(2)：171-180 Xie Zhigang,Xu Chunxiao,Cui Guixiang,et al.Large eddy simulation of flows around a square cylinder[J].Chinese Journal of Computational Physics,2007,24(2):171-180 (in Chinese)

施引文献

资源附件(0)

访问统计