TNT k-omega湍流模型的隐式解法及其在超声速流动模拟中的应用  

APPLICATION OF IMPLICIT TNT TURBULENCE MODEL FOR SUPERSONIC FLOW SIMULATION

作　　者：赵慧勇[1,2] 雷波[1] 黄为民[2] 乐嘉陵[2] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《数值计算与计算机应用》2010年第2期108-115,共8页Journal on Numerical Methods and Computer Applications

基　　金：国家863高技术研究发展计划(2006AA1149)资助

摘　　要：为了提高超声速流动模拟的稳定性和计算效率,TNT湍流模型的时间推进方法从原来的显式Runge-Kutta方法推广到隐式LU-SGS方法.采用隐式TNT湍流模型对四个超声速流动算例进行了计算,并与SST模型进行了比较.计算结果表明TNT模型适应范围较广,计算精度与SST模型基本相当,其中在超声速压缩拐角的算例中优于SST模型,而且计算定常解的计算效率优于SST模型,值得进一步推广应用.In order to improve the stability and efficiency for numerical simulation of supersonic flow, the time-stepping method of TNT turbulence model is generalized from explicit Runge- Kutta method to implicit LU-SGS method. Four supersonic flow cases are computed by implicit TNT model and the results are compared with those of SST model. The results have shown that the TNT model has broad scope of application and comparable computa- tional resolution with SST turbulence model. In particular, TNT model is superior to SST model for supersonic compressing corner. Moreover, TNT model has better computational efficiency than SST model for steady solutions. As a result, TNT model is worth for further generalization.

关 键 词：计算流体力学 湍流模型 时间推进方法 隐式方法 

分 类 号：O357.5[理学—流体力学]