定常压力梯度边界层相干结构的直接数值模拟  

Direct Numerical Simulation of Coherent Structures in a Boundary Layer with Steady Pressure Gradients

作　　者：李兆瑞[1] 陆利蓬[2] 张强[1] 

机构地区：[1]北京航空航天大学动力系,北京100083 [2]中国科学院力学研究所非线性连续介质力学开放实验室

出　　处：《北京航空航天大学学报》2003年第4期321-326,共6页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目 ( 10 172 0 16);国家重点基础研究发展规划资助项目 ( 19990 2 2 3 0 5 )

摘　　要：根据流动稳定性理论 ,将不稳定波的一个周期作为相干结构的初值 ,采用直接数值模拟方法对有压力梯度湍流边界层中相干结构的演化进行了研究 ,得出其各种特性的变化与实验观测到的结果一致 .By using the method of direct numerical simulation(DNS), evolution of coherent structures in the wall region of a turbulent boundary layer with three different pressure gradients was studied. Initial values of the coherent structures in the wall region were obtained on the basis of the idea of resonant triad in the theory of hydrodynamic stability. It was found that the results of DNS match with those of the experiments very well in many aspects. The effects of pressure gradient on coherent structure were obtained by comparing the results of three different cases.

关 键 词：湍流边界层 压力梯度 数值模拟 波 

分 类 号：V231.21[航空宇航科学与技术—航空宇航推进理论与工程] O357.5[理学—流体力学]