摘要
如何选取恰当的入口条件,是进行湍流边界层直接数值模拟时必须考虑的一个问题.为此建议了一种方法,只需要有平板湍流边界层时间模式直接数值模拟(DNS)所得的一个瞬时的流场,而且其Mach数、Reynolds数及壁面温度条件无需和实际问题中的完全相同,就可导出超声速钝锥湍流边界层空间模式直接数值模拟所需的入口条件.通过3个典型算例,将结果与用其它方法所得结果相比,证实了该方法的可行性.
For the direct numerical simulation （DNS） of turbulent boundary layers, how to generate an appropriate inflow condition is a problem that needs to be considered. A method was proposed, by which the inflow condition for spatial-mode DNS of turbulent boundary layers on supersonic blunt cones with different Math number, Reynolds number and wall temperature conditions can be generated, based only on a given instant flow field obtained by a temporal-mode DNS of a turbulent boundary layer on a flat plate. The effectiveness of the proposed method is shown by three typical examples, through comparing its results with those obtained by other methods.
出处
《应用数学和力学》
CSCD
北大核心
2008年第8期893-904,共12页
Applied Mathematics and Mechanics
基金
国家自然科学重点基金资助项目(10632050)
国家自然科学基金重大研究计划项目(90716007)
全国博士学位论文作者专项基金资助项目(200328)
关键词
湍流边界层
直接数值模拟(DNS)
超声速
钝锥
入口条件
turbulent boundary layer
direct numerical simulation（DNS）
supersonic
blunt cone
inflow condition
