求解脉动速度关联函数的新方法及其在平面湍尾流中的应用  

THE NEW METHOD OF SOLVING VELOCITY CORRELATION FUNCTIONS AND ITS APPLICATION TO-THE PLANE TURBULENT WAKE

作　　者：林建忠[1] 黄永念[2] 周培源[2] 

机构地区：[1]浙江大学力学系,杭州310072 [2]北京大学力学系湍流国家重点实验室,北京100871

出　　处：《力学学报》1993年第6期643-650,共8页Chinese Journal of Theoretical and Applied Mechanics

基　　金：浙江省自然科学基金

摘　　要：将周培源给出的平面湍尾流的一级近似解作为已知量,代入湍流脉动速度方程中,在微尺度范围内,采用谱方法对该方程进行数值求解,得到了和实验结果符合的二阶、三阶、四阶脉动速度关联函数的计算结果。In this paper, the results of plane turbulent wake given by Zhou Peiyuan are considered as the first order approximation and put, into the equations of turbulent fluctuation. The equations are solved numerically within the range of micro-scale by means of spectrum method. The double, triple and quadruple fluctuating velocity correlations are obtobred by computation. They are in a good agreement with experimental results.

关 键 词：脉动速度 关联函数 湍流尾流 

分 类 号：O357.52[理学—流体力学]