壁紊流的紊流结构及其缩尺效应

Structure and scale effect of wall turbulent flow

本文研究了边壁紊流的壁区紊流结构及其缩尺效应。文中包括:(1)研究了壁区的紊流结构特征;(2)论证了壁区的紊流结构对整个紊流场的支配作用;(3)探讨了壁区紊流结构的缩尺影响及其控制,重点讨论了条带结构、涡旋结构和猝发过程的缩尺效应。

In this paper, the wall turbulent structure and its scale effect are investigated, the investigation consists of three parts: (1) The characteristics of the turbulent structure for the wall region are described; (2) Whole flow fields controlled mainly by the turbulent structure of wall region is demonstrated; (3) The scale effect of the turbulent structure in the wall region and its control are discussed, and the discussion deals mainly with the scale effects of the streak structure, the vortex structure and the bursting frequency.