边壁剪切流若干特性研究  

Some Properties of Turbulent Shear Flow

作　　者：刘兆存[1] 范玮佳[2] 

机构地区：[1]重庆交通大学西南水运工程科学研究所,重庆400016 [2]重庆交通大学河海学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2009年第6期1083-1087,1111,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国际科技支撑计划专题资助项目(2006BAB05B02);重庆交通大学青年科技基金(XN(2009)04)

摘　　要：分析了壁面剪切流的流动特性及计算内部能量间的分配关系,研究了层流、湍流的流动特性和层流到湍流转捩的特点,讨论了剪切流的一般机理。指出能量传递和不同阶段的不同结构有关,能量耗散和扩散与共振和锁频密切相联系。研究表明,湍流从本质上看是一种局部现象并且具有对称破缺的特性。The flowing properties of wall shear flow are analyzed and the distribution relationship of internal energy is calculated. Furthermore, the dynamic characteristics of laminar and turbulent flow as well as the transition from the laminar flow to turbulent flow are studied. On the basis of reviewing and commenting the related literature review, the general mechanism of turbulent shear flow is probed. The result shows that the energy transfer has relations with different structures at different flowing stages, and the dissipation and diffusion of energy relate closely with the resonance and frequency-locking;the turbu- lence is a partial phenomenon and has symmetric breaking＇s character in essence.

关 键 词：剪切湍流 能量分配 拟序结构 湍流封闭性 

分 类 号：O357.5[理学—流体力学] TV131.21[理学—力学]