ORGANIZATION IN A TURBULENT NEAR-WAKE

被引：16

作者：

ANTONIA, RA

机构：

[1] Department of Mechanical Engineering, University of Newcastle, Newcastle

来源：

FLUID DYNAMICS RESEARCH | 1991年 / 7卷 / 3-4期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1016/0169-5983(91)90054-M

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The streamwise evolution of the turbulence structure in the near-wake of a cylinder has been quantified using data from an array of eight X-probes in the plane of mean shear. The relative probability of detections of large scale vortical structures on opposite sides of the centreline indicates that the spatial arrangement of these structures can vary in a continuous manner between a dominant alternating (antisymmetric) mode and an opposing (symmetric) code. At a distance of ten diameters from the cylinder, the contributions from the alternating mode to the lateral turbulence intensity v2BAR and Reynolds shear stress uvBAR are appreciable. These contributions are discussed in the context of the main topological features of this mode. Contributions to v2BAR and uvBAR from the opposing mode increase with distance from the cylinder. The opposing mode makes a significant contribution to the longitudinal turbulence intensity, especially near the centreline.

引用

页码：139 / 149

页数：11

共 18 条

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