THE VELOCITY AND VORTICITY VECTOR-FIELDS OF A TURBULENT BOUNDARY-LAYER .1. SIMULTANEOUS MEASUREMENT BY HOT-WIRE ANEMOMETRY

被引:80
作者
VUKOSLAVCEVIC, P
WALLACE, JM
BALINT, JL
机构
[1] Vlahović University
[2] Department of Mechanical Engineering, University of Maryland, College Park
关键词
D O I
10.1017/S0022112091002628
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
A nine-sensor hot-wire probe is described which is capable of simultaneously measuring the velocity and vorticity vectors with a spatial resolution of about six Kolmogorov microscales just above the viscous sublayer in a thick turbulent boundary layer at a Reynolds number of R-theta = 2685. Results from tests of the probe performance are presented to show that the three velocity components at each of its three arrays are measured with sufficient accuracy to allow determination of velocity gradients and from them the vorticity vector. Measurements with this probe of statistical properties of the velocity and vorticity fields of the turbulent boundary layer are given in Part 2 of this paper. When compared to the results of others, they further demonstrate the capability of this probe to measure simultaneously the velocity and vorticity vectors in turbulent flows of low to moderate Reynolds numbers.
引用
收藏
页码:25 / 51
页数:27
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