A hot-wire probe configuration and data reduction method to minimize velocity gradient errors for simultaneous measurement of three velocity components in turbulent flows

被引：0
作者：
P. V. Vukoslavčević
机构：
[1] University of Montenegro,Department of Mechanical Engineering
来源：
Experiments in Fluids | 2012年 / 53卷
关键词：
Velocity Component; Velocity Gradient; Direct Numerical Simulation; Reynolds Shear Stress; Sensor Arrangement;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A highly resolved turbulent channel flow direct numerical simulation (DNS) with Reτ = 200 has been used to investigate the influence of the velocity gradients on the measurement accuracy of a hot-wire probe capable of measuring all three velocity components simultaneously. A new proposed sensor arrangement has been tested. First, the effective cooling velocity was determined for each sensor of the idealized probe, where the influence of the velocity component tangential to the sensors and flow blockage by the presence of the probe are neglected. Then, velocity component statistics were calculated, neglecting the velocity gradients over the probe sensing area, and they were compared to the DNS database values. It has been shown that the influence of the velocity gradients on the new proposed arrangement is minimized. Its accuracy was compared to existing three- and four-sensor configurations as well as to two-sensor X- and V-array probes.
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页码：481 / 488
页数：7
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