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首页> 外文期刊>International Journal of Transport Phenomena >Measurements of Turbulent Flow in Transverse- or Angled-Rib-Roughened Stationary Channel by Using Two-Dimensional Particle Image Velocimetry
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Measurements of Turbulent Flow in Transverse- or Angled-Rib-Roughened Stationary Channel by Using Two-Dimensional Particle Image Velocimetry

机译：二维粒子图像测速仪测量横肋或斜肋粗化固定通道中的湍流

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摘要

This study experimentally deals with turbulent flow inside a straight rib-roughened duct in stationary condition. Details of the two-dimensional flow fields around transverse or angled ribs were quantitatively measured using particle image velocimetry (2D-PIV) with high spatial- and time-resolution. Flow separation, reattachment and recirculation behind the rib, small separation bubble in front of the rib, and secondary flow in the perpendicular cross section were observed. High turbulence intensity in the reattachment area and in front of the ribs, resulting from the highly fluctuating unsteady velocity vectors, was clearly captured. The results are relevant to internal forced convection cooling inside turbine blades.
机译：这项研究实验性地处理了在固定条件下直肋加粗管内的湍流。使用具有高空间和时间分辨率的粒子图像测速仪（2D-PIV）定量测量了围绕横向或成角度的肋骨的二维流场的细节。观察到肋骨后面的流动分离，重新附着和再循环，肋骨前面的小分离气泡以及垂直截面中的二次流动。在重新连接区域和肋骨前面的湍流强度很高，这是由于不稳定的速度矢量波动很大而引起的。结果与涡轮叶片内部的内部强制对流冷却有关。

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