首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer in turbulent separated flow behind a rib on the surface of square channel at different orientation angles relative to flow direction
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Heat transfer in turbulent separated flow behind a rib on the surface of square channel at different orientation angles relative to flow direction

机译:在湍流分离流中,相对于流向的不同定向角下,方形通道表面上的肋后面的传热

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摘要

Experimental results on turbulent streamlining of a flat rib on a flat surface at a change in the rib orientation angle relative to the flow are presented in this paper. Experiments were carried out for angles φ varying from 50° to 90° and three values of rib height. Data on visualization were used for determination of the pattern of vortex formation and coordinates of reattachment line. Deformation of the recirculation region and obvious 3D character of the flow behind the rib with a decrease in angle φ considered. The pressure coefficients were measured in different longitudinal cross-sections of the channel behind the rib with varying orientation angle φ. The temperature fields on the surface behind the rib were determined by means of the thermography method and with the help of thermocouples. The effect of the angle of flow angularity and rib height on dynamic and thermal characteristics of the separated flow was analyzed.
机译:本文给出了在相对于流动的肋取向角变化的情况下,在平坦表面上对扁平肋进行湍流流线化的实验结果。针对从50°到90°的角度φ和肋高的三个值进行了实验。可视化数据用于确定涡旋形成的模式和重新附着线的坐标。再循环区域的变形和肋后方流动的明显3D特性(考虑了角度φ的减小)。在肋后面的通道的不同纵向横截面中以不同的定向角φ测量压力系数。肋骨后表面的温度场是通过热成像方法并借助热电偶确定的。分析了流动角度和肋高对分离流动的动力学和热学特性的影响。

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