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首页> 外文期刊>Thermal engineering >Studying the Structure of a Zone in Which the Single-Phase Flow Moving in an Annular Channel with Partially Blocked Cross Section Becomes Spatially Disturbed
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Studying the Structure of a Zone in Which the Single-Phase Flow Moving in an Annular Channel with Partially Blocked Cross Section Becomes Spatially Disturbed

机译:研究单相流在环形通道中具有部分阻塞的横截面的空间扰动区域的结构

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The flow of liquid in an annular channel with a partially shaded flow section is experimentally studied using the electrodiffusion method. The effect on the flow structure produced by a shutter closing one-quarter of the channel cross section is shown. An obstacle installed in the channel causes the flow to attain a 3D structure. The flow pattern in such channel differs significantly from that observed in undisturbed flow moving in an annular channel. It is revealed that the friction stress values measured on the channel's inner wall depend essentially on the azimuth angle over the channel height. With distance away from the obstacle, the influence it has on the hydrodynamic flow structure tends to decrease, but the disturbance produced by it does not die out completely even at a distance of more than 600 mm from the obstacle. Data quantitatively characterizing the disturbance of flow structure in the studied channel are presented.
机译:使用电扩散方法,对带有部分阴影流动截面的环形通道中的液体流动进行了实验研究。显示了通过关闭通道横截面四分之一的百叶窗对流动结构的影响。安装在通道中的障碍物使流达到3D结构。在这种通道中的流动模式与在环形通道中未受扰动的流动中观察到的明显不同。结果表明,在通道内壁上测得的摩擦应力值基本上取决于通道高度上的方位角。随着距障碍物距离的增加,它对流体动力流结构的影响趋于减小,但是即使距障碍物的距离超过600 mm,由其产生的干扰也不会完全消失。提出了定量表征研究通道内流动结构扰动的数据。

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