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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Developing heat transfer and pressure loss in an air passage with multi discrete V-blockages
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Developing heat transfer and pressure loss in an air passage with multi discrete V-blockages

机译：具有多离散V-封闭的空气通道中的传热和压力损失

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摘要

The multi V blockage shapes in discrete type have been evaluated for augmentation in heat transfer and pressure loss in an air flow passage. The data points obtained during experimentation are correlated among different geometrical variations specified as: distance of blockage, width of the blockage, height of the blockage, pitch between the consecutive blockages, width of the discrete region of the blockage, and attack angle of the flow. These variations in the configuration of the multi discrete V-blockage has significant effect on heat transfer and pressure loss in an air flow passage. The aspect ratio of the air flow passage is 10. The flow Reynolds number is varied within the range: 3000-8000. The relative blockage height varied in the range: 0.25-1.0, relative blockage pitch in the range: 8.0-12, relative blockage distance in the range: 0.27-0.77, relative discrete width in the range: 0.50-1.5, flow attack angle in the range: 30-70 degrees and relative blockage width in the range: 1.0-6.0. The investigation affirms the achievement of high thermohydraulic performance, the best achieved at relative blockage height of 0.5, relative blockage pitch of 10, discrete blockage distance of 0.67, relative discrete width of 1.0, flow attack angle of 60 degrees and relative blockage width of 5.0 compared to an air passage without blockages. The investigation has been further carried out to develop Nusselt number and friction factor correlations in terms of flow and geometrical parameters. Further, the performance of different blockage shapes with that of present study has been carried out in terms of thermohydraulic performance parameter. (C) 2017 Published by Elsevier Inc.
机译：已经评估了在空气流动通道中的传热和压力损失中增加了离散类型的多V堵塞形状。在实验期间获得的数据点在指定为：堵塞距离，堵塞距离，堵塞宽度的距离，连续堵塞之间的间距，堵塞的离散区域的宽度以及流动的宽度之间的距离，以及流动的宽度之间的距离和流动的宽度之间的间距。 。这些多离散V阻断的配置的这些变化对空气流动通道的热传递和压力损失具有显着影响。空气流动通道的纵横比为10.流量雷诺数在范围内变化：3000-8000。相对堵塞高度在范围内变化：0.25-1.0，相对堵塞间距在范围内：8.0-12，相对堵塞距离范围：0.27-0.77，相对离散宽度范围：0.50-1.5，流动攻击角范围：30-70度，相对堵塞范围范围：1.0-6.0。调查肯定了高温性能的实现，最佳堵塞高度0.5，相对堵塞间距10，离散堵塞距离为0.67，相对离散的宽度为1.0，流动攻击角60度，相对堵塞宽度为5.0与空气通道相比没有堵塞。在流动和几何参数方面，还进一步开展了调查，以发展营养数和摩擦因子相关性。此外，在热液化性能参数方面已经进行了具有本研究的不同块形状的性能。 （c）2017年由elsevier公司发布

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