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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 >Experimental study of convective exchange in a low aspect ratio perforation: Application to cooling of multiperforated wall
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Experimental study of convective exchange in a low aspect ratio perforation: Application to cooling of multiperforated wall

机译：低纵横比射孔对流交换的实验研究：在多孔壁冷却中的应用

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摘要

This work presents an experimental study pertaining to convective transfer in pipes with a square-edged inlet simulating the perforation of a multiperforated wall. The experiments were performed for a range of Reynolds numbers from 3000 to 35,000 and an aspect ratio from 2 to 8. The results achieved have allowed us to characterize the different flow areas within the pipe: takeoff, landing, and developed; they have also enabled us to highlight the influence of aerothermic (Re) and geometric(l/d, type of inlet and number of perforations) parameters. We are likewise proposing correlations allowing for determination of the convective exchange coefficient from preliminarily underscored characteristic points (maximum, minimum and established) in the perforation. (C) 2008 Elsevier Inc. All rights reserved.
机译：这项工作提出了一项与管道对流传输有关的实验研究，该管道具有一个正方形边缘的进气口，可模拟多孔壁的穿孔。实验的雷诺数范围为3000至35,000，长宽比为2至8。获得的结果使我们能够表征管道内的不同流动区域：起飞，着陆和展开;它们还使我们能够重点介绍放热（Re）和几何参数（l / d，入口类型和穿孔数量）的影响。我们同样提出了相关性，以允许从穿孔中预先强调的特征点（最大，最小和确定的）确定对流交换系数。 （C）2008 Elsevier Inc.保留所有权利。

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