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首页> 外文期刊>Journal of Heat Transfer >Thermal Performance of a Corrugated Wall With Artificial Roughness
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Thermal Performance of a Corrugated Wall With Artificial Roughness

机译：具有人工粗糙度的波纹壁的热性能

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摘要

This paper aims to determine the flow characteristics and thermal performance of plate heat exchangers. The study is divided into two parts. In the first part, four different shapes of corrugated boundaries have been recommended, rectangular, trapezoidal, triangular, and sinusoidal shapes. In addition, an artificial roughness has been introduced to improve heat transfer within corrugated channel. In the second part, a corrugated wall was used at the inlet channel. Numerical results are presented as Nusselt number (Nu) and friction factor (C-f) using the commercial software ANSYS-FLUENT where the Reynolds number is ranged between 3000 and 12,000. The results of this investigation reveal that the overall thermal performance improves greatly by 50% due to the use of the sinusoidal artificial roughness and added undulations in the inlet channel. It is also observed that the latter case with the ratio A"/lambda" = 0.05 is the optimal design for the plate heat exchanger.
机译：本文旨在确定板式热交换器的流动特性和热性能。该研究分为两部分。在第一部分中，已经推荐了四种不同形状的波纹边界，矩形，梯形，三角形和正弦形状。另外，已经引入了人造粗糙度以改善波纹通道内的热传递。在第二部分中，在入口通道使用波纹壁。使用商业软件Ansys流畅的商业软件ANSYS-FLUENT呈现数值结果作为篮板数（NU）和摩擦因子（C-F），其中雷诺数范围在3000到12,000之间。本研究结果表明，由于使用正弦人工粗糙度并在入口通道中增加的波动，整体热性能可能提高了50％。还观察到，与“/λ”= 0.05比值的后一种情况是板式热交换器的最佳设计。

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