强化分析多射流撞击的流动特性和热性能：不同射流高度和间距的影响

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-04-15 DOI:10.1016/j.jtice.2025.106132

Jin Zhang , Yong Li , Jun Xia , Yingchun Zhang , Jiajie Zhang , Bengt Sunden , Gongnan Xie

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引用次数: 0

摘要

射流阵列被广泛认为是一种高效的冷却技术。目前研究的重点是如何在有限空间内最大限度地提高它们的传热效率。方法采用实验研究和数值模拟的方法，对冷却通道内圆形射流在不同高度（Hc）和孔距（dj）下的射流冲击进行了研究。分别使用单个、两个和三个射流，并且射流孔的直径(d)为2mm。雷诺数Re在72,673 ~ 145,346之间，射流间距dj/d和射流高度Hc/d的无因次距离在3 ~ 5之间。多个射流产生显著的湍流和混合流型，其换热性能受到Hc、dj、Re和射流相互作用等多种因素的影响。两种射流的换热性能优于三种射流，在Re =145,364、dj/d = 3、Hc/d = 5时，努塞尔数（Nu）达到峰值。对无量纲参数Hc/dj进行了深入的讨论。通过在合适的范围内适当调整Hc/dj，可以实现更有利的流动动力学，从而提高射流系统的冷却性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced analysis of flow characteristics and thermal performance in multiple jet impingements: Effects of varying jet heights and spacings

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Enhanced analysis of flow characteristics and thermal performance in multiple jet impingements: Effects of varying jet heights and spacings

Background

Jet arrays are widely recognized as highly efficient cooling techniques. The focus of ongoing research has been on maximizing their heat transfer efficiency within confined spaces.

Methods

Experimental studies and numerical simulations have been conducted to investigate the jet impingements at varying heights (H_c) and hole spacing (d_j) on circular jets within cooling channels. Single, two, and three jets are utilized, respectively, and jet holes possess a diameter (d) of 2 mm. The Reynolds number (Re) ranges from 72,673 to 145,346, and the dimensionless distance of the jet spacing (d_j/d) and the height to the target (H_c/d) varies between 3 and 5.

Significant finding

Multiple jets generate significant turbulent and mixed flow patterns, with their heat transfer performance being influenced by various factors such as H_c, d_j, Re, and jet interactions. The heat transfer performance of two jets outperforms that of three jets, achieving its peak Nusselt number (Nu) value at Re =145,364, d_j/d = 3, and H_c/d = 5. A thorough discussion is conducted on the dimensionless parameter H_c/d_j. By appropriately adjusting H_c/d_j within a suitable range, it is possible to achieve more favorable flow dynamics, leading to enhanced cooling performance of the jet system.

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.