射流撞击过程中横流对光滑和带肋矩形和弯曲通道的影响

IF 6.1 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2025-04-10 DOI:10.1016/j.applthermaleng.2025.126470

Suresh Gogada, Alankrita Singh, Sushanta Dutta

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引用次数: 0

摘要

横流是一种重要的冲击冷却现象，它对传热有着复杂的影响。在实际情况下，涉及多射流和带肋弯曲和带肋矩形通道。因此，在燃气轮机叶片冷却、电子冷却和换热器设计等实际应用中，有必要了解弯曲通道和矩形通道多射流碰撞的流动物理和换热特性，以优化冷却策略。本文通过分析无横流多射流撞击、有横流多射流撞击、矩形和弯曲通道上有横流和肋的多射流撞击三种构型来解决这一问题。射流雷诺数为7500，吹气比为0.25。引入横流后，矩形通道和弯曲通道的最大滞止努塞尔数值分别降低27%和49%。相反，在矩形和弯曲通道中引入横流和肋时，平均努塞尔数值增加。肋状弯曲通道的第一射流和第二射流的射流偏转角分别比横流肋状矩形通道的射流偏转角高7%和14%。矩形通道的平均努塞尔数比相应的弯曲通道高17%，泵送功率要求低11%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effect of crossflow on smooth and ribbed rectangular and curved channels during jet impingement

The crossflow is a crucial impingement cooling phenomenon, and it has a complex impact on heat transfer. In practical scenarios, multi-jets and ribbed curved and ribbed rectangular channels are involved. Therefore, it is necessary to understand flow physics and heat transfer characteristics of multi-jet impingement of curved and rectangular channels under crossflow to optimize the cooling strategies in practical applications of gas turbine blade cooling, electronics cooling, and heat exchanger design. The present numerical study addresses this gap by analyzing three configurations: multi-jet impingement without crossflow, multi-jet impingement with crossflow, and multi-jet impingement with crossflow and ribs on rectangular and curved channels. A jet Reynolds number of 7500 and a blowing ratio of 0.25 were used in this study. The maximum stagnation Nusselt number values of rectangular and curved channels are decreased by 27 % and 49 %, respectively, with the introduction of crossflow. In contrast, it is observed that average Nusselt number values increase when crossflow and ribs are introduced in rectangular and curved channels. The jet deflection angles of ribbed curved channels’ first and second jets are 7 % and 14 % higher than those of ribbed rectangular channels with crossflow. The average Nusselt number is 17 % higher for the rectangular channel over the corresponding curved channel with an 11 % lower pumping power requirement.

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.