Research progress of kidney vortex and its application in film cooling

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL International Journal of Heat and Fluid Flow Pub Date : 2025-03-01 Epub Date: 2024-12-13 DOI:10.1016/j.ijheatfluidflow.2024.109706

Ang Li, Guoqing Li, Yunhong Ruan, Chenyang Kang, Ruofan Wang, Xingen Lu

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Abstract

Kidney vortex is a typical flow structure formed by the interaction between jet and cross flow. One case where kidney vortex is frequently observed and studied is film cooling: jet from a hole functioning as coolant interacts with a complicated mainstream. In a simplified flat plate model of film cooling, coolant injected from column hole results in kidney vortex in the cross-flow mainstream and it has been proved that kidney vortex has a negative impact on film cooling effectiveness and causes detachment of the coolant. Based on the idea of controlling the flow field to enhance film cooling effectiveness, kidney vortex is studied on the aspects of its structure, classification, unsteady characteristics, entrainment of the mainstream and coolant lift-off. Efforts have also been made to avoid the formation of kidney vortex and to construct other flow structures. In this paper, a review on kidney vortex is made in order to conclude research progress and application of its formation and evolution mechanisms mentioned above. Some existing challenges on the quantitative study of the application of kidney vortex in film cooling are also pointed out.

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肾涡及其在气膜冷却中的应用研究进展

肾涡是射流与横流相互作用形成的一种典型的流动结构。肾涡经常被观察和研究的一个例子是膜冷却：从孔中喷出的射流作为冷却剂与复杂的主流相互作用。在简化的平板气膜冷却模型中，从柱孔注入的冷却剂会在横流主流中产生肾涡，并证明肾涡对气膜冷却效果有负面影响，会导致冷却剂的分离。基于控制流场提高气膜冷却效果的思路，对肾涡的结构、分类、非定常特性、主流夹带和冷却剂升力等方面进行了研究。为了避免肾涡的形成和构建其他流动结构，也做了一些努力。本文就肾涡旋的形成和演化机制的研究进展及应用作一综述。指出了肾涡在气膜冷却中应用的定量研究中存在的一些问题。

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.