A Review on Thermo-fluidic Study of Droplets Impact in Spray Cooling

IF 1.7 4区工程技术 Q3 THERMODYNAMICS Heat Transfer Research Pub Date : 2024-07-01 DOI:10.1615/heattransres.2024053386

Xuan Gao, Yuhang Li, Yakang Xia, Haiwang Li

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Abstract

Spray cooling exhibits outstanding cooling performances compared to other liquid cooling techniques, which offers robust thermal management for numerous applications facing high heat flux challenges. In spray cooling, coolant droplets generated from a spray nozzle continuously impinge onto a hot surface at high flow rates. The interaction between the droplets and the surface-whether they land on a pre-existing liquid film or directly on the heated area depends on the fluid's saturation temperature and the surface's temperature. Understanding the dynamics and heat transfer during droplet impact is crucial for advancing spray cooling research. The present work summarizes the recent advancements in the study of droplet impact dynamics and heat transfer in spray cooling from two aspects. The first aspect is about the statistical analyses of droplet behaviors and liquid film conditions in spray cooling, examining their influence on cooling efficiency. The second one is regarding the droplet-surface interactions in spray cooling, ranging from single droplet to spray by increasing the complexity of droplet condition and surface condition. It includes the single droplet impacting a dry heated surface, multiple droplets impacting a dry heated surface, and droplet impacting the heated flowing film.

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喷雾冷却中液滴撞击的热流体研究综述

与其他液体冷却技术相比，喷雾冷却技术具有出色的冷却性能，可为众多面临高热流量挑战的应用提供强大的热管理功能。在喷雾冷却过程中，从喷嘴中产生的冷却剂液滴会以高流速持续撞击热表面。液滴与表面之间的相互作用--是落在预先存在的液膜上，还是直接落在受热区域上，取决于流体的饱和温度和表面温度。了解液滴撞击过程中的动力学和热传递对于推进喷雾冷却研究至关重要。本研究从两个方面总结了喷雾冷却中液滴撞击动力学和热传递研究的最新进展。第一方面是关于喷雾冷却中液滴行为和液膜条件的统计分析，研究它们对冷却效率的影响。第二个方面是喷雾冷却中液滴与表面的相互作用，通过增加液滴条件和表面条件的复杂性，从单个液滴到喷雾。它包括单个液滴撞击干燥的加热表面、多个液滴撞击干燥的加热表面以及液滴撞击加热的流动薄膜。

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来源期刊

Heat Transfer Research 工程技术-热力学

CiteScore

3.10

自引率

23.50%

发文量

102

审稿时长

13.2 months

期刊介绍： Heat Transfer Research (ISSN1064-2285) presents archived theoretical, applied, and experimental papers selected globally. Selected papers from technical conference proceedings and academic laboratory reports are also published. Papers are selected and reviewed by a group of expert associate editors, guided by a distinguished advisory board, and represent the best of current work in the field. Heat Transfer Research is published under an exclusive license to Begell House, Inc., in full compliance with the International Copyright Convention. Subjects covered in Heat Transfer Research encompass the entire field of heat transfer and relevant areas of fluid dynamics, including conduction, convection and radiation, phase change phenomena including boiling and solidification, heat exchanger design and testing, heat transfer in nuclear reactors, mass transfer, geothermal heat recovery, multi-scale heat transfer, heat and mass transfer in alternative energy systems, and thermophysical properties of materials.