Numerical investigation of the heat transfer characteristics of a water droplet on a high-temperature steel pipe

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-09-05 DOI:10.1016/j.ijthermalsci.2025.110277

Rui Zhang , Zhenlei Li , Jian Kang , Dong Chen , Lijun Wang , Haijun Zhang , Guo Yuan

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引用次数: 0

Abstract

Spray cooling depends on the collective action of myriad microdroplets impacting a hot surface. By studying the heat transfer mechanisms that occur when droplets come into contact with a surface, it is possible to determine the influence of various factors on the cooling efficiency of these droplets. In this paper, the heat transfer behavior of droplet impact on high-temperature steel pipes was studied by using numerical simulation methods. A hot-rolled seamless steel pipe is used to investigate the effects of droplet diameter (1–10 mm) and impact velocity (0.5–4 m/s) on the heat transfer under high temperature conditions. The results show that various process parameters exhibit the same influence pattern on heat transfer for both the inner and outer walls. The maximum heat transfer coefficient increases with the increase in the droplet impact velocity, but the cooling duration gradually decreases with the increase in the impact cooling velocity. At a fixed impact velocity, increasing the droplet diameter decreases the peak heat transfer coefficient. It is worth noting that under the same process parameters, the heat transfer coefficient of the outer wall surface is greater than that of the inner wall.

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高温钢管上水滴传热特性的数值研究

喷雾冷却取决于无数微滴撞击热表面的集体作用。通过研究液滴与表面接触时的传热机理，可以确定各种因素对液滴冷却效率的影响。本文采用数值模拟方法研究了液滴撞击高温钢管的换热行为。以热轧无缝钢管为研究对象，研究了高温条件下液滴直径（1 ~ 10 mm）和冲击速度（0.5 ~ 4 m/s）对传热的影响。结果表明，不同工艺参数对内外壁传热的影响规律相同。最大换热系数随液滴冲击速度的增大而增大，冷却时间随冲击冷却速度的增大而逐渐减小。在一定的冲击速度下，增大液滴直径会降低峰值换热系数。值得注意的是，在相同的工艺参数下，外壁面的换热系数大于内壁。

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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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.