Liquid film flow and heat transfer model under spray impact

QI Hang; ZHANG Wei; GONG Liang

doi:10.11949/j.issn.0438-1157.20171067

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Liquid film flow and heat transfer model under spray impact

更新时间：2025-12-10

- Liquid film flow and heat transfer model under spray impact
- CIESC Journal Issue 5, Pages: 2014-2022(2018)
- 作者机构：
  
  中国石油大学储运与建筑工程学院,山东,青岛,266580
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171067
  CLC： K124
- Online First：05 May 2018，
  
  Published：05 May 2018
- 稿件说明：
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QI Hang, ZHANG Wei, GONG Liang. Liquid film flow and heat transfer model under spray impact[J]. CIESC Journal, 2018, (5): 2014-2022.
DOI：

QI Hang, ZHANG Wei, GONG Liang. Liquid film flow and heat transfer model under spray impact[J]. CIESC Journal, 2018, (5): 2014-2022. DOI： 10.11949/j.issn.0438-1157.20171067.

摘要

针对现有喷雾冷却计算模型的不足，以质量、动量、能量守恒方程为基础，建立喷雾冷却非沸腾区的液膜流动与传热方程，并采用数量级分析的方法对方程简化，最后运用数值方法对模型进行求解。给定液滴速度及液体温度，由模型计算液膜厚度、平均热通量与液体流出温度，与实验测试结果对照。结果显示，液膜厚度的计算结果与实验结果相差6%以内；平均热通量和液体离开待冷却表面的最终温度计算结果与实验结果相差10%以内，且超过60%的计算结果偏差小于5%。计算结果与实验结果的高度匹配证明该模型可较好地反映喷雾冷却过程的流动与换热。由模型可以获取不同位置处液膜厚度与温度，从而加深对喷雾冷却传热机理的理解。

Abstract

Aiming at the shortcomings of the existing calculation model in spray cooling

based on mass

momentum and energy conservation equations

the liquid film flow and heat transfer equations of spray cooling in non-boiling region are established

and magnitude analysis method is applied to simplify equations

and numerical method is used to solve the model. Based on the given values of droplet velocity and temperature

the film thickness

average heat flux and liquid outflow temperature are solved by the model

then the calculated results are compared with the experimental results. The comparison results show that the liquid film thickness difference is less than 6%. The difference of average heat flux and final liquid temperature is less than 10%

and the results that difference less than 5% account for more than 60%. The excellent agreement between simulation and experiment confirms that this model can reasonably reflect flow and heat transfer in spray cooling. The calculated results of film thickness and temperature can deepen the understanding of spray cooling heat transfer mechanism.

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