喷雾降温系统中纯水液滴群蒸发域的模拟研究  

Simulation Study on Evaporation Region of Pure Water Droplet Group in Spray Cooling System

作　　者：孟晓静[1,2] 崔雁弼 胡亚年 MENG Xiaojing;CUI Yanbi;HU Yanian(School of Resource Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shanxi,China;State Key Laboratory of Green Building in Western China,Xi'an 710055,Shaanxi,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055 [2]西部绿色建筑国家重点实验室,陕西西安710055

出　　处：《制冷技术》2024年第3期52-59,共8页Chinese Journal of Refrigeration Technology

基　　金：国家重点研发计划(No.2018YFC0705306)。

摘　　要：为了避免喷雾降温系统中液滴沉降到设备及人体表面对工艺及人体热舒适造成影响,需要针对纯水液滴群蒸发域问题进行研究。本文采用计算流体动力学(CFD)方法,研究了喷雾降温系统作用下,不同热源温度、液滴初始粒径对液滴群蒸发域的影响,分析了室内温度分布及液滴粒径分布,探讨了室内热源温度及液滴初始粒径对蒸发域高度的影响规律。结果表明:随着热源温度的增加,热羽流对喷雾射流的抑制作用增强,液滴群的蒸发域随之增大;当液滴初始粒径增大时,液滴群的蒸发域随之减小,喷雾射流范围内的温度随之增加;液滴群蒸发域高度随着热源温度的增加而呈线性增大,随液滴初始粒径的增加而呈线性减小,当热源温度大于400℃,液滴初始粒径大于60μm时,其对液滴群蒸发域高度的影响较小。In order to avoid the impact of droplets falling on the surface of equipment and human body in the spray cooling system and affecting the process and thermal comfort of human body,it is necessary to study the problem of evaporation region of pure water droplet group.In this paper,the computational fluid dynamics(CFD)method is used to study the influence of different heat source temperature and initial droplet size on the evaporation region of the droplet group under the action of the spray cooling system.The indoor temperature distribution and droplet size distribution are analyzed,and the influence of indoor heat source temperature and initial droplet size on the height of the evaporation region is discussed.The results show that with the increase of heat source temperature,the inhibition effect of thermal plume on spray jet is enhanced,and the evaporation region of droplet group increases accordingly.When the initial droplet size increases,the evaporation region of the droplet group decreases,and the temperature in the range of the spray jet increases.The height of droplet group evaporation domain increases linearly with the increase of heat source temperature,and decreases linearly with the increase of the initial droplet size.However,when the heat source temperature is greater than 400°C and the initial droplet size is greater than 60μm,it has little effect on the height of droplet group evaporation region.

关 键 词：喷雾降温系统 热源温度 液滴初始粒径 蒸发域 

分 类 号：TB611[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]