摘要
采用Fluent 18.2建立了双喷嘴在风洞中的喷淋模型,研究了双喷嘴布置间距及入口空气速度、干球温度、相对湿度对蒸发冷却性能的影响,研究发现:双喷嘴布置间距0.6、1.0、1.4m对应的最高降温幅度分别为7.8、7.4、7.4℃,对应的最大冷却影响区域面积分别为1.49、1.62、1.59m2;入口空气速度建议取2~3m/s为佳;高干球温度、低相对湿度均有利于蒸发冷却,但是其受制于当地环境。对于双喷嘴的蒸发冷却过程,需结合冷却影响区域的传热速率、平均温度、面积以及风洞长度进行分析。针对不同的应用场合,应根据应用的要求和场地等,结合冷却均匀性好、冷却温降大、喷嘴数量少的目标,选择合适的喷嘴布置间距,合理设计喷淋蒸发冷却系统。
The model of two-nozzle spray in wind tunnel was established by Fluent 18.2 in this paper.The effects of the two-nozzle distance,inlet air velocity,inlet air dry-bulb temperature and relative humidity on evaporative cooling performance were investigated.The results show that the corresponding maximum scale of drop in temperature of 0.6,1.0,1.4 m distance between two nozzles is 7.8℃,7.4℃and 7.4℃,respectively,and the corresponding maximum area of cooling affected zone is 1.49 m2,1.62 m2,1.59 m2,respectively.The inlet air velocity is recommended to be 2~3 m/s.High dry bulb temperature and low relative humidity are conducive to evaporation cooling,but they are subject to local environment.For the evaporation cooling process of two-nozzle model,it is necessary to analyze it combined with the heat transfer rate,average temperature,area of cooling affected zone and the length of the wind tunnel.The proper nozzle distance should be selected combined with the goals of good cooling uniformity,large cooling temperature drop and small amount of nozzles,to design the spray evaporation cooling system reasonably according to different application occasions,requirements and sites.
作者
刘严雪
何锁盈
张治愚
闫明暄
王蕊
高明
孙奉仲
LIU Yanxue;HE Suoying;ZHANG Zhiyu;YAN Mingxuan;WANG Rui;GAO Ming;SUN Fengzhong(School of Energy and Power Engineering,Shandong University,Jinan 250061,Shandong Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第15期4910-4918,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(51776111)
山东大学青年学者未来计划(2018WLJH73)
山东省自然科学基金项目(ZR2017QEE010)。
关键词
喷嘴
布置间距
蒸发冷却
冷却影响区域
传热速率
nozzle
arrangement distance
evaporative cooling
cooling affected zone
heat transfer rate
作者简介
刘严雪(1995),女,硕士研究生,主要研究方向为传质传热及空冷塔优化,17854227383@163.com;通信作者:何锁盈(1987),男,山东大学副研究员,硕士生导师,主要从事传;热传质理论及其工程应用方面的研究工作,suoyinghe@hotmail.com.
