室外造雪机用旋流喷嘴雾化性能实验研究  

Experimental Study of Spray Performance of Swirl Nozzle in Outdoor Snow-makers

作　　者：吴艳丽 王瑞祥[1] 张华[2] 孙子乔 徐荣吉[1] 张博文 吴海峰 Wu Yanli;Wang Ruixiang;Zhang Hua;Sun Ziqiao;Xu Rongji;Zhang Bowen;Wu Haifeng(Beijing Engineering Research Centre of Sustainable Energy and Buildings,Beijing University of Civil Engineering and Architecture,Beijing,100044,China;School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,200093,China)

机构地区：[1]北京建筑大学北京市建筑能源综合高效综合利用工程技术研究中心,北京100044 [2]上海理工大学能源与动力工程学院,上海200093

出　　处：《制冷学报》2023年第5期116-122,共7页Journal of Refrigeration

基　　金：国家重点研发计划(2020YFF0303903)资助项目;北京建筑大学研究生教育教学质量提升项目(J2022026)资助。

摘　　要：喷嘴作为室外造雪机成雪过程重要的雾化部件,是决定成雪速率和成雪量的关键。本文针对国产室外造雪机用旋流结构喷嘴,搭建了通用的雾化性能测试装置,研究了供水压力对喷嘴雾化效果和液滴与环境换热表现的影响。结果表明:旋流结构喷嘴雾化过程的低压段,流体呈空心纺锤状,其锥角随压力变化显著,雾化效果较差;而高压段流体呈空心锥状,锥角相对稳定;雾化稳定后,喷嘴的流量随压力进一步提高,索特平均粒径(Sauter mean diameter,SMD)则逐渐降低,雾化锥角稳定在约76°;同时压力升高可缩短喷雾换热至环境温度的时间,表现为更高的热传递效率。研究结果可为高性能雾化部件结构设计提供理论支撑。A swirl nozzle is a vital component in an outdoor snow-maker,directly affecting the rate and amount of snow production.An atomization experimental facility was designed and established to test swirl nozzles in outdoor snow-makers.The influence of the water supply pressure on the atomization effect of the nozzle and the heat transfer performance between water droplets and the environment were experimentally studied.The results showed that the spray shape was a hollow spindle with poor atomization in the low-pressure section.With an increase in the inlet pressure,a dramatic increase in the spray cone angle was observed.At high pressure,the spray shape was a hollow cone with a relatively stable cone angle.When the spray had a stable shape,the mass flow rate increased,the Sauter mean diameter decreased with an increase in the inlet pressure,and the atomization cone angle stabilized at 76°.Moreover,the increased pressure improved the heat transfer efficiency of the spray,resulting in a shorter heat transfer time to the ambient.This study supports the structural design of snow-maker atomization components.

关 键 词：室外造雪机 旋流喷嘴 喷雾 水滴粒径 

分 类 号：TB611[一般工业技术—制冷工程] TB657[轻工技术与工程] TS952.63