| 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：旋流结构喷嘴雾化发展过程的低心纺锤状，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。 |
| 关键词: 室外造雪机 旋流喷嘴 喷雾 水滴粒径 |
| DOI： |
| 投稿时间：2022-07-22 修订日期：2022-10-09
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| 基金项目:国家重点研发计划项目（2020YFF0303903），北京建筑大学研究生教育教学质量提升项目（J2022026）资助。 |
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| Experimental Study of Spray Performance of Swirl Nozzle in Outdoor Snow-makers |
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Wu Yanli1, Wang Ruixiang1, Zhang Hua2, Sun Ziqiao1, Xu Rongji1, Zhang Bowen1, Wu Haifeng1
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| (1.Beijing Engineering Research Centre of Sustainable Energy and Buildings, Beijing University of Civil Engineering and Architecture;2.School of Energy and Power Engineering, University of Shanghai for Science and Technology) |
| Abstract: |
| 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. |
| Key words: outdoor snow-maker swirl nozzle spray droplet diameter |
