| 摘要: |
| 在北京冬奥会的推动下，国内冰雪产业迅速发展，特别是人造雪场的发展，给人工造雪的雪量和质量提出了更高的要求。目前的研究表明，人工造雪的质量与其喷雾场中液滴粒径分布息息相关，且液滴粒径分布不仅受到液滴碰撞、聚合、分离的影响，还受到人工造雪系统喷嘴间距分布的影响。因此,本文采用PIV系统和粒度仪测定了由气液混合式人工造雪系统经两个喷嘴雾化产生的喷雾场的整体形貌和液滴粒径分布，以此来研究人工造雪系统的气液质量混合比（gglr）和喷嘴间距对喷雾场中液滴粒径分布的影响。研究结果表明：随着gglr的增大，喷雾场的整体形貌呈向内收缩的趋势，且在喷嘴正下方液滴平均粒径存在最小值，而当gglr不变时，双喷嘴间的干涉现象随喷嘴间距的减小而增大，液滴的索特平均直径在随轴向距离增大而增大的同时，随径向距离的变化呈m型分布。 |
| 关键词: 人工造雪 粒径分布 气液混合比 喷嘴间距 |
| DOI： |
| Received:September 04, 2022Revised:October 09, 2022 |
| 基金项目: |
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| Study of Overall Morphology and Particle-size Distribution of Spray Field in Gas–liquid Mixed Snow-makers |
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Hu Hengxiang, Liu Bin, Bi Lisen, Zeng Tao, Li Jiawei
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| (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce) |
| Abstract: |
| Since the Beijing Winter Olympic Games, the domestic ice and snow industry has grown rapidly, driven particularly by artificial snow parks with higher requirements in terms of both the quantity and the quality of artificial snow. This research showed that the quality of artificial snow was closely related to the droplet size distribution in the spray field. The droplet size distribution was affected by droplet collision, polymerization, and separation, as well as the nozzle distribution of the artificial snow-making system. Therefore, PIV and particle sizing systems were used to measure the overall morphology and droplet size distribution of the spray field generated by atomization of the gas-liquid mixed artificial snow-making system to study the effects of the gas-liquid mass ratio (gglr) and nozzle spacing on the droplet size distribution of the spray field. Our results showed that with an increase in gglr, the overall morphology of the spray field exhibited an inward shrinking trend, and the minimum average droplet size occurred below the nozzles. When gglr was constant, the interference between the two nozzles increased with a decrease in nozzle spacing, and the average droplet diameter increased with an increase in the axial distance, presenting an M-shaped distribution with a change in the radial distance. |
| Key words: artificial snow particle-size distribution gas-liquid mass ratio nozzle spacing |
