| 摘要: |
| 在北京冬奥推动下国内冰雪行业的迅速发展,但人造雪的质量仍然制约行业发展,目前研究表明人工造雪质量与喷雾场的粒径分布息息相关,而液滴的粒径分布不仅受造雪喷雾场液滴的碰撞、聚合、分离的影响,还受到喷嘴间距分布的影响,优化造雪系统喷嘴分布可以有效提高人工造雪的质量,且进一步促进冰雪行业的发展。本文通过气液混合式人工造雪系统研究了气液混合比(GLR)和喷嘴间距对人工造雪粒径的影响,采用PIV系统和粒度仪分别研究了雾化后喷雾场整体形貌和液滴粒径分布。研究得出,随着气液混合比的增大喷雾场整体形貌呈现收缩趋势,液滴平均粒径最小处位于喷嘴正下方。当气液混合比(GLR)不变时,双喷嘴间的干涉现象随喷嘴间距的减小而增大,索特平均直径随轴向距离增大而增大,随径向距离变化呈现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： |
| 投稿时间：2022-09-04 修订日期：2022-10-09
录用日期：2022-10-31 |
| 基金项目: |
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| Study on The overall Morphology and Particle Size Distribution of Air-liquid Mixed Artificial Snowmaking Spray Field |
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| Abstract: |
| The domestic ice and snow industry is growing rapidly under the impetus of the Beijing Winter Olympics, but the quality of artificial snow still restricts the industry"s development, the present study indicates that artificial snow quality is closely related with the particle size distribution of spray field, and the droplet size distribution were created not only snow spray of droplets collision, the influence of the polymerization, separation, also under the influence of nozzle spacing distribution, Therefore, optimizing the nozzle distribution of snow making system can effectively improve the quality of artificial snow making and promote the development of snow and ice industry. In this paper, the effects of gas-liquid mixing ratio (GLR) and nozzle spacing on the particle size of artificial snow were studied by gas-liquid mixed artificial snow making system. The PIV system and particle size meter were used to study the overall morphology of spray field and droplet size distribution after atomization. The results show that with the increase of the gas-liquid mixing ratio, the overall morphology of the spray field shows a shrinking trend, and the lowest average droplet size is located just below the nozzle. When the gas-liquid mixing ratio (GLR) is unchanged, the interference between the two nozzles increases with the decrease of the nozzle spacing, and the Sauter mean diameter increases with the increase of the axial distance, showing an M-shaped distribution with the change of the radial distance. |
| Key words: Artificial snow particle size distribution gas-liquid mixing ratio nozzle spacing |
