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室外造雪机用核子器两相流动过程与雾化规律研究
郝亚辉1,2, 吴海峰1,2, 徐荣吉1,2, 张华3,4, 王瑞祥1,2
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(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 2.北京;3.上海理工大学能源与动力工程学院 4.上海)
摘要:
核子器对促进人工造雪的液滴快速成核、结晶、成雪过程具有重要的作用。本文针对室外造雪机用的通用核子器,设计可视化实验平台,研究了核子器内部气液两相流动过程以及对雾化行为的影响规律。结果表明:核子器内部呈两相环形流动,外部形成了连续的空锥形喷雾场。随着气液压力比(GLR)的增加,界面扰动波在内部气液两相流动过程中逐渐消失。随着空气核占据更多的空间,液膜厚度逐渐减小且变得均匀稳定,雾化效率和雾化质量都得到显著提升。当GLR从20%增加到67%时,液滴分布的均匀性和稳定性分别提高了17%和60%。这项工作可为高性能核子器结构设计提供重要指导。
关键词:  室外造雪机  核子器  内部流型  粒径分布  科技冬奥
DOI:
投稿时间:2023-12-26  修订日期:2024-02-12   录用日期:2024-04-02
基金项目:国家自然科学基金项目(52306220)
Study on Two-phase Flow Process and Atomization Law of Nucleator Nozzle for Outdoor Snow Maker
Abstract:
The nucleator nozzle plays an important role in promoting the rapid nucleation, crystallization, and snow formation process of droplets of artificial snow. In order to study the gas-liquid two-phase flow process inside the nucleator nozzle and its influence on atomization behavior, a visual experimental platform was designed in the paper. The results show that there is two-phase annular flow inside the nucleator nozzle, and a continuous hollow cone spray field is formed external. As the gas-liquid pressure ratio (GLR) increases, interface disturbance waves gradually disappear at the gas-liquid interface of the internal flow. As the air core occupies more space, the liquid film thickness gradually decreases and becomes uniform and stable, and the atomization efficiency and quality are significantly improved. When the GLR increased from 20% to 67%, the uniformity and stability of droplet distribution increased by 17% and 60%, respectively. This work can provide important guidance for the structural design of high-performance atomization components.
Key words:  outdoor snow maker  nucleator nozzle  internal flow pattern  droplet distribution  science and technology winter olympics

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