引用本文
  •    [点击复制]
  •    [点击复制]
【打印本页】 【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

过刊浏览    高级检索

本文已被:浏览 167次   下载 35  
内混式核子器临界成雪高度的测量分析
赵巍, 韩雅倩, 张华, 陈鹏举, 傅俊元
0
(上海理工大学 能源与动力工程学院)
摘要:
为探究人工造雪机内混式单孔核子器的临界成雪高度,采用工业显微镜观察雪晶微观结构,测量临界成雪高度阈值,并分析气水压力比(0.4MPa:0.4MPa、0.5MPa:0.45MPa、0.5MPa:0.4MPa)及环境温度(-5℃、-10℃、-15℃)对临界成雪高度的影响。结果表明:在气水压力比为0.4MPa:0.4MPa的工况下,当温度为-5℃和-10℃时,临界成雪高度阈值不存在,当温度-15℃时,能够成雪,临界成雪高度阈值为50~55cm;当气水压力比为0.5MPa:0.45MPa、0.5MPa:0.4MPa时,3个环境温度条件均能成雪,并且气水压力比和环境温度对临界成雪高度有一定的影响,在相同环境温度下,气水压力比越大,临界成雪高度越小;在保持气水压力比不变的情况下,随着环境温度从-15℃上升到-5℃,临界成雪高度则随之增加。当气水压比为0.5MPa:0.45MPa时,临界成雪高度随温度变化趋势较大,温度对临界成雪高度产生的影响较大。研究结果可为造雪机核子器与喷嘴之间的优化布置设计提供依据。
关键词:  人工造雪  内混式核子器  临界成雪高度  气水压力比  环境温度
DOI:
投稿时间:2023-12-20  修订日期:2024-01-22   录用日期:2024-04-02
基金项目:国家重点研发计划项目
Measurement and analysis of the critical snow formation height of an internally mixed nucleonator
Abstract:
In order to investigate the critical snow formation height of the mixed single-aperture nucleator within the artificial snow machine, an industrial microscope was used to observe the microstructure of the snow crystals, measure the critical snow formation height threshold, and analyse the effect of the air-to-water pressure ratio (0.4MPa:0.4MPa, 0.5MPa:0.45MPa, and 0.5MPa:0.4MPa) and the ambient temperatures (-5℃, -10℃, and -15℃) on the critical snow formation height. The results showed that under the working condition of air-water pressure ratio of 0.4MPa:0.4MPa, when the temperatures were -5℃ and -10℃, the threshold of critical snow formation height did not exist, and when the temperature was -15℃, it was able to form snow, and the threshold of critical snow formation height was 50~55cm; when the air-water pressure ratios were 0.5MPa:0.45MPa, 0.5MPa:0.4MPa, the three ambient temperatures can form snow. And the gas-water pressure ratio and ambient temperature will have a certain effect on the critical snow height, under the same ambient temperature, the larger the gas-water pressure ratio, the smaller the critical snow height; The critical snow formation height increases as the ambient temperature increases from -15°C to -5°C while keeping the air-water pressure ratio constant. When the gas-water pressure ratio is 0.5MPa:0.45MPa, the trend of critical snow formation height with temperature is larger, and the temperature has a greater impact on the critical snow formation height. The results of the study can provide a basis for the design of the optimized arrangement between the nucleator and the nozzle of the snow-making machine.
Key words:  Artificial snow-making  internal mixed nucleonator  Critical snow height  Air-water pressure ratio  environmental temperature

用微信扫一扫

用微信扫一扫