煤气与热力2025，Vol.45Issue(11)：7-15,9.
人工造雪主降温区影响因素模拟研究
Simulation Study on Influencing Factors of Main Cooling Zone of Artificial Snowmaking
摘要
Abstract
Numerical simulation methods were used to study the effects of droplet particle size range,air sup-ply speed,ambient relative humidity,droplet mass flow rate,air duct elevation angle and ambient temperature on the cooling range,cooling amplitude in the main cooling zone of artificial snowmaking,and distance be-tween the main cooling zone and the snowmaker.The temperature distribution in the flow field domain is similar to the distribution of water vapor mass fraction,and the water vapor mass fraction is higher in the lower temperature zone,which verifies that the temperature drop is caused by evaporation and heat absorption of droplets.When the droplet size changes from 0 to 100μm and from 50 to 150 μm,it has little effect on the main cooling zone.With the increase in droplet size,both the cooling amplitude and cooling range decrease,and the main cooling zone gradually approaches the snowmaker.Droplets with a particle size of less than 150 μm have strong diffusivity,which is easier to achieve evaporation and cooling,and is conducive to the formation of local low-temperature snow-forming ar-eas.The cooling range of the main cooling zone in-creases with the increase in air supply speed,and the main cooling zone gradually moves away from the snow-maker,and the cooling range changes little.The cool-ing amplitude of the main cooling zone increases with the decrease in ambient relative humidity,and the changes in the distance between the main cooling zone and the snowmaker as well as the cooling range are not significant.Lower ambient relative humidity is more conducive to droplet evaporation and cooling,forming a better local snow-forming area.With the increase in mass flow of droplets,the main cooling zone gradually approaches the snowmaker,and the cooling amplitude first increases and then decreases,and the cooling range does not change significantly.The cooling effect is best when the droplet mass flow rate is 20-36 t/h.In-creasing the air duct elevation angle reduces the cool-ing range,and the cooling amplitude does not change significantly.When the air duct elevation angles are 30° and 45°,the cooling range and cooling amplitude are close.As the air duct elevation angle increases,the main cooling zone gradually moves away from the snow-maker.Although the smaller elevation angle can in-crease the cooling range to a certain extent,the evapo-ration effect is worse due to the shorter falling time of droplets and less heat exchange time between droplets and air.A larger elevation angle can enhance the evaporative cooling effect,but the cooling range is re-duced.The cooling amplitude of the main cooling zone decreases with the increase in ambient temperature.When the ambient temperature is 273.15 K,the lowest temperature in the main cooling zone is 267.93 K,ris-ing to 273.80 K when the ambient temperature in-creases to 278.15 K.This shows that when the ambient temperature is slightly lower than 273.15 K,local snow formation can be achieved through the evaporation and heat absorption of droplets.关键词
人工造雪/主降温区/降温范围/降温幅度Key words
artificial snowmaking/main cooling zone/cooling range/cooling amplitude分类
通用工业技术引用本文复制引用
宋文昊,吴海峰,徐荣吉,张博文,王瑞祥..人工造雪主降温区影响因素模拟研究[J].煤气与热力,2025,45(11):7-15,9.基金项目
国家重点研发计划"造雪机动态适应性自组网群控物联系统研发"(2020YFF0303904) （2020YFF0303904）
北京建筑大学研究生创新项目(PG2023064) （PG2023064）
北京建筑大学基本科研业务费(X20065) （X20065）
