Numerical analysis of crystallization and freezing of flying droplet in artificial snowmaking

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-02-20 DOI:10.1016/j.icheatmasstransfer.2025.108740

Peiwen Dong, Yinlong Li, Guoqiang Liu, Gang Yan

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引用次数: 0

Abstract

Artificial snowmaking is a kind of spray freezing, including heat and mass transfer and crystallization. The freezing process of flying droplets is complex, involving various transient characteristics. In this paper, the aim is to explore the transient characteristics of flying droplet freezing process during artificial snowmaking. A numerical model of flying droplet freezing is established combining with heat transfer theory and crystallization kinetics after experimental validation. The model incorporates the compressible flow, gas throttling, air entrainment and droplet trajectory to reveal the transient properties of flying droplet. The influence of ambient and operating parameters on the freezing time is comprehensively studied, such as the initial droplet temperature, diameter and velocity, the ambient temperature, humidity and pressure and the Mach number of airflow from nozzle. It is found that the influence of ambient temperature, droplet diameter, and Mach number is more significant on droplet freezing. When the ambient temperature is −5 °C and the Mach number is 3, the lowest temperature of 50 μm droplets can reach −7.13 °C. Finally, a critical criterion for snowmaking is proposed, which provides a new approach to compensate for the insufficient ambient temperature by adjusting the initial droplet diameter and Mach number.

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.