不同振动条件下水平冷表面上液滴冻结过程数值模拟

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (23) : 86-93.

论文

不同振动条件下水平冷表面上液滴冻结过程数值模拟

陈清华1,2,3，盛恩1，张斌1，季家东1，王建刚1,3，刘萍1

作者信息 +

Numerical simulation of droplet freezing process on horizontal cold surface under different vibration conditions#br#

CHEN Qinghua1,2,3, SHENG En1, ZHANG Bin1, JI Jiadong1, WANG Jiangang1,3, LIU Ping1

Author information +

文章历史 +

摘要

液滴冻结作为结霜初期霜层生长的初始开端，对后续霜层生长发挥着关键作用。为研究液滴在振动条件下的冻结规律，通过对水平冷表面添加正弦周期性振动条件进行数值模拟分析，并搭建实验平台进行验证。研究结果发现：振动条件改变了固液相界面形态，缩短了液滴完全冻结时间，其中改变振动频率和振动幅值均会加快液滴冻结；液滴冻结前期，受凝固放热和固相成长影响，测点温度变化呈现先慢后快再趋于平缓的趋势，测点温度平均变化速率与振动频率和振动幅值成正比；液滴冻结过程中，相界面波动程度主要受振动幅值和液滴大小影响，体积恒定时，振动幅值越大，相界面波动程度越明显，相同振动条件下，液滴体积越小，相界面波动程度越明显。

Abstract

Droplet freezing plays a crucial role in the growth of subsequent frost layers as the initial beginning of frost formation. To study the freezing law of liquid droplets under vibration, numerical simulation analysis was conducted by adding sinusoidal periodic vibration conditions to a horizontal cold surface, and an experimental platform was constructed for verification. The research results found that vibration conditions changed the morphology of the solid-liquid interface, shortened the time required for complete freezing of droplets, and changing the vibration frequency and amplitude would accelerate droplet freezing; In the early stage of droplet freezing, due to the influence of solidification heat release and solid phase growth, the temperature change at the measuring point shows a trend of first slow, then fast, and then tends to be gentle. The average rate of temperature change at the measuring point is directly proportional to the vibration frequency and amplitude; During the freezing process of droplets, the fluctuation degree of the phase interface is mainly affected by the vibration amplitude and droplet size. When the volume is constant, the larger the vibration amplitude, the more obvious the fluctuation degree of the phase interface. Under the same vibration conditions, the smaller the droplet volume, the more obvious the fluctuation degree of the phase interface.

导出引用

陈清华1, 2, 3, 盛恩1, 张斌1, 季家东1, 王建刚1, 3, 刘萍1. 不同振动条件下水平冷表面上液滴冻结过程数值模拟[J]. 振动与冲击, 2024, 43(23): 86-93

CHEN Qinghua1, 2, 3, SHENG En1, ZHANG Bin1, JI Jiadong1, WANG Jiangang1, 3, LIU Ping1. Numerical simulation of droplet freezing process on horizontal cold surface under different vibration conditions#br#[J]. Journal of Vibration and Shock, 2024, 43(23): 86-93

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