Experimental study on the effects of successive supercooled large droplets impacting

Xu Hong; Kong Weiliang; Wang Fuxin; Liu Hong

doi:10.11729/syltlx20170112

Volume 32 Issue 2

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Journal of Experiments in Fluid Mechanics > 2018 > 32(2): 28-34. > DOI: 10.11729/syltlx20170112

Xu Hong, Kong Weiliang, Wang Fuxin, Liu Hong. Experimental study on the effects of successive supercooled large droplets impacting[J]. Journal of Experiments in Fluid Mechanics, 2018, 32(2): 28-34. DOI: 10.11729/syltlx20170112

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Experimental study on the effects of successive supercooled large droplets impacting

School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China

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Received Date: August 28, 2017
Revised Date: October 16, 2017

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Abstract

The understanding of the impacting-icing mechanism of supercooled large droplet (SLD) is still limited to a single SLD. The interactions between droplets have not been taken into consideration. A high-speed camera is used to record the impacting-freezing process of two SLDs that are offset a certain distance away from each other and successively impact on the substrate. The experiment studies the relationship between the offsets of two SLDs, the time intervals of successive impacts and the freezing morpholog as well as the freezing speed. The experiment shows that the interactions between SLDs can inhibit the SLD shrinkage behavior and prolong the freezing time. The size of the offset affects the shrinkage rate which decides the final freezing morphology. The freezing time of two SLDs decreases rapidly with the slight increase of the offset of two SLDs in a small range. The time interval of the successive impacts is inversely proportional to the freezing time and has a weak effect on the formation of the freezing morphology.
- supercooled large droplet,
- impact,
- offset,
- time interval,
- freezing morphology,
- freezing speed

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