Investigation on Substrate Icing Growth Affected by Surface Energy in Cush of Ice Branch

doi:10.16183/j.cnki.jsjtu.2018.08.006

Abstract

Abstract: In this paper, the influence of the degrees of supercooling and free energy of substrate surface on substrate icing was studied through the experiment. Then, this paper analyzed the velocity of substrate icing growth with different surface contact angles theoretically and computationally, and compared with the experimental results. The results show that single ice branch grows on the near adiabatic surface under a low degree of supercooling of 2K. And the free energy of the substrate can rather make a significant effect on the icing rate, instead of the shape of dendrite tips. The scale law of dendrite tips on substrate is similar to that of free icing, and the theoretical calculation and experimental comparison show that the different shapes of dendrite tips cannot completely explain the growth rate changing. Hence, the surface energy is not frozen by heat transfer, but changing the nature of ice.

Key words: supercooled water, substrate icing, contact angle, shape of dendrite tips, tip velocity

CLC Number:

V 241.01

SHEN Jiaying，KONG Weiliang，LIU Hong. Investigation on Substrate Icing Growth Affected by Surface Energy in Cush of Ice Branch[J]. Journal of Shanghai Jiaotong University, 2018, 52(8): 918-923.

References

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