文献类型：期刊文献

英文题名：Analysis of clear ice melting characteristics with a longitudinal temperature gradient under different CO2 laser powers

作者：Zhen, Zekang Song, Mengjie Chen, Yuanhanmin Zhang, Long Ding, Yong

第一作者：Zhen, Zekang

通信作者：Song, MJ[1]

机构：[1]Beijing Inst Technol, Sch Mech Engn, Dept Energy & Power Engn, Beijing 100081, Peoples R China;[2]Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550025, Peoples R China

第一机构：Beijing Inst Technol, Sch Mech Engn, Dept Energy & Power Engn, Beijing 100081, Peoples R China

通信机构：corresponding author), Beijing Inst Technol, Sch Mech Engn, Dept Energy & Power Engn, Beijing 100081, Peoples R China.

年份：2026

卷号：295

外文期刊名：APPLIED THERMAL ENGINEERING

收录：;EI(收录号：20261220332350);Scopus(收录号：2-s2.0-105033427180);WOS:【SCI-EXPANDED(收录号:WOS:001730262400001)】；

基金：This research is funded by the National Natural Science Foundation of China (Grant No. 52576006) , Beijing Municipal Commission of Sci-ence and Technology, Zhongguancun Science and Technology Park Management Committee (Grant No. Z231100006123010) and the Department of Science and Technology of Hebei Province (Grant No. 244A7625D and 254Z4504G) .

语种：英文

外文关键词：Laser power; Temperature gradient; Melting hole; Melting rate; De-icing efficiency

摘要：CO2 laser-based non-contact rapid de-icing is promising for polar engineering. However, existing research is constrained by ideal isothermal conditions, lacking quantitative insight into melting dynamics and energy efficiency under realistic polar longitudinal temperature gradients. Distinct from traditional isothermal tests, we constructed an experimental system simulating the longitudinal temperature gradient of polar ice, investigating the laser-ice interaction mechanism within a non-uniform thermal field for the first time. We proposed three evolutionary stages covering explosion hole forming, radial expanding, and rapid deepening, elucidating the hole-forming process driven by laser energy density under the synergistic effect of melt flow and vapor recoil. Analysis indicates that the gravitational detachment of the water film is critical for triggering the transition from radial expansion to deep penetration, while the high-power-induced vaporization shielding effect constitutes a bottleneck for energy efficiency. Quantitative results show that the temperature gradient reduces the melting rate by 13.5% similar to 29.4% compared to the existing isothermal conditions. While increasing laser power boosts melting rate by 123.79% but decreases energy efficiency non-monotonically from 70.86% to 64.21%. These finding reveals a trade-off mechanism between melting rate and energy efficiency, providing a key basis for optimizing polar de-icing equipment that balances high speed and low energy consumption.