冻结过程冰黏附界面应力特性规律与分析  

Stress characteristic of ice adhesion interface during freezing process

作　　者：陈奕颖 金敬福[1,2] 王家旭 齐迎春 王琳[3] 陈廷坤 CHEN Yi-ying;JIN Jing-fu;WANG Jia-xu;QI Ying-chun;WANG Lin;CHEN Ting-kun(College of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China;Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China;State Key Laboratory of Power System of Tractor,Luoyang 471039,China)

机构地区：[1]吉林大学生物与农业工程学院,长春130022 [2]吉林大学工程仿生教育部重点实验室,长春130022 [3]拖拉机动力系统国家重点实验室,河南洛阳471039

出　　处：《吉林大学学报（工学版）》2022年第10期2466-2473,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省科技厅项目(20220101215JC);国家自然科学基金青年项目(52205309);吉林省教育厅项目(JJKH20211070KJ);拖拉机动力系统国家重点实验室开放课题(SKT2022002);吉林大学研究生创新研究基金项目(101832022CX022).

摘　　要：根据水/冰和铝合金的热膨胀系数差异及水结冰相变膨胀特性,观察水在铝合金表面的冻结过程,并利用应变测试方法间接获取结冰界面应力变化规律。结合水滴在铝合金表面冻结过程中的形态特征,分析了结冰过程冻结界面切向黏附力的形成规律及产生特点。试验发现,在冻结过程中,随着环境温度的降低,水与铝合金间的界面应变先逐渐降低;当铝合金表面附着水发生相变时,结冰黏附界面应变迅速增加;待铝合金表面附着水完全冻结后,黏附界面应变趋于稳定。分析表明,低温环境里铝合金表面附着水进入过冷状态,水及铝合金基底收缩,界面应变降低;当水开始相变,与基底表面接触区域附着水相变冻结,伴随冰黏附现象的产生,咬合并黏附于界面,相变膨胀力克服铝合金基底的收缩应力,界面应变迅速增加;待附着水完全冻结结冰及环境温度稳定时,冰与铝合金间形成稳定的黏附界面,结冰黏附界面应力趋于稳定。研究结冰黏附界面应力特性有助于阐释结冰黏附及其强度的形成规律,为工程领域开发或优化过程干预式防除冰技术提供理论支撑。According to the difference of thermal expansion coefficients between water/ice and aluminum alloy,and the phase change expansion characteristics of water during the freezing process,the freezing process of water on the aluminum alloy surface was observed.And the freezing interface stress was obtained indirectly by using the strain test method.Combined with the morphological characteristics of water in the freezing process of aluminum alloy surface,the formation law of tangential adhesion force at the freezing interface during the freezing process and the generation characteristics were analyzed.It was found that during the freezing process,the interfacial strain between water and aluminum alloy first decreased gradually as the ambient temperature decreased.When the water attached to the aluminum alloy surface began to phase change,the freezing interface strain increased rapidly.After the water attached to the aluminum alloy surface was completely frozen,the freezing interface strain tended to stabilize.The analysis showed that in the low-temperature environment,the water attached to the aluminum alloy surface entered the supercooled state.And the water and aluminum alloy substrate shrank,and the interface strain decreased.When the water started phase change,the water attached to the substrate surface began to freeze into ice.And the accreted ice bit and adhered to the material surface,the phase change expansion force overcame the shrinkage stress of the aluminum alloy substrate,and the interface strain increased rapidly.Moreover,when the attached water was completely frozen and the ambient temperature stabilized,a stable adhesion interface was formed between the ice and aluminum alloy,and the ice adhesion interface stress was formed.Finally,studying the interfacial stress characteristics of icing adhesion could help explain the formation of the law of icing adhesion and its strength.Also,it would provide theoretical support for the developing or optimizing of process intervention anti-icing technology in the eng

关 键 词：冰黏附 结冰界面 冻结过程 界面切向应力 结冰黏附强度 

分 类 号：TB131[理学—物理]