冰刀热物性参数对固液界面结构影响

The Influence of Ice Skate Thermal Properties on the Solid-Liquid Interface Structure

为了探明冰刀热物性参数对固液界面结构的影响,建立了冰刀-冰面滑动摩擦热-结构耦合模型,对摩擦过程进行数值模拟。结果表明,在一定范围内减小冰刀导热系数、比热容都有利于冰面水膜的形成,过度降低热物性参数,对冰面水膜的形成不利,最优冰刀材料导热系数为0.53 W/(m·K),此时界面最高温度为51.1℃,冰面水膜长度为181.58 mm,水膜厚度为1.09 mm;最优冰刀比热容为25.0 J/(kg·K),此时界面最高温度为45.6℃,冰面水膜长度为170.43 mm,水膜厚度为0.65 mm。

In order to ascertain the influence of the thermal physical parameters of ice skates on the structure of the solid-liquid interface,this paper establishes an ice skate-ice sliding friction model,and numerically simulates the friction process.The results show that reducing the thermal conductivity and specific heat capacity of ice skates within a certain range is beneficial to the formation of water film on the ice surface,and excessive reduction of thermal physical parameters is unfavorable to the formation of water film on the ice surface.The optimal thermal conductivity of ice skate materials is 0.53 W/(m·K),the maximum interface temperature is 51.1℃,the water film length on the ice surface is 181.58 mm,and the water film thickness is 1.09 mm;the optimal ice skate specific heat capacity is 25.0 J/(kg·K),and at this time,the maximum interface temperature is 45.6℃,the length of the water film on the ice surface is 170.43 mm,and the thickness of the water film is 0.65 mm.