覆冰导线临界融冰电流数值模拟分析

Numerical Simulation Analysis on Critical Deicing Current of Iced Conductor

使用基于ANSYS-FLUENT软件的数值模拟方法计算临界融冰电流,并探究环境条件、冰层类型和冰体厚度对其影响;采用k-omega湍流模型中的切应力输运(shear stress transport,SST)模型对覆冰导线周围流场进行仿真分析,结果表明:环境温度越高,临界融冰电流越小;环境风速越高,临界融冰电流越大;冰层导热系数越大,临界融冰电流越大;在冰体厚度小于25 mm时,冰体越厚,临界融冰电流越大。仿真结果与实验结果误差小于10%,故数值模拟方法可以预测临界融冰电流值。

A numerical simulation method based on ANSYS-FLUENT software was used to calculate critical deicing current and influence of environmental conditions, icing layer types and ice thickness was discussed. Shear stress transport （SST） model in the k-omega turbulence model was adopted to analyze flow field around the icing conductor by simulation. Result indicates the environmental temperature is higher, critical deicing current is smaller. And, the environmental air velocity is higher, critical deicing current is larger. In addition, heat conductivity coefficient of the icing layer is large, critical deicing current is larger. When ice thickness is less than 25 mm, ice is thicker, critical deicing current is larger. The error between simulation result and experimental result is less than 10% , which proves that this numerical simulation method can predict critical deicing current value.