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弓网离线过程中会产生弓网电弧。弓网电弧稳态燃烧时,弧心温度很高。同时,电弧等离子体对接触网导线和受电弓滑板的热传导造成弓网系统材料的电气磨损,降低弓网系统使用寿命,严重情况时会导致列车事故。由于现有试验条件的限制,难以直接采用试验方式准确测试出电弧等离子体的温度分布。因此基于流体动力学理论,建立了弓网电弧稳态燃烧的物理分析模型,并采用流体分析软件,对模型方程进行求解,得出了电弧等离子体、接触线内部以及滑板内部的温度场分布情况。通过仿真计算不同接触线廓形半径情况下接触线内部的温度场分布情况,发现增大廓形半径可以降低接触线表面材料的电气磨损。同时,随着滑板材料热导率的增加,也可以降低滑板材料的电气磨损。
Bow network offline process will produce bow arc. Bow arc steady combustion, the arc core temperature is high. In the meantime, the heat conduction of the arc plasma to the catenary wire and the pantograph skateboard causes the electric wear of the bow net system material, reduces the service life of the bow net system, and may lead to train accidents in severe cases. Due to the limitations of the existing test conditions, it is difficult to directly test the temperature distribution of the arc plasma by using the test method. Therefore, based on the fluid dynamics theory, a physical analysis model of arc steady combustion in bow arc was established, and the fluid equation analysis software was used to solve the model equations. The distribution of temperature field inside the arc plasma, inside the contact line and inside the skateboard was obtained . By simulating the distribution of the temperature field inside the contact line under the different contact line profile radius, it is found that increasing the profile radius can reduce the electrical wear on the contact line surface material. At the same time, as the thermal conductivity of the skateboard material increases, it is also possible to reduce the electrical wear of the skateboard material.