弓网电弧磁流体动力学模型
MHD Model of Pantograph-catenary Arc
韩伟锋 1高国强 1刘贤汭 1罗蜀彩 1朱光亚 1吴广宁1
作者信息
- 1. 西南交通大学电气工程学院,四川成都 610031
- 折叠
摘要
弓网电弧在接触面上产生的瞬时高温是造成接触面材料烧蚀的主要原因.研究弓网电弧的温度分布特征,有助于改进接触面材料,增强其耐电弧侵蚀能力,进而提高弓网系统服役性能.本文基于磁流体动力学(MHD)理论,考虑电弧的物理参数以及电磁、热和辐射等现象,建立弓网电弧数学模型.通过对流体力学计算软件FLUENT进行二次开发,计算了静态弓网电弧弧柱区域和两极板表面的温度分布.结果表明:电弧极板表面温度低于电弧弧柱温度,受电弓滑板表面温度高于接触网导线表面温度;提高滑板材料的热导率能够有效降低电弧发生时受电弓滑板表面的温度.
Abstract
The transient high temperatures generated by pantograph-catenary arc on the electrode surfaces are the major cause that leads to the serious erosion of the electrode materials.Study on the temperature distribution characteristics of pantograph catenary arc is conducive to the improvement of contact materials and enhancement of the arc erosion resistance ability,so as to further improve the service performance of the pantograph catenary system.Based on MHD theory,considering the physical properties of the arc and the electromagnetic,heat and radiation phenomena,a pantograph-catenary arc mathematical model was established.Fluid dynamics software FLUENT was adapted and extended by self-written routines,and a geometry model of static pantograph-catenary arc was built to simulate the temperature distribution of arc column,arc cathode and arc anode.The results indicated that the temperatures of the surface of electrodes were lower than that of the arc column region,and the surface temperature of pantograph slider was higher than that of the catenary wire.To reduce the surface temperature of pantograph slider when arc occurs,the improvement of the thermal conductivity of materials of pantograph slider is an effective method.
关键词
弓网电弧/MHD模型/温度场/热导率Key words
pantograph-catenary arc/MHD model/temperature field/thermal conductivity引用本文复制引用
基金项目
国家自然科学基金(U1234202)
国家自然科学基金(51177136)
国家自然科学基金(51325704)
“十二五”国家重点基础研究发展计划(973计划)(2011CB711105-4)
“十二五”国家重点基础研究发展计划(973计划)(51325704)
出版年
2015
NETL
NSTL
维普
万方数据