铁道科学与工程学报2017，Vol.14Issue(9)：1805-1813,9.
受电弓下沉对高速列车气动阻力的影响
Influence of pantograph subsidence on high-speed train aerodynamic drag
摘要
Abstract
Numerical simulation design of pantograph subsidence was performed by using a CFD method, and the influenced heights of pantograph subsidence on aerodynamic drag's characteristics of high-speed trains were analyzed. The results show that the positive pressure on windward surface of the lower part of the pantograph decreased and the negative pressure on the leeward side increased which reduced the pressure differences between the lower front and the back of the pantograph and also reduced the aerodynamic drag's force of the pantograph. When the pantograph subsidence heights were increased to 450 mm, the aerodynamic drag's force of the pantograph and its characteristics of the vehicle were found to have been optimized greatly, which decreased to 52.92% and 6.19% respectively. The profile shapes of the pantograph installation platforms slightly changed the pressure distributions on the lower part of the pantograph, hence, affecting the aerodynamic drag of the pantograph. The aerodynamic drag's maximum difference of the pantograph under different profile shapes went up to 20.78% and the resistance of the whole vehicle also went up to 1.68%. The rectangular installation platform had the best performance on the aerodynamic drag's reduction.关键词
受电弓/下沉高度/轮廓外形/气动阻力Key words
pantograph/subsidence/profile shape/aerodynamic drag分类
交通工程引用本文复制引用
孔学舟,杨明智..受电弓下沉对高速列车气动阻力的影响[J].铁道科学与工程学报,2017,14(9):1805-1813,9.基金项目
国家自然科学基金资助项目(11372360) （11372360）
湖南省自然科学基金资助项目(14JJ3028) （14JJ3028）
