Influence of length of train formation and vestibule diaphragm structure on aerodynamic drag of high speed train model
Influence of length of train formation and vestibule diaphragm structure on aerodynamic drag of high speed train model
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发表时间：
2012
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通讯作者：
Jia Ke-lin
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作者：
Jia Ke-lin
通过风洞试验研究了高速列车模型从2车编组到6车编组时各车气动阻力的分布规律，以及3车编组时2种风挡结构对列车模型各车气动阻力的影响。当列车编组数大于3时，头车和尾车的阻力系数随编组数的增加变化不大，中间汽车的阻力系数约为0.1。1辆头车+N辆中间汽车+1辆尾车编组时的整车阻力系数可用1辆头车+0.1×N +1辆尾车阻力系数之和估算高速列车模型中各车气动阻力的不同分布是由1号和2号两种不同形式的前隔板引起的，但前隔板结构对列车整体气动阻力的影响不大。
The wind tunnel test is carried out to study the distribution regularity of aerodynamic drag of each car of the high speed train models from 2-car to 6-car formation,and the affect of 2 types of vestibule diaphragm structure on aerodynamic drag on each car of the train model under 3-car formation.The results indicate: while the train formation is more than 3,the changes of drag coefficients of head car and tail car are little with increase of the number of train formation,and the drag coefficients of middle cars are about 0.1.The drag coefficient of entire train under the formation of 1 head car plus N middle cars plus 1 tail car could be estimated by sum of 1 head car plus 0.1×N plus 1 tail car drag coefficient results of 3-car formation.The different distributions of aerodynamic drag among each car of the high speed train model are caused by two different types of vestibule diaphragm 1 and 2,but the affect of vestibule diaphragm structure on aerodynamic drag of the entire train is small.