| 引用本文: | 梁习锋,熊小慧,易仕和.强侧风作用下棚车气动外形优化.[J].国防科技大学学报,2006,28(2):26-30.[点击复制] |
| LIANG Xifeng,XIONG Xiaohui,YI Shihe.Optimization Research on Aerodynamic Figure of the Box Car under Crosswinds[J].Journal of National University of Defense Technology,2006,28(2):26-30[点击复制] |
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| 强侧风作用下棚车气动外形优化 |
| 梁习锋1, 熊小慧1, 易仕和2 |
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(1.中南大学 轨道交通安全教育部重点实验室，湖南 长沙 410075;2.国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 铁路通用车型中，强侧风作用下棚车的气动性能最差。利用二维定常不可压缩N-S方程、k-ε两方程紊流模型，采用有限体积法对强侧风作用下棚车气动外形进行了优化研究。结果表明，棚车车顶形状对强侧风作用下棚车气动性能有较大影响，圆弧型车顶的P65型棚车气动性优于“人”字型车顶P64型棚车；棚车侧壁和车顶圆弧采用圆弧过渡比直接连接的效果好，综合考虑棚车气动性能和有效容量两方面因素，建议车顶圆弧和过渡圆弧半径分别取2692mm和500mm。 |
| 关键词: 棚车 气动外形 优化研究 数值计算 |
| DOI： |
| 投稿日期：2005-10-30 |
| 基金项目:铁道部科技发展计划项目(2003J019) |
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| Optimization Research on Aerodynamic Figure of the Box Car under Crosswinds |
| LIANG Xifeng1, XIONG Xiaohui1, YI Shihe2 |
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(1.Key Laboratory of Traffic Safety on Track, Central South University，Changsha 410075，China;2.College of Aerospace and Materials Engineering，National Univ. of Defense Technology，Changsha 410073，China)
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| Abstract: |
| Under strong crosswinds, the aerodynamic performance of box car is the worst in the universal vehicles used in the railroad. Using 2D, steady state incompressible Navier-Stokes equation and two equations k-εturbulent model for the box car under strong crosswinds, the optimization of the aerodynamic figure has been carried out by finite volume. Results obtained show that the figure of roof greatly affects the aerodynamic performance of box car. The P65 box car with arch roof has better aerodynamic performance than the P64 box car with slope roof. If the roof arc and the lateral wall could be connected by the round fillet, the aerodynamic performance would be much better. With a consideration of the two factors of aerodynamic performance and the effective volume, it is suggested that the roof arc radius should be 2692mm and the fillet arc radius be 500mm. |
| Keywords: box car aerodynamic figure optimization research numerical analysis |
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