文章摘要
谢红太.强侧风作用下带制动风翼板高速列车周围流场结构分析[J].,2022,62(2):188-196
强侧风作用下带制动风翼板高速列车周围流场结构分析
Analysis of flow field structure around high-speed train with brake wind wing panel under strong crosswind
  
DOI:10.7511/dllgxb202202011
中文关键词: 高速列车  空气动力学  气动特性  制动风翼板  风阻
英文关键词: high-speed trains  aerodynamics  aerodynamic characteristics  brake wind wing panel  air resistance
基金项目:兰州交通大学青年科学基金资助项目(2017011,2019015);华设设计集团股份有限公司科技项目(KY2021075).
作者单位
谢红太  
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中文摘要:
      基于三维定常不可压的黏性流场N-S及k-ε双方程模型,采用计算流体动力学方法对不同风向角强侧风作用下带制动风翼板高速列车及风翼板表面时均压力分布规律、周围时均流动结构及瞬态流动结构等气动效应进行了数值模拟.初步研究结果表明:强侧风影响下,列车外围流场结构复杂多变,随着风向角在0°~180°内逐渐增大,头车首排制动风翼板前后形成的高压区和低压区、头车司机室上方形成的低压区、尾车司机室与车身连接处形成的低压区及车顶形成的低压区影响范围呈先扩大后逐渐缩小的变化趋势;同时随着风向角的逐渐增大,列车头车和尾车鼻尖处形成的高压区域影响范围逐渐变小、减弱.
英文摘要:
      Based on the three-dimensional steady and incompressible viscous flow field N-S and k-ε double equation model, computational fluid dynamics method is adopted to deal with high-speed trains with brake wind wing panel and the surface of brake wind wing panel under strong crosswinds with different wind direction angles. The aerodynamic effects such as the time-average pressure distribution law, the surrounding time-average flow structure and the transient flow structure are numerically simulated. Preliminary research results show that under the influence of strong crosswinds, the structure of the flow field around the train is complex and changeable. As the wind direction angle gradually increases within 0°-180°, the high pressure area and the low pressure area formed before and after the first row of the brake wind wing panel of the leading vehicle, the low pressure area formed above the driver′s cab of the leading vehicle, the low pressure area formed by the connection between the driver′s cab of the trailing vehicle and the vehicle body, and the low pressure area formed by the roof of the vehicle show a trend of first expanding and then gradually shrinking; at the same time, with the gradually increasing of wind direction angle, the influence range of the high-pressure area formed at the nose tip of the leading and trailing vehicles gradually becomes smaller and weaker.
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