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中文摘要：
对真空管道高速列车气动阻力特性和系统参数设计方法进行了深入系统研究，建立低压环境下真空管道高速列车的空气动力学计算模型，研究管道压力、阻塞比和列车速度对列车气动阻力的影响。在此基础上，以明线上运行速度为400km／h的高速列车气动阻力为限值，确定出真空管道高速交通系统的最佳管道压力、阻塞比和列车速度关系。研究表明，在低压（1×103—1×104Pa）环境下，真空管道中的空气流动可以采用连续介质模型描述。高速列车的气动阻力系数基本上与管道压力和列车速度无关，主要依赖于阻塞比。高速列车的气动阻力随阻塞比的增加而增大，且与管道压力近似成线性关系，与列车速度近似成平方关系。本文同时给出了真空管道高速交通系统最高经济运行条件下的管道压力、阻塞比和列车速度的计算公式，并由此确定出最佳的管道压力、阻塞比和列车速度关系。
英文摘要：
The characteristics of the aerodynamic drag force of the railway train, running at a high speed in the evac- uated tube, were physically modeled, empirically approximated, and numerically simulated. The impacts of the key factors, including the pressure, blockage ratio and speed, on the drag force were studied. The interdependence of the pressure, blockage ratio, and speed was evaluated, with the drag force on the train nmning in open field at 400 km/h as the criteri- on. The calculated results show that at a pressure in the 1 × 103 - 1 × 104 Pa range, the aerodynamic drag force coefficient depends strongly on the blockage ratio, but rather weakly on the pressure and speed. Depending almost linearly on the pressure and square of the speed, the aerodynamic drag coefficient increases with an increase of the blockage ratio. Be- sides, the four factors, such as the operation cost, pressure, blockage ratio, and speed, were best compromised, based on the newly-derived formula.
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