【摘要】 研究目的:随着列车运行速度的提高，气动阻力逐渐成为行车的主要能耗，而列车在隧道内运行时，气动阻力能耗增加更为显著。本文采用三维数值模拟方法，基于LES紊流模型，对CRH3型列车的气动阻力特性开展研究。研究结论:(1)对列车在明线运行时的气动阻力系数进行分析，并与日本列车测试结果比较，验证了计算结果的可信性；(2)分析得到了在不同阻塞比情况下，列车在隧道内运行的气动阻力系数，回归确定了列车气动阻力系数与隧道阻塞比服从指数函数关系，并给出了气动阻力系数预测公式；(3)将所得公式应用于对双车头列车在隧道运行的气动阻力系数预测以及真空管道等气动阻力参数设计，验证了其可信性和实用性；(4)本研究成果可为列车隧道气动阻力系数相关的分析、设计提供指导。更多还原

【Abstract】 Research purposes: With the increase of the train running speed, aerodynamic drag will become the main role resulting in energy consumption. While train running in tunnel, the energy consumption of aerodynamic drag will enhance remarkably. In this paper, using three-dimensional model, based on LES(large eddy simulation) turbulence model, the aerodynamic drag characteristic of CRH3 train model was analyzed.Research conclusions:(1) The aerodynamic drag coefficients of the train running in the open air were obtained. By comparing the results with Japanese test data, the applicability of the numeral calculating method was verified.(2) The aerodynamic drag coefficients of train running in tunnel with different blocking ratios were obtained. By regression analysis of the data, the aerodynamic drag coefficients relationship with blocking ratios of tunnels was obtained, which shows that the aerodynamic drag coefficients have exponential function relationship with blocking ratios of tunnels, and the prediction formula was put forward.(3) Using the formula put forward in this paper, the aerodynamic drag coefficients of dual-head train running in tunnel were anticipated and the evacuated tube parameters design on the basis of equal aerodynamic drag was analyzed, which verified its reliability and practicability.(4) The research result can provide guidance for relevant analysis and design on aerodynamic drag coefficient of the train in tunnel.更多还原