双层集装箱列车过隧道空气压差阻力实验研究

Experimental research on pressure drag of the double container car passing through tunnel

双层集装箱列车通过隧道时，列车受到的空气阻力会显著增大。为了给列车牵引计算提供依据，在遂渝线上对双层集装箱列车过隧道时空气压差阻力进行了实车测量。测试结果表明：双层集装箱车辆进入隧道口时，空气压差阻力急剧上升，之后又迅速回落；测试车处于列车前部、机后第三节车时，平均空气压差阻力比明线空气阻力大80％-95％。

When a double container car enters into a tunnel, the aerodynamic forces severely change. In order to provide the basis of the traction calculation of the train, the experiment of the pressure drag when a double container car passes a tunnel was carried out in the Suining-Chongqing railway line. Results indicate that when the double container car enters into a tunnel, the pressure drag of the double container car quickly rises, and then rapidly falls. When the tested double container car locates in the third car behind the locomotive, the mean pressure drag of the double container passing the tunnel is much greater than that of running on open air, and the increase values are 80% - 95 %.