地铁站台活塞风附壁射流起始段的实测和实验验证

为了从机理上探究站台活塞风分布规律,通过理论建模、现场实测和液体缩尺模型实验相结合的方法,提出并验证了站台活塞风起始段符合附壁射流理论模型。其中,对上海某地铁站台层的现场实测较好验证了站台活塞风起始段自由剪切区的理论模型,理论与实测数据的标准差在0.326和0.542之间;液体缩尺模型实验对站台活塞风起始段边界层区、势流核心区和自由剪切区理论模型进行了验证,三区吻合较好,标准差在0.071和0.746之间。上述研究证明了站台活塞风附壁射流理论起始段的正确性。

The Field Measurement and Experimental Verification of Subway Platform Piston Wind Attached Jet Theory

To study the platform piston wind distribution characteristics from the mechanism, it is put forward that the characteristics of platform piston wind conform to the attached jet theory, combining the theory modeling, field measurement and liquid scale model test. Based on the field measurement in a subway station in Shanghai, the field test data fit well with the theory calculation results in the initial segment of platform piston wind. The standard deviation between theory calculation and field measurement is between 0.326 and 0.542. The liquid scale model test is set up to verify the related mathematical model during the boundary layer district, potential flow core area and free shear zone in the initial segment. The model test results have good agreement with theory calculation with the standard deviation between 0.071 and 0.746. It is proved by above research works that the platform piston wind could be taken as the attached jet initial segment.