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利用1/16缩比的公共汽车模型及两种类型的导流装置,在一带有可移动地面和边界层吸收装置的Eiffel型风洞中进行了在车辆后端面的上下边和侧边分别安装导流装置时车辆后部尾流区的压强恢复及气动阻力降低的实验。应用边界层分离理论比较详细地分析了安装导流装置的车辆后部尾流区的流动机理,综合分析评价了车辆表面与导流装置间的缝隙在空气引流及车辆气动阻力的降低中的作用,为新型车辆的设计和改造提供有利依据。
In the Eiffel-type wind tunnel with movable floor and boundary layer absorber, a bus model of 1/16 reduction ratio and two types of diversion devices were used to install on the upper and lower sides and the sides of the rear end of the vehicle respectively Experimental study on the pressure recovery and aerodynamic drag reduction in the wake area of the rear of the vehicle during the deflector. Applying the theory of boundary layer separation, the flow mechanism of the rear wake area of the vehicle with the guide device is analyzed in detail. The effect of the gap between the vehicle surface and the guide device on the air drainage and the reduction of the aerodynamic drag of the vehicle is analyzed and evaluated , For the new vehicle design and transformation provide a favorable basis.