An experimental investigation of flow around a vehicle passing through a tornado
An experimental investigation of flow around a vehicle passing through a tornado
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DOI：
10.1051/epjconf/201611402116
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Masahiro Suzuki;Kouhei Obara;N. Okura
中科院分区：
文献类型：
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作者：
Masahiro Suzuki;Kouhei Obara;N. Okura
对通过龙卷风的车辆周围的流动进行了实验研究。开发了一种龙卷风模拟器，用于产生类似龙卷风的旋流。PIV研究证实，模拟器产生了在自然龙卷风中观察到的双单元涡旋。为了在龙卷风模拟器上运行1/40比例尺的列车模型车，研制了一台移动试验台。这辆车装有压力传感器，一个带有AD转换器的数据记录器，用来测量它在旋转流动中运行时的不稳定表面压力。根据压力数据估计了作用在飞行器上的气动力。结果表明，气动力的大小和方向随汽车在旋流中的位置而变化。旋涡中心附近的力的不对称性表明，飞行器本身可能会使流场变形。
Flow around a vehicle running through a tornado was investigated experimentally. A tornado simulator was developed to generate a tornado-like swirl flow. PIV study confirmed that the simulator generates two-celled vortices which are observed in the natural tornadoes. A moving test rig was developed to run a 1/40 scaled train-shaped model vehicle under the tornado simulator. The car contained pressure sensors, a data logger with an AD converter to measure unsteady surface pressures during its run through the swirling flow. Aerodynamic forces acting on the vehicle were estimated from the pressure data. The results show that the aerodynamic forces change its magnitude and direction depending on the position of the car in the swirling flow. The asymmetry of the forces about the vortex centre suggests the vehicle itself may deform the flow field.