以实车的隧道空气动力学试验资料为参照进行对比计算，计算活塞风速度与实测结果较好符合。
The calculated piston wind velocity accords with the measured result on site through making a comparison with tunnel aerodynamic test data of real vehicles.
此外，作物残茬、秸秆和牧草等粗糙元的高度、密度及直立性均对下垫面的空气动力学粗糙度、摩阻速度及风速脉动有一定影响。
In addition, the height, density and perpendicularity of remnant stubble, straws and grass had influence on aerodynamic roughness and wind velocity fluctuation on different underlying surfaces.
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