If you kick the ball hard enough for the airflow over the surface to become turbulent, then the drag force remains small and the ball will really fly.
如果你踢球的力量足够大，使得球表面的气流形成湍流，则阻力会很小，你很可能踢成高射炮。
However, when the airflow is turbulent, the boundary layer sticks to the ball for longer.
然而，当气流为湍流时，边界层维持时间较长。
According to the law of conservation in the state of turbulent flow, the differential equation describing the airflow temperature distribution in drifting tunnel is derived.
根据紊流状态下的守恒原理，导出了描述掘进巷道风流紊流流动和温度分布的微分方程。
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