若流线型物体表面的摩擦阻力系数仅为相对粗糙度的函数，则形状阻力系数与雷诺数无关。
Since if the frictional resistance coefficient is a function of relative roughness, then the form resistance coefficient is independent of the Reynolds number.
通过表面积分的方法得到各种列车车头的阻力，进而计算得到了车头模型的阻力系数。
Drag of the train head is obtained by the method of surface integral and drag coefficient can be computed at the same time.
运用摄动方法，给出了速度势的四阶近似，然后得到了圆柱表面的无量纲的压力系数和阻力系数。
Using the perturbation method we have got the fourth order of approximation of the velocity potential to the problem.
运用摄动方法，给出了速度势的四阶近似，然后得到了圆柱表面的无量纲的压力系数和阻力系数。
Using the perturbation method we have got the fourth order of approximation of the velocity potential to the problem.
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