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。

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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。

youdao