随通气空化数的减小，超空泡航行体尾部沾湿区域阻力系数也逐渐减小。
The drag coefficient of the aft wetted area of vehicle also decreased with the ventilated cavitation number.
计算结果表明：在通气空泡的形成过程中，通气方向角存在着一个临界值，使得空泡形态由片状空泡过渡到超空泡；
The results of simulation indicate that there is a critical value for ventilation direction to transfer sheet cavity into supercavity.
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