The drag coefficient of the aft wetted area of vehicle also decreased with the ventilated cavitation number.
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。
To increase the head of bulb turbine, it is necessary to improve the runner blade design method and design high head bulb turbine with good energy and cavitation coefficient performance high.
欲提高贯流式水轮机的使用水头，应改进转轮叶片的设计方法，以设计出能量和气蚀性能良好的高水头贯流式水轮机。
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