After taking into full consideration the factors such as condition of cavitation, drive force, available volume, and the difficulty of manufacturing, the shape of semi-ball at upstream is selected.
最后综合空化条件、驱动力、腔内有效体积和加工难度等因素，确定了上游半球形结构为设计形状。
Noise measurements obtained over 30 years ago with scale models and their full-size prototypes are shown to verify the scaling laws proposed for predicting cavitation noise levels and spectra.
卅多年前，用比例模型及其全尺寸原型所获得的噪声测量，证实了为预报空泡噪声级和频谱所提出的尺度定律。
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