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。
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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