The criterion of diagnosis to inception cavitation based on different scales energy characteristic of the signal was brought up.

提出以信号各尺度能量特征值作为初生汽蚀诊断识别的判据。

Experiment and theory analysis shows that the inception cavitation and developed cavitation can be simulated by hydraulic tunnel device in laboratory.

试验和理论分析表明，水流的初生空化和空蚀可以利用常压水洞来模拟。

The inception cavitation does n'f only related the liquid vapouration pressure and its character, but also the pressure grad and velocity distribution.

水流的初生空化噪声频率不仅与汽化压力和流体的特性有关，而且还与流体的环境压力分布和速度分布有关，与空化类型关系更为密切。