渥奇段的空化为体型分离型，初生空化数约为0．2左右。
The paraboloid cavitation pattern is an isolated type; and the initial cavitation number is 0. 2 or so.
理论分析表明，原因是渥奇面太“瘦”，简单地加“肥”渥奇面，工程量过大，不满足工程需要。
Theoretical analysis demonstrates that the cause of this flow phenomenon is too thin Ogee surface.
渥奇面上设掺气挑坎，流速大时可能发生散水现象，强烈散水会对泄洪建筑物产生不利影响，应尽可能避免。
When a bucket aerator is laid on an arch structure, serious spray may occur with high velocity, intense spray is negative to the discharging structure, which should be avoided.
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