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Abstract: Aiming
at the high vaporous pressure and easy cavitation occurrence of water, the cavitation flow in orifices using water as working media is analysed
theoreticalIy by applying cavitation model. At the same time, the
cavitation flow in the orifices is experimented with visualization
method. Based on these, the growing processes of cavitation in the
orifices are introduced and the influences of diameter and the ratio of
length and diameter of orifices are analysed. The research results show
that cavitation occurs firstly at the inlet of orifice and is gradually
pushed to the outlet with the increasing of pressure drop across the
orifice. Cavitation is more likely to happen in the orifice with larger
ratio of length and diameter when the diameter is the same and with
larger diameter when the ratio of length and diameter is the same.
Key words: Water hydraulic transmission
Orifice Cavitation flow
Cavitation model
CLC No: TH137
国家自然科学基金资助项目(50405031). Received 20060308, received in revised form 20060903
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