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Abstract: A test rig for testing the flow characteristics of ball
orifice is introduced. Experiments on the flow characteristics of ball
orifices with different structure parameters are carried out. The
experiment results show that when ball seat’s half cone angle is 45°,
chamfer length less than Rcosa/4, the ball orifice has relatively stable
flow coefficient, about 0.9～1.0, and has good ability to inhibit flow
saturation under all test openings and Reynolds numbers. It is also
obtained from the experiment results that the chamfer angle of the valve
seat has great influence to the ball orifice’s flow-pressure
differential characteristic,
however the chamfer length influences less.
Key words: Water hydraulics Ball valve Flow characteristics Flow
saturation
CLC No: TH137
国家自然科学基金资助项目(59975031). Received 20030520, received in revised form
20040215
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