Numerical simulation and analysis of ball valve threedimensional flow based on CFD

【Author】

S C Zhang,Y L Zhang and Z M Fang Industry Pump Institute,Zhejiang University of Technology,Hangzhou,Zhejiang

【Abstract】

The new rotor oil-gas mixture pump that added ball valves in its export is a kind of innovative products,which can better adapt to the oil and gas mixed condition.In order to explore the rule of flow field in the export ball valve of new rotor oil-gas mixture pump,established the 3 d model of ball valve flow field was established.Using the FLUENT software,combining the standard k ε turbulent model with multiphase flow technology and adopting the SIMPLE algorithm to simulate the 3 d gas-liquid two phase flow field in export ball valve of new rotor oil-gas mixture pump.In the different conditions that the volume of gas rate was 25%,50%,75%,through analyzing the velocity field,stress field and the distribution of the liquid and gas with the ball valve open height respectively at 3mm,5mm,7mm.Discussed how open height and different volume of gas rate to influence the field in export ball valve in the process of gas-liquid mixing was discussed.The simulation results showed that the greater the open height,the smaller the difference pressure of ball valve;the gap velocity decreasing with the open height increasing.The gas is mainly distributed in the vicinity of the valve ball in the process of gas-liquid mixing.The gas liquid ratio has a little effect on the gap velocity in the same open height.The results showed the flow field forms in the ball valve directly,to a certain degree,it had released the rules of gas-liquid flow in the valve and provided the theoretical guidance for design and optimization of the new rotor oil-gas mixture pump export ball valve.

【Keywords】

flow;Numerical simulation and analysis of ball valve threedimensional flow based on CFD;

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