基于FLUENT的变径防气抽油泵性能数值模拟及研究

Fluent-Based Numerical Simulation and Study of Performance of Variable Diameter Anti-gas Pump

对变径防气抽油泵原理进行了简单的介绍,利用FLUENT软件对气液两相流场进行仿真模拟,研究抽油泵上下冲程不同时刻泵筒内流场的流动状态,分析防气抽油泵泵筒的大直径区对整个流场的影响及其结构的优缺点。由仿真结果可知,上冲程时当防气抽油泵柱塞到达泵筒的大直径区后,油管中的液体会迅速流入泵筒内,泵筒内的压力会突然增大,同时破坏泵筒内气液两相流的段塞流流型;下冲程时含气率降低,冲程损失为零。

In this paper,the principle of the variable diameter anti-gas pump is briefly introduced,and the gas-liquid two-phase flow field is simulated by FLUENT software.The flow behavior of the flow field in the pump cylinder at different times of the up and down stroke of the pump is studied.The influence of the large diameter zone of the anti-gas pumping pump on the whole flow field and the advantages and disadvantages of its structure are analyzed.According to the simulation results,when the anti-gas pump plunger reaches the large diameter zone of the pump cylinder,the liquid in the oil pipe quickly flows into the pump cylinder,and the pressure inside the pump cylinder suddenly increases,and slug flow pattern of gas-liquid two-phase flow in the pump cylinder is destroyed.The downstroke gas content is reduced and the stroke loss is zero.