【摘要】 将直线电机置于井下,直接驱动柱塞泵举升原油,有利于提高系统效率和节能。根据直线电机抽油泵结构,结合柱塞和阀球运动模型,运用动网格技术和自编程UDF模块对Fluent进行二次开发,实现了柱塞和阀球运动与流场的耦合求解。可以确定泵筒内任意计算时刻流场状态,揭示了柱塞往复运动过程中泵筒内部流场演化、阀球运动和流场特性。计算结果与实验结果吻合较好,为研究新型抽油泵提供了参考和依据。更多还原

【Abstract】 The linear motor combined with the oil pump is deployed in downhole for lifting.This new method can increase the system efficiency and save energy greatly compared with beam pumping technology.Numerical stimulation for the flow field is carried out according to the structure of linear motor pump system.The dynamic mesh technology and UDF model of the Fluent is introduced to simulate the motion of valve and piston.The distributions of velocity are obtained at different work times.The evolution progress,flow field configuration and hydrodynamic characteristics of the complex unsteady flow can be reflected in the barrel during the piston motion.As a result,the study with the method of the computational fluid dynamics and the technology of dynamic mesh during researching new oil pump can be regarded as reference and evidence.更多还原