Abstract:

The solid-liquid two-phase flow equations of the draining-sand jet pump have been established according to the RNG k-ε two-equation turbulence model. On this basis, the numerical analysis models of break and gradual changed were established .Then, the characteristics of efficiency and solid phase ratio and velocity field distribution and pressure field distribution were analyzed by the computer software of computational fluid dynamics. The numerical analysis results show that, to reduce the contrary velocity vector of the solid-liquid two-phase flow is the effective technique for improving the comprehensive properties of the draining-sand jet pump by using the gradual changed structure of the diffuser outlet.

Key words: oil wells, jet pumps, two phase flow, diffusers, CFD