叶轮开孔对高效气液混合器性能的影响

Effect of Impeller Opening on the Performance of High Efficiency Gas-liquid Mixer

针对电潜泵用沉降式和旋转式油气分离器在高含气油井应用范围受限的问题,研究了适用于高含气条件的高效气液混合器。使用Fluent中的标准k-ε模型和气泡数平衡模型仿真模拟了高效气液混合器叶轮不同开孔孔径、开孔数量以及开孔位置的内部流场,以叶轮出口气体粒径的大小为依据得到了优化后的结构参数。仿真结果表明:在入口含气体积分数高于35%的高含气条件下,当叶轮开孔孔径为4.8 mm、开孔数量为2时,更有利于气泡的破碎;开孔的最佳位置位于高效气液混合器叶轮的轮盘低压区。研究结果对于我国高含气油井采油具有重要意义。

To address the application limitation of the sedimentation-and rotary- oil-gas separator for electric submersible pump in high gas content oil wells, a high efficiency gas-liquid mixer which can be applied under high gas content condition has been researched. By using the standard k-e model and the bubble number balance model in Fluent, the internal flow fields of the high efficiency gas-liquid mixer impeller have been simulated under differ -ent port radius, amounts and positions. The optimized structural parameters were attained based on the size of the gas at the impeller outlet. The simulation results show that, when the inlet gas content is higher than 35%, it is preferable for bubble broken under the port radius of 4. 8 mm , with the two ports located in the low pressure zone of the impeller, which results in a better gas treatment.