PIV技术在近水平油水两相流研究中的应用

The application of PIV technique for the investigation of oil-water two phase flow

自行研制了用于油水两相流研究的PIV(粒子图像速度仪)实验系统。该实验平台主要用于研究近水平油井测量仪器内的油水两相管流。分别对水平油水两相流中的分层流和分散流的速度场进行了测量。油水两相流流动速度分布与单相流有着明显不同的特征。油水分层流情况下油相和水相之间存在比较显著的速度滑移。而在水包油分散流的情况下,由于油滴平均直径在径向上的不对称分布,以及小油滴具有更好的跟随性等原因,油滴的轴向速度也呈现不对称性。PIV技术在油水两相流研究中展示出良好的应用潜力。

A test system was developed for the Particle Image Velocimetry （PIV） measure- ment in oil-water two phase flow. The device was applied to measure the velocity field of both stratified flow and dispersed flow in near-horizontal pipe whose diameter was 20mm. The velocity distributions of the pipe at the conditions of different fluxes and different angles were obtained, which demonstrated that the velocity profiles of oil-water two phase flow were quite different from that of single phase flow. There was remarkable velocity slip between oil and water under stratified flow condition. Under dispersed flow condition, because different diameter oil droplets had different lag velocities, the asymmetry of average oil droplet velocity profile was observed. It was also found that PIV technology had an extensive application prospect for the research of oil- water flow.