Unsteady Motion in Pipe Flow of Gas-Solid Suspensions and Modeling

建议对管道内稠密气固悬浮液的非定常分层运动进行研究。这是一种能量高效的流态，在相对较低的速度下发生，但大于泥沙速度。将进行实验和理论研究相结合。将在两个51 mm和127 mm的测试环路系统中测量平均和波动参数，包括统计相关性。仪器的开发包括用于速度测量的电晕充电器探头。文中将建立分层水流中波动运动的基本方程。最后，对水平输送稠密气固悬浮液所获得的放大结果提出了一种方法。研究结果可用于较低运行速度的气固悬浮输送系统的设计和放大，对设备的能耗、颗粒磨损和磨损有积极的影响。

It is proposed to investigate the unsteady stratified motion of dense gas-solid suspensions in pipes. This is an energy efficient flow regime which occurs at relatively low velocities, but larger than the sediment velocity. A combination of experimental and theoretical studies will be undertaken. Measurements on mean and fluctuating parameters, including statistical correlations, will be performed in two test loop systems of 51 mm and 127 mm. The instrumentation development includes the corona charger probe for the velocity measurement. The basic equations for wave motion in stratified flow will be formulated. Finally, an approach to scale-up results obtained for horizontal conveying of dense gas-solid suspensions will be proposed. The results may be used for the design and scale up of gas- solid suspension transportation systems at relatively lower operation velocities, with positive effects on energy consumption, particle attrition and erosion of equipment.