ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Phase Doppler particle anemometer (PDPA) was used to measure the velocity field of liquid-solid two-phase flow under the optimum operating condition of a vortex pump. Radial velocity and axial velocity models were adopted to obtain 3-D velocity information of one point according to the characteristics of inner flow field in vortex pump. Velocity and corresponding fluctuating velocity of each phase in volute and impeller were gained by separating particle diameters method. Motion rules of two-phase in the pump were revealed by the analysis on distribution curves of circumferential velocity, axial velocity and radial velocity. It is proposed that velocity of solid phase is basically larger than that of liquid phase in impeller and so on. 