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

To decrease the flow unsteadiness in pump hydraulic design procedure as much as possible, the inner flow unsteadiness intensity and distribution should be understood. For analyzing the unsteady flow phenomenon in low-specific speed centrifugal pump, CFD software was employed to simulate the 3-D unsteady fluid flow in the pump, and meanwhile the time-averaged unsteadiness intensity coefficients were defined based on velocity triangle in order to directly depict the flow unsteadiness. By analyzing the distributions of the intensity coefficients in the low-specific speed pump, the results show that stronger flow unsteadiness can be found near blade suction side, and in the wake flow area the flow varies with time strongly. In addition, strong flow unsteadiness is also significant in the discharge tube and the area near impeller outlet of the volute.