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

In order to study how the leakage flow affect the vibration characteristics of rotors in centrifugal pump and calculate the rotordynamic forces from the unsymmetrical pressures acting on the shroud, the front cavity leakage flow was modeled, and an analysis of numerical simulation of rotordynamic forces arising from the front cavity leakage flow was presented in a centrifugal pump. Firstly, numerical simulation of whole flow field was conducted on a centrifugal pump. Secondly, the simulated results was used as the initial conditions of numerical simulation of the front cavity, and the velocity and pressure distributions of the interior flow field of the front cavity passage were obtained and analyzed. Both normal and tangential rotordynamic forces for various whirl frequency ratios were calculated. Last, rotordynamic forces and all six rotordynamic coefficients were calculated via a second order curve fit, and the results showed that numerical simulation could accurately calculate the rotordynamic forces arising from the front cavity leakage flow.