Computational Study on the Influence of Number of Threads on the Perfor-mance of Single Screw Pump at High Angular Velocities

作     者：Jaison Philip Abhilash Suryan T.V Sanand P Unnikrishnan Nair S. Sivakumar 

作者机构：Department of Mechanical Engineering College of Engineering Trivandrum Kerala India 695016 Turbo Pump Division LPSC Valiamala Trivandrum Kerala. Department of Mechanical Engineering Rajadhani Institute Engineering & Technology Trivandrum Kerala India 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2017年第26卷第1期

页      面：54-59页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：Screw pump, Turbulent flow, Angular velocity 

摘      要：Fluid flow in a screw pump which rotates at very high angular velocity is numerically analyzed. In the present study, fluid flow in screw pumps under high Reynolds number, of the order of 105, is considered. Screw pump has two major elements, a plain shroud which is a stationary element and a rotating hub with helical grooves contained within the shroud. In this paper, three variants of hubs with different number of thread starts numbering six, eight and twelve in combination with a plain shroud is studied. Each of the three possible combinations are analyzed on the basis of pressure rise developed, efficiency and shaft power. It was seen that pressure rise, efficiency and shaft power increases as the number of threads increases in the range of mass flow rates studied.