Computational study on the influence of number of threads on the performance of single screw pump at high angular velocities

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• 作者：Jaison Philip ; Abhilash Suryan ; T.V. Sanand…
• 关键词：Screw pump ; Turbulent flow ; Angular velocity
• 刊名：Journal of Thermal Science
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：26
• 期：1
• 页码：54-59
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Classical and Continuum Physics; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer;
• 出版者：Science Press
• ISSN：1993-033X
• 卷排序：26

文摘

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.