Numerical Studies on Effects of Blade Number Variations on Performance of Centrifugal Pumps at 4000 RPM

Abstract

In this study, the performance of impellers with the same outlet diameter having different blade numbers for centrifugal pumps is thoroughly evaluated The impeller outlet diameter, the blade angle and the blade uumbers are the most critical parameters which affect the performance of centrifugal pumps.. The model pump has a design rotation speed of 4000 rpm and an impeller with 4

3-D Numerical Study of the Effect of Impeller Blades Slot on the Centrifugal Pump Performance Using CFD

“…Finally, the effect of the slot height on the impeller head is examined, cases (11)(12)(13)(14)(15). Figure (18) shows that with increasing slot height the head increases up to certain value then it decreases.…”

“…Some authors made optimization on the blade exit angle and they found that with increasing the blade exit angle the head increases but the efficiency decreases [8][9][10][11][12]. Some other authors conducted optimization on the number of blades [13][14][15]. They concluded that when increasing the number of blades, both head and efficiency increase until a certain number of blades at which the efficiency decreases.…”

Design and CFD Analysis of Liquid Ring Vacuum Pump

“…That at inlet of WRVP get generated vacuum pressure is 6.134 e 4 Pa which means that 460.087 mm of Hg in terms of vacuum. …”

“…A vacuum pump is a device for creating, improving and/or maintaining a vacuum [1,2]Mechanical vacuum pumps works by the process of positive gas displacement, that is, during operation the pump periodically creates increasing and decreasing volumes to remove gases from the system, and exhaust them to the atmosphere [5]. Two basically distinct categories may be considered gas transfer pumps and entrapment or capture pumps [4]. Different types of vacuum pumps are Liquid ring (water ring), rotary vane, rotary piston, dry vacuum pumps, vacuum boosters etc [3].…”

Parametric Study and Design Optimization ....

“…E.C.Bacharoudis et al [2] have investigated the effect of various geometrical parameters of centrifugal pump to improve the performance they found that performance curve becomes flatter and smoother for the entire range of the flow rates as outlet blade angle increases. A.Wilk [3] found that large delivery head can be obtained by high rotational speed L. Houlin et al [4] and S.Chakraborty et al [5][6] have studied effect of blade number on the performance of centrifugal pump and found that head and efficiency increases with increase in the blade number keeping casing and other geometric parameters constant. S. Weidong et al [7] have studied effect of impeller outlet width on performance of deep well centrifugal pump and found that outlet width is conducive to get a better performance.…”