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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1559

Title: CFD STUDY ON THE PERFORMANCE OF REGENERATIVE FLOW PUMP (RFP) WITH AERODYNAMIC BLADE GEOMETRY
Authors: YONAS, TESHOME
Advisors: Dr.-Ing. Edessa Dribsa
Copyright: 2007
Date Added: 22-Oct-2008
Publisher: Addis Ababa University
Abstract: Owing to their low specific speed, the regenerative flow pumps (RFP) are capable of developing high heads at low flow rates. The fluid in a RFP moves helically in the casing and reenters the impeller many times in its peripheral path from inlet to discharge. These machines have found applications in many industrial areas including automotive and aerospace fuel pumping, booster systems, water supply, agricultural industries, shipping and mining, chemical, and food processing systems. However, RFP has a disadvantage in its lower efficiency compared with other conventional turbomachines. With the aim of improving the performance of RFP, in this work, attempt is made to utilize aerodynamic blades instead of the common design of radial and non-radial blades. The methodology included a series of simulations on numerical models of regenerative flow pumps using FLUENT - a commercial CFD software package. From results of the CFD analysis on RFP: the downward sloping, nearly linear head - capacity curve of regenerative pumps has been illustrated; their low specific speed operational merit has been demonstrated; the typical cork screw flow pattern inside these machines has been well displayed; their multi-staging effect as the pressure builds up from inlet to discharge port is best explained; significant improvement of performance has been obtained in using aerodynamic blades with semi-elliptic profile.
Description: A THESIS SUMMITTED TO THE SCHOOL OF GRADUATE STUDIES ADDIS ABABA UNIVERSITY IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR DEGREE OF MASTERS OF SCIENCE IN MECHANICAL ENGINEERING (WITH SPECIALIZATION IN THERMAL ENGINEERING)
URI: http://hdl.handle.net/123456789/1559
Appears in:Thesis - Mechanical Engineering

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