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Effect of Outlet Impeller Diameter on Performance Prediction of Centrifugal Pump Under Single-phase and Cavitation Flow Conditions by Ahmed Ramadhan Al-Obaidi; Ali Qubian is a Mathematics article available to read on EtoBox.

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## Abstract In this current study, the transient numerical calculations using CFD code are carried out under different outlet impeller diameters for the flow field within a centrifugal pump under single-phase and cavitation conditions. Both qualitative and quantitative analyses are carried out on all of these results in order to better understand the flow structure within a centrifugal pump. Also, the investigations using different outlet impeller diameters configurations relating to the static pressure, velocity magnitude, vapour volume fraction variations, as well as pressure fluctuations in both time and frequency domain at the impeller and volute of the pump are analysed. Velocity and static pressure variations of the pump under different outlet impeller diameters range (200, 210 and 220 mm) are investigated. Reliable model is developed and validated, at various pump operating conditions, to analyse the characteristics of pressure fluctuations in both time and frequency domain. Cavitation occurrence, under different outlet impeller diameters and flow rates, are detected and correlated, using a CFD model (volume fraction distributions). Based on the developed model’s findings, a

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Author

Ahmed Ramadhan Al-Obaidi; Ali Qubian

Publisher

Walter de Gruyter GmbH

Published

2022

Language

EN

Field

Mathematics (Physical Sciences)