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Paper Title : Modeling and Prototyping of a Centrifugal Pump Impeller For Better Efficiency

ISSN : 2395-1303
Year of Publication : 2021
10.29126/23951303/IJET-V7I4P22

Authors: Harsh Vardahan Singh Tomar,M.L. jain

         


Abstract
- Because of the expanding engineering needs, transient performance of fluid equipment during transient operating periods, such as startup and stopping, has received increased attention recently. The transient behavior of a prototype centrifugal pump with an open impeller is investigated experimentally in this research during a quick startup period. Experiments at various discharge valve openings are used to record fluctuations in rotational speed, flow rate, head, and shaft power during the rapid startup period. The non-dimensional flow rate and head are also utilized to investigate transitory behavior. The findings reveal that the rising characteristic of rotational speed is mostly influenced by the startup characteristics of the driving motor, rather than working points. In comparison to the quick increase in rotating speed, the flow rate increases slowly at first. Furthermore, the flow rate lags behind the rotating speed in reaching a final stable value, and the lag becomes more pronounced as the discharge valve opening is increased. The shaft power impact phenomena is common during the startup process. The nondimensional study reveals that the non-dimensional head is very high at the start of starting, quickly drops to the minimum, and then gradually rises to the final stable value, but the nondimensional flow rate always exhibits a rise trend throughout the startup time. In conclusion, the quasi-steady analysis is unable to appropriately estimate the transient flow during the startup period, as evidenced by the non-dimensional results.

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Keywords
——Centrifugal pump, experimental study open impeller, transient behavior, startup periods.