Numerical Simulation for Design Improvement in Diffuser of Multistage Centrifugal Pump

Rode, Bhushan R.; Khare, Ruchi

doi:10.1007/978-981-19-3371-4_14

Cited by 2 publications

(1 citation statement)

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“…Because of the longer shaft and higher reliability, multistage centrifugal pumps can have as many of stages, rendering them more compliant as compared to single-stage centrifugal pumps for hydraulic design. It is a kind of hydraulic machine that transforms rotational power into hydrodynamic power of the water, which raises the fluid to a higher head from a lower head [3]. This is attained by creating a negative head at the inlet and higher head at the outlet.…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement and Numerical Simulation of Inter-Stage of Multistage Centrifugal Pump by varying number of blades Using CFD

Singh,

2023

Preprint

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Numerous impellers are placed in line on a same shaft in a multistage centrifugal pump, comprises impeller, diffuser and return channel. A return channel is employed to direct the flow to the following impeller. This article uses numerical simulation to demonstrate and explain the performance evaluation of a two-stage centrifugal pump. To carry out numerical flow simulation for multistage, stage analysis is performed for each stage. Domain for simulation was created using Creo Parametric software and ANSYS Fluent 2022R1 was used for simulation. The flow simulation is carried out by using the k-ε turbulence model. The flow analysis of first stage is carried out for a different number of blades, viz. 5, 6, and 7, for different speeds varying from 1450 rpm to 1900 rpm. It was observed that 7 blade number and 1900 rpm are optimum in range as it gives the best performance results i.e. H=49.34m & η= 54.65%. The optimal solutions from the first-stage were used to analyse the second-stage. The first stage's flow differs markedly from the following stages. It was observed that losses in diffuser of 1st stage and 2nd stage are almost same but head losses in return passage of 1st stage and 2nd stage are having difference of 19.99%, 28.5%, and 23.59% for 5, 6, and 7 blades respectively. The findings show that the multistage simulation could more accurately mirror the actual flow than the two-stage simulation, but that it also had more demanding computer configuration requirements. Two-stage simulation is a good option for estimating pump performance because it strikes a better balance between computation time and numerical precision. The findings of this research present as a foundation and reference point for future enhancements to multistage centrifugal pump performance.

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Section: Introductionmentioning

confidence: 99%