Validation through internal flow physics of response surface methodology optimized mixed flow pump as turbine

Zhou, X and Yang, SS and Singh, P and Zhou, L (2024) Validation through internal flow physics of response surface methodology optimized mixed flow pump as turbine. In: Renewable Energy, 237 .

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Abstract

In order to determine the optimal working efficiency of mixed flow pumps as turbine (MF-PAT) under a design condition of 10m3kw, this study takes the number of blades, blade wrap angle, impeller outer diameter, and impeller inlet width as design variables. Based on the center combination design method, experimental scheme design is carried out, and the head, shaft power, and efficiency of the turbine are used as evaluation indicators. A response surface model is constructed for optimization analysis, and the optimal geometric parameter combination of the impeller for MF-PAT is determined. For MF-PAT with forward-curved blade impeller in this paper, the optimal parameter combination is recommended as blade number Z = 6, blade wrap angle α = 47°, impeller outer diameter D2 = 140 mm and impeller inlet width b2 = 34 mm. The results show that compared with the original scheme, its efficiency has increased by 7.8 . The established response surface model can reflect the relationship between evaluation indicators and design variables, and can be used for optimizing the geometric parameters of MF-PAT impellers. It can effectively enhance the blade's constraint ability on liquid flow, reduce hydraulic losses, and improve the performance of MF-PAT. Apply the ns-ds methodology for this and future mixed flow optimized pumps as turbines. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Renewable Energy
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Publisher.
Keywords:	Design of experiments; Hydraulic motors; Impellers; Turbine components; Turbine pumps, Design variables; Evaluation indicators; Impeller inlets; Impeller optimization; Mixed flow pump; Mixed-flow pump as turbine; Optimisations; Outer diameters; Pump as turbine; Response surfaces methods, Turbomachine blades, energy efficiency; numerical model; optimization; pump; response surface methodology; shaft; turbine
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited:	26 Nov 2024 15:25
Last Modified:	26 Nov 2024 15:25
URI:	http://eprints.iisc.ac.in/id/eprint/86939

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