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Performance Improvement of a Drag Hydrokinetic Turbine

Impeller Optimization in Crossflow Hydraulic Turbines

Department of Engineering, University of Palermo, 90128 Palermo, Italy
National School of Engineers of Sfax, University of Sfax, Sfax 3038, Tunisia
Author to whom correspondence should be addressed.
Academic Editor: Inmaculada Pulido-Calvo
Water 2021, 13(3), 313;
Received: 24 November 2020 / Revised: 15 January 2021 / Accepted: 25 January 2021 / Published: 27 January 2021
(This article belongs to the Special Issue Hydraulic Dynamic Calculation and Simulation)
Crossflow turbines represent a valuable choice for energy recovery in aqueducts, due to their constructive simplicity and good efficiency under variable head jump conditions. Several experimental and numerical studies concerning the optimal design of crossflow hydraulic turbines have already been proposed, but all of them assume that structural safety is fully compatible with the sought after geometry. We show first, with reference to a specific study case, that the geometry of the most efficient impeller would lead shortly, using blades with a traditional circular profile made with standard material, to their mechanical failure. A methodology for fully coupled fluid dynamic and mechanical optimization of the blade cross-section is then proposed. The methodology assumes a linear variation of the curvature of the blade external surface, along with an iterative use of two-dimensional (2D) computational fluid dynamic (CFD) and 3D structural finite element method (FEM) simulations. The proposed methodology was applied to the design of a power recovery system (PRS) turbine already installed in an operating water transport network and was finally validated with a fully 3D CFD simulation coupled with a 3D FEM structural analysis of the entire impeller. View Full-Text
Keywords: micro-hydropower; energy recovery; energy harvesting; banki turbine; water distribution network; pressure control micro-hydropower; energy recovery; energy harvesting; banki turbine; water distribution network; pressure control
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MDPI and ACS Style

Sinagra, M.; Picone, C.; Aricò, C.; Pantano, A.; Tucciarelli, T.; Hannachi, M.; Driss, Z. Impeller Optimization in Crossflow Hydraulic Turbines. Water 2021, 13, 313.

AMA Style

Sinagra M, Picone C, Aricò C, Pantano A, Tucciarelli T, Hannachi M, Driss Z. Impeller Optimization in Crossflow Hydraulic Turbines. Water. 2021; 13(3):313.

Chicago/Turabian Style

Sinagra, Marco, Calogero Picone, Costanza Aricò, Antonio Pantano, Tullio Tucciarelli, Marwa Hannachi, and Zied Driss. 2021. "Impeller Optimization in Crossflow Hydraulic Turbines" Water 13, no. 3: 313.

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