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research-article

Effect of wake alignment on turbine blade loading distribution and power coefficient

[+] Author and Article Information
David H. Menéndez Arán

Laboratorio de Modelación Matemática, Facultad de Ingeniería, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
dmenendez@gmail.com

Ye Tian

Ocean Engineering Group, Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas, 78712
tianye@utexas.edu

Spyros A. Kinnas

Ocean Engineering Group, Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas, 78712
kinnas@mail.utexas.edu

1Corresponding author.

ASME doi:10.1115/1.4041669 History: Received June 24, 2015; Revised October 01, 2018

Abstract

This paper describes the use of a lifting line model in order to determine the optimum loading on a marine turbine's blades. The influence of the wake and its geometry is represented through the use of a full wake alignment model. The effects of viscous drag are included through a drag-to-lift ratio. The results obtained for different number of blades and rotational velocities are compared. Various types of constraints are imposed in the optimization method in order to avoid abrupt changes in the designed blade shape. Once the optimum loading has been determined, the blade geometry is generated for given chord, thickness and camber distributions. Finally, a vortex-lattice method is used to verify the power coefficient of the designed turbines.

Copyright (c) 2018 by ASME
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