A novel twin-rotor radial-inflow air turbine for oscillating-water-column wave energy converters

被引：36

作者：

Falcao, Antonio F. O. ^{[1
]}

Gato, Luis M. C. ^{[1
]}

Henriques, Joao C. C. ^{[1
]}

Borges, Joao E. ^{[1
]}

Pereiras, Bruno ^{[2
]}

Castro, Francisco ^{[3
]}

机构：

[1] Univ Lisbon, Inst Super Tecn, IDMEC, LAETA, P-1049001 Lisbon, Portugal

[2] Univ Oviedo, Dept Energy, Gijon 33271, Spain

[3] Univ Valladolid, Dept Energet & Fluid Mech Engn, E-47011 Valladolid, Spain

来源：

ENERGY | 2015年 / 93卷

基金：

欧盟地平线“2020”;

关键词：

Air turbine; Wave energy; Oscillating water column; Numerical simulation; Aerodynamics; 3-DIMENSIONAL INVERSE METHOD; TURBOMACHINERY; TOPOLOGY;

D O I：

10.1016/j.energy.2015.10.046

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A novel air turbine for bidirectional flows in oscillating-water-column wave energy converters is presented and its performance is analyzed. The turbine is based on a pair of conventional radial-inflow rotors mounted on the same shaft, complemented by the corresponding guide vane rows, by a curved-duct manifold arranged circumferentially in a period manner and by a two-position cylindrical valve. Numerical values of the performance of the whole machine were obtained from published experimental data of the flow through a conventional radial-inflow gas turbine, together with CFD (computational fluid dynamics) results for aerodynamic losses in the curved duct manifold. Four different geometries, combined with five different sizes, of the curved-duct manifold were numerically simulated. Windage losses, that occur at the inactive rotor and are inherent to the machine conception, were found to be a major loss. A peak value of about 86% was obtained for the overall efficiency of the machine. Comparisons are presented between the new turbine and the biradial turbine (sliding guide-vanes version), the latter being possibly the most efficient self-rectifying turbine model-tested so far. The new turbine was found to be more efficient, both in peak instantaneous efficiency and in maximum average efficiency in random waves, by a margin of about 8%. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：2116 / 2125

页数：10

共 22 条

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