CA9: Analysis of a stall-resistant aerofoil in view of wave power conversion

A. Thakker; P. Frawley; E. S. Bajeet

CA9: Analysis of a stall-resistant aerofoil in view of wave power conversion

A. Thakker
, P. Frawley
, E. S. Bajeet

University of Limerick

Research output: Contribution to conference › Paper › peer-review

Abstract

Wave energy power take-off typically consists of a Wells turbine. This self-rectifying axial air turbine has shown to be constrained by severe stall at high angle of attack or in the supercritical range. This paper presents an experimental and numerical investigation of the CA9 aerofoil, which was optimised for stall resistance. Analysis was done for a 0.6m rotor and tests were carried out at Re = 5 × 10⁵ and Ma = 0.2. Results showed that the CA9 profile was more resistant to stall and had a higher average efficiency than NACA0015; thus being more suitable for wave energy conversion systems. Numerical data was benchmarked using experimental ones and provided an insight in the separation mechanism of the flow. Guide vanes improved both starting and running characteristics of rotor.

Original language	English
Pages	614-619
Number of pages	6
Publication status	Published - 2001
Event	11th (2001) International Offshore and Polar Engineering Conference - Stavanger, Norway Duration: 17 Jun 2001 → 22 Jun 2001

Conference

Conference	11th (2001) International Offshore and Polar Engineering Conference
Country/Territory	Norway
City	Stavanger
Period	17/06/01 → 22/06/01

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CA9
Self-rectifying turbine
Stall
Wells Turbine

Cite this

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title = "CA9: Analysis of a stall-resistant aerofoil in view of wave power conversion",

abstract = "Wave energy power take-off typically consists of a Wells turbine. This self-rectifying axial air turbine has shown to be constrained by severe stall at high angle of attack or in the supercritical range. This paper presents an experimental and numerical investigation of the CA9 aerofoil, which was optimised for stall resistance. Analysis was done for a 0.6m rotor and tests were carried out at Re = 5 × 105 and Ma = 0.2. Results showed that the CA9 profile was more resistant to stall and had a higher average efficiency than NACA0015; thus being more suitable for wave energy conversion systems. Numerical data was benchmarked using experimental ones and provided an insight in the separation mechanism of the flow. Guide vanes improved both starting and running characteristics of rotor.",

keywords = "CA9, Self-rectifying turbine, Stall, Wells Turbine",

author = "A. Thakker and P. Frawley and Bajeet, \{E. S.\}",

year = "2001",

language = "English",

pages = "614--619",

note = "11th (2001) International Offshore and Polar Engineering Conference ; Conference date: 17-06-2001 Through 22-06-2001",

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TY - CONF

T1 - CA9

T2 - 11th (2001) International Offshore and Polar Engineering Conference

AU - Thakker, A.

AU - Frawley, P.

AU - Bajeet, E. S.

PY - 2001

Y1 - 2001

N2 - Wave energy power take-off typically consists of a Wells turbine. This self-rectifying axial air turbine has shown to be constrained by severe stall at high angle of attack or in the supercritical range. This paper presents an experimental and numerical investigation of the CA9 aerofoil, which was optimised for stall resistance. Analysis was done for a 0.6m rotor and tests were carried out at Re = 5 × 105 and Ma = 0.2. Results showed that the CA9 profile was more resistant to stall and had a higher average efficiency than NACA0015; thus being more suitable for wave energy conversion systems. Numerical data was benchmarked using experimental ones and provided an insight in the separation mechanism of the flow. Guide vanes improved both starting and running characteristics of rotor.

AB - Wave energy power take-off typically consists of a Wells turbine. This self-rectifying axial air turbine has shown to be constrained by severe stall at high angle of attack or in the supercritical range. This paper presents an experimental and numerical investigation of the CA9 aerofoil, which was optimised for stall resistance. Analysis was done for a 0.6m rotor and tests were carried out at Re = 5 × 105 and Ma = 0.2. Results showed that the CA9 profile was more resistant to stall and had a higher average efficiency than NACA0015; thus being more suitable for wave energy conversion systems. Numerical data was benchmarked using experimental ones and provided an insight in the separation mechanism of the flow. Guide vanes improved both starting and running characteristics of rotor.

KW - CA9

KW - Self-rectifying turbine

KW - Stall

KW - Wells Turbine

UR - https://www.scopus.com/pages/publications/0034867088

M3 - Paper

AN - SCOPUS:0034867088

SP - 614

EP - 619

Y2 - 17 June 2001 through 22 June 2001

ER -

CA9: Analysis of a stall-resistant aerofoil in view of wave power conversion

Abstract

Conference

UN SDGs

Keywords

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