Development of a contra-rotating tidal current turbine and analysis of performance

J. A. Clarke, G. Connor, A. D. Grant, C. M. Johnstone, D. Mackenzie

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds. Modified blade element modelling theory has been used to design and predict the characteristics of such a turbine, and a model turbine and test rig have been constructed. Tests in a towing tank demonstrated the feasibility of the concept. Power coefficients were high for such a small model and in excellent agreement with predictions, confirming the accuracy of the computational modelling procedures. Highfrequency blade loading data were obtained in the course of the experiments. These show the anticipated dynamic components for a contra-rotating machine. Flow visualization of the wake verified the lack of swirl behind the turbine. A larger machine is presently under construction for sea trials.
LanguageEnglish
Title of host publicationProceedings of the 7th european wave and tidal energy conference
Place of PublicationSouthampton
Number of pages8
Publication statusPublished - 2007

Fingerprint

Turbines
Ship model tanks
Ocean currents
Flow visualization
Turbomachine blades
Torque
Rotors
Experiments

Keywords

  • wave energy
  • tidal energy
  • renewable energy
  • turbines
  • design engineering
  • development
  • contra-rotating
  • current turbine
  • analysis
  • performance

Cite this

Clarke, J. A., Connor, G., Grant, A. D., Johnstone, C. M., & Mackenzie, D. (2007). Development of a contra-rotating tidal current turbine and analysis of performance. In Proceedings of the 7th european wave and tidal energy conference Southampton.
Clarke, J. A. ; Connor, G. ; Grant, A. D. ; Johnstone, C. M. ; Mackenzie, D. / Development of a contra-rotating tidal current turbine and analysis of performance. Proceedings of the 7th european wave and tidal energy conference. Southampton, 2007.
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abstract = "A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds. Modified blade element modelling theory has been used to design and predict the characteristics of such a turbine, and a model turbine and test rig have been constructed. Tests in a towing tank demonstrated the feasibility of the concept. Power coefficients were high for such a small model and in excellent agreement with predictions, confirming the accuracy of the computational modelling procedures. Highfrequency blade loading data were obtained in the course of the experiments. These show the anticipated dynamic components for a contra-rotating machine. Flow visualization of the wake verified the lack of swirl behind the turbine. A larger machine is presently under construction for sea trials.",
keywords = "wave energy, tidal energy, renewable energy, turbines, design engineering, development, contra-rotating, current turbine, analysis, performance",
author = "Clarke, {J. A.} and G. Connor and Grant, {A. D.} and Johnstone, {C. M.} and D. Mackenzie",
year = "2007",
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Clarke, JA, Connor, G, Grant, AD, Johnstone, CM & Mackenzie, D 2007, Development of a contra-rotating tidal current turbine and analysis of performance. in Proceedings of the 7th european wave and tidal energy conference. Southampton.

Development of a contra-rotating tidal current turbine and analysis of performance. / Clarke, J. A.; Connor, G.; Grant, A. D.; Johnstone, C. M.; Mackenzie, D.

Proceedings of the 7th european wave and tidal energy conference. Southampton, 2007.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Development of a contra-rotating tidal current turbine and analysis of performance

AU - Clarke, J. A.

AU - Connor, G.

AU - Grant, A. D.

AU - Johnstone, C. M.

AU - Mackenzie, D.

PY - 2007

Y1 - 2007

N2 - A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds. Modified blade element modelling theory has been used to design and predict the characteristics of such a turbine, and a model turbine and test rig have been constructed. Tests in a towing tank demonstrated the feasibility of the concept. Power coefficients were high for such a small model and in excellent agreement with predictions, confirming the accuracy of the computational modelling procedures. Highfrequency blade loading data were obtained in the course of the experiments. These show the anticipated dynamic components for a contra-rotating machine. Flow visualization of the wake verified the lack of swirl behind the turbine. A larger machine is presently under construction for sea trials.

AB - A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds. Modified blade element modelling theory has been used to design and predict the characteristics of such a turbine, and a model turbine and test rig have been constructed. Tests in a towing tank demonstrated the feasibility of the concept. Power coefficients were high for such a small model and in excellent agreement with predictions, confirming the accuracy of the computational modelling procedures. Highfrequency blade loading data were obtained in the course of the experiments. These show the anticipated dynamic components for a contra-rotating machine. Flow visualization of the wake verified the lack of swirl behind the turbine. A larger machine is presently under construction for sea trials.

KW - wave energy

KW - tidal energy

KW - renewable energy

KW - turbines

KW - design engineering

KW - development

KW - contra-rotating

KW - current turbine

KW - analysis

KW - performance

M3 - Chapter

SN - 9789899507937

BT - Proceedings of the 7th european wave and tidal energy conference

CY - Southampton

ER -

Clarke JA, Connor G, Grant AD, Johnstone CM, Mackenzie D. Development of a contra-rotating tidal current turbine and analysis of performance. In Proceedings of the 7th european wave and tidal energy conference. Southampton. 2007