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Efficiency and Optimal Loading of Contra-Rotating Marine Turbines

[+] Author Affiliations
Wei Xu

MARIN USA, Houston, TX

Spyros A. Kinnas

The University of Texas at Austin, Austin, TX

Paper No. OMAE2011-50008, pp. 787-795; 9 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5: Ocean Space Utilization; Ocean Renewable Energy
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4437-3
  • Copyright © 2011 by ASME


In this paper, an optimization method is developed for determining the loading on each component, which leads to the maximum efficiency (i.e. maximum output power) of a contra-rotating turbine when subject to uniform inflow. The lifting line model is adopted and both the self-induced velocities and the interaction induced velocities between the front and the back components are included. The optimum ratio of rotational velocities for reducing the torque on support structures and the performance effects of the gap distance between two components are investigated. The optimum distance for two in-line turbines in a turbine farm is also analyzed.

Copyright © 2011 by ASME
Topics: Turbines



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