Development and in-sea performance testing of a single point mooring supported contra-rotating tidal turbine

Joseph Andrew Clarke, Gary Connor, Andrew Grant, Cameron Johnstone

Research output: Contribution to conferencePaper

13 Citations (Scopus)


A 2nd generation, contra-rotating marine current turbine has been developed by the Energy Systems Research Unit at the University of Strathclyde. This
system can be tuned to extract energy over a wide range of water depths by “flying” a neutrally-buoyant device from a flexible, tensioned mooring. After
successful proof of concept turbine trials, the development programme has moved on to investigate the performance of a scaled prototype system
comprising of a dual rotor, contra-rotating turbine directly coupled to a submersible contra-rotating generator; and held on station via a gravity based
tensioned mooring system. The turbine/generator assembly was initially tested in a towing tank, before the entire system underwent sea trials initially at the
Kyles of Bute in the River Clyde Estuary before being deployed in the Sound of Islay of the West Coast of Scotland.
An investigation into turbine wake development (an area in which it is hoped that the contra-rotating turbine will have uniquely beneficial properties) has
recently begun. Small single-rotor model turbines have been deployed in a flume. Trends observed so far are in accordance with those observed by other
Original languageEnglish
Number of pages9
Publication statusPublished - 31 May 2009
Event28th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2009 - Hawaii, USA
Duration: 31 May 20095 Jun 2009


Conference28th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2009
CityHawaii, USA


  • in-sea performance testing
  • single point mooring
  • tidal turbine
  • offshore
  • arctic engineering

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