1 / 43

Hydrodynamics of tidal stream energy devices with two rows of blades

Hydrodynamics of tidal stream energy devices with two rows of blades. Peter Johnson PhD student, UCL Mechanical engineering, and Lecturer, Nazarbayev University School of Engineering with Adam Wojcik and Kevin Drake, UCL Mechanical Engineering.  ?.

eadoin
Download Presentation

Hydrodynamics of tidal stream energy devices with two rows of blades

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hydrodynamics of tidal stream energy devices with two rows of blades Peter Johnson PhD student, UCL Mechanical engineering, and Lecturer, Nazarbayev University School of Engineering with Adam Wojcik and Kevin Drake, UCL Mechanical Engineering  ?

  2. Hydrodynamics of tidal stream energy devices with two rows of blades Peter Johnson PhD student, UCL Mechanical engineering, and Lecturer, Nazarbayev University School of Engineering with Adam Wojcik and Kevin Drake, UCL Mechanical Engineering

  3. Support Column water speed Guy cable cable Sea Bed Guy cable blade speed blade relative speed blade cable cable blade Guy cable blade lift Generator cable drag Guy cable

  4. θ Ft Fn Ft Fn

  5. 0.5 m chain blade 2 m Aluminium plate shaft wheel shaft Slider track

  6. Predictions

  7. Clockwise:Θ = 0.5 Definitions Ft W Fn M 2R R q y Clockwise:Θ = 0 x

  8. 2D vortex model results

  9. 2D point vortex model using empirical blade data Power coefficient Blade speed o – Moonraker, + – Darrieus

  10. chain Attachment link wheel Blade(carbon fibre) S/steel shaft Nylon pads (rapid prototyped) Aluminium plates

  11. Video PII_001.wmv

  12. Blade instrumentation concepts How to record the signal from the strain gauge? Distributed load Blade (hollow carbon fibre shell) Blade (hollow carbon fibre shell) Bending member Tracks Strain gauges Tracks Blade

  13. 61 mm Carbon fibre blade 9 mm Microlog bluetooth transceiver Microlog filter circuit (inside blade) Microlog main PCB Terminals

  14. Stainless steel rod Junction board Microlog main PCB Dual strain gauge 18 mm Holes for dowel pins Holes for cables Polished surfaces for strain gauges

  15. Microlog PCBs Nano batteries Bending member Charging circuit Epoxy escape holes Filled with Silicone Dowel pins Filled with epoxy Flush dowel pins

  16. QinetiQ Plc., Naval testing facilities, Haslar, near Portsmouth, UK

  17. Results: Fourier fitting

  18. Clockwise:Θ = 0.5 Recap: definitions Ft W Fn M 2R R q y Clockwise:Θ = 0 x

  19. Normal force

  20. Normal force

  21. Normal force

  22. Summary of results for force normal to blade’s motion, Fn Data here is for results with 3 blades

  23. Tangential force; 6 blades

  24. Tangential force; 6 blades

  25. 6 blades x – experiment o – vortex model (infinite blades) – vortex model (finite blades) for 6 blades

  26. Tangential force; 3 blades

  27. 3 blades ideal practical carriage wheels tangent tangent Track Track No Track No Track Cable-tie (slack) Cable-tie extended Tie clip (tight) Centrifugal force Centrifugal force Cable-tie connects trailing edge of blade to chain, to limit pitching during corners

  28. 3 blades

  29. Many thanks to … Kevin Drake, Adam Wojcik, Neil Collins,Richard Winn, Dan Fone, Peter Kelly, SinanHasan, SavvasAchilleos, Ian Eames, Christian Klettner, Andre Nicolle, Christian Jonsson, Tim McDonald, Tristan Smith, Ben Tompsen, Chris Pyke, Mike Johnson, Joachim Baumgaertner, And support from QinetiQ Plc., Norwin Electrics, Ashley Power Ltd., JRD Ltd. , NCGE, NESTA, EPSRC, UCL.

  30. Thank you… and questions www.londonmarinepower.co.uk (from Kaz: www.londonmarinepower.co.uk.nyud.net )

  31. Results: Fourier fitting

More Related