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Team 12 Vortex for Hydro Turbine

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					        Senior Project


VORTEX GENERA TOR FOR HYDRO TURBIN E

             KARSON WONG
              JOHNSON NG
          SNEHIL RAISING HAN I
                    Introduction

 Vortex generator for a Hydro Turbine
 Tide Energy
 Evaluate Initial Design
                           Goal


1.   To increase the efficiency of the initial design
     Hydro Turbine
                       Design Challenges

1. Gulfstream current with average speed of 1 to 3
   knots.
2. Vortex generation
3. Design Optimization
        Number of vortex channels
        Vortex angles
        Inlet and outlet curves and lengths
        Maximize negative pressure between inlet and outlet
        Rotor foil curves and contours
        Diffuser slot sizes and spacing
                      Conceptual Design

 Initial Design
 Smooth Funnels
 ж   Axial Flow

 ж   No vortex fins
                Design of The Inlet Funnel


•Implement vortex streams
•Velocity increase
   •Flow Rate = Velocity x Area
         Design For The Outlet Funnel


•Improve outlet flow
•Vacuum induction effect
               Final Conceptual Design


Inlet Function
    Vortex
    Increase Velocity

Outlet Function
   Vacuum
                        Vortex

 There are two types of vortices.
  -Forced vortex
  -Free vortex
 The streamlines of the gulf stream follow a straight
  path.(axial flow)
 The aim is to create a vortex via the inlet funnel and
  fins.
     Velocity Distribution




Free Vortex           Forced Vortex
                 Angle of Attack




 This concept will be used to decide the positioning
 and contours of the rotor blades, in order to
 maximize power output.
                 Prototype Scaling

 In order to successfully design a scaled down
  prototype, dimensional analysis would have to be
  performed.
 Various ratios need to be analyzed.
                    Conclusion

 Great alternative energy resource
 Long term goals
 - To be commercially built
 - To connect multiple turbines in series to
 produce more power
Thank you



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posted:10/20/2011
language:Swedish
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