VORTEX GENERATOR FOR HYDRO TURBINE

KARSON WONGJOHNSON NG

SNEHIL RAISINGHANI

Senior Project

Introduction

Vortex generator for a Hydro TurbineTide EnergyEvaluate 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 generation3. 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 DesignSmooth Funnelsж 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 FunctionVortex Increase

Velocity

Outlet FunctionVacuum

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 resourceLong term goals

- To be commercially built- To connect multiple turbines in series to produce more power

Thank you

Questions?