tidal_turbine - 2.23 Hydrofoils Propellers Tidal Turbine...

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2.23 Hydrofoils & Propellers Tidal Turbine Design Project Spring 2007 Introduction: A design project for 2.23 Hydrofoils & Propellers entails the design of a n-stream tidal tubine for extracting energy from the stream velocity in a tidal estuary. The stream flowrate varies over time, and since the estuary is fed by a freshwater river, the outgoing tide velocity is higher than the incoming tide velocity. Thus the inflow is a biased sinusoidal input. The design should including blade design , efficiency and power extraction calculations. Consideration of cavitation in the design of the blade sections must be addressed in the calculations and design (a cavitation free design is desired). Design Specifics: The overall specifications for the project are outlined below: - Incoming tide maximum speed Speed 2 m/s - Outgoing tide maximum speed 2.5 m/s - Tidal inflow function: Biased sinusoidal - Inflow wake velocity variation (circumferential) +/-0.3 m/s - Turbine diameter: 6 meters - Design depth: 5m to turbine centerline - Rotational speed:
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