lecture06 - Wave Energy Origin of waves Ocean waves Energy...

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ENGRI 1290 1 Wave Energy Origin of waves Ocean waves Energy converters
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ENGRI 1290 2 Lecture’s objectives • Origin of waves – Interaction between wind and waves •O c e a n w a v e s – Characterization –Wa ve powe r • Energy converters – The many different types of converters – Example: buoy type converters
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ENGRI 1290 3 Wave generation Ocean waves are caused by wind. A flat ocean surface has ripples due to local water motion. As the wind blows, the air flow streamlines come closer above the ripples. Remember that no air flow across stream lines. The stream lines are like pipes through which the flow travels. Closer Streamlines Using mass flow conservation, the flow at the crest of the wave is faster than in the trough. If the air velocity is faster at the top of the wave then the air pressure is lower and the top of the wave is sucked up. As a result streamlines come together even more and the phenomenon is amplified until saturation (due to instabilities).
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ENGRI 1290 4 Important characteristics of wave motion c Let’s take ocean waves of velocity c
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This note was uploaded on 09/14/2011 for the course ENGRI 1290 taught by Professor Gourdain during the Fall '10 term at Cornell University (Engineering School).

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lecture06 - Wave Energy Origin of waves Ocean waves Energy...

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