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Why i'm getting negative Cp in Cp v TSR graph

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2019-05-28
2019-07-05
  • Saimon Abir

    Saimon Abir - 2019-05-28

    Hi. I'm new to this softwere and trying to learn in day by day. Can anyone tell me why i am getting negative value of Cp in the graph? How can i solve this problem? I've attached a picture. Thank you.

     
    • binil babu

      binil babu - 2019-05-29

      The Cp is of a wind turbine is maximum for a unique TSR. TSR is given by the equation TSR = (omega*R)/ U; which means at higher TSR the inlet wind velocity is slow. That may be the reason for negative Cp.

       
  • binil babu

    binil babu - 2019-05-29

    The Cp of a wind turbine is maximum for a unique TSR.

     
  • David

    David - 2019-07-05

    At large TSR's the turbine is acting like a propeller and is adding momentum to the fluid resulting in a negative power coefficient.

     

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