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Homework Help: Parabolic equation for speed of air, help needed please.

  1. Oct 14, 2013 #1
    1. The problem statement, all variables and given/known data

    Determine the speed of air at 1,2,3,4 mm from the middle of a wind turbine blade at a section 4 meters from the hub, given that the free stream velocity is 7 m/s and the turbine is moving at a speed of 18 RPM. The air temp is 27 degrees c. The length of the aerofoil is 8 meters long at a section 4 meters from the hub. Use the parabolic equation from the boundary layer theory.

    2. Relevant equations

    Parabolic equation

    3. The attempt at a solution

    0.3 m/s @ 1mm
    0.58 m/s @ 2mm
    0.88 m/s @ 3mm
    1.16 m/s @ 4mm

    I would highly appreciate your expert advice if my answer's are correct please. Thank you in advance.
  2. jcsd
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