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Velocity diagram for a rotating blade

  1. Mar 14, 2015 #1
    1. The problem statement, all variables and given/known data
    http://postimg.org/image/5o9kcuj57/
    I do not understand what the vectors W and V represent
    2. Relevant equations


    3. The attempt at a solution
    I know U is the tip speed velocity but I don't know about the other two
     
  2. jcsd
  3. Mar 19, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
     
  4. Mar 19, 2015 #3

    haruspex

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    It's hard to be sure because the angles alpha and beta are not shown in the upper diagram.
    At a guess, beta is the angle the blade makes to the inner hub. W could be a velocity vector relative to the blade, e.g. representing a flow of fluid along the blade surface. V would then be the velocity vector relative to the ground.
     
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