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Homework Help: Function of a flywheel

  1. Apr 23, 2010 #1
    1. The problem statement, all variables and given/known data
    This problem from Applied mechanics J Hannah M J Hilier
    An engine flywheel consist essentially of a ring of cast iron of density 7200 kg/ m3 .The flywheel has to deal with a fluctuation of energy of 22500 J at mean speed of 6 rev/s with a limit of +- 0,5 per cent on variation in speed .The maximum centrifugal stress in flywheel is not to exceed 5.5 MN/m2 .Find mean diameter and cross-sectional area of the rim .
    answers Deameter mean=1464 mm area =0.089 m2



    2. Relevant equations
    greatest fluctuation of energy=IaW2


    3. The attempt at a solution
    stress=density *[angular velocity]square * [radius mean]square
     
    Last edited: Apr 23, 2010
  2. jcsd
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