Problem *4.158[Difficulty: 3]CSmoving at speed UcdGiven:Water jet striking moving diskFind:Acceleration of disk when at a height of 3 mSolution:Basic equations: Bernoulli; Momentum flux in z direction (treated as upwards) for linear accelerating CVpρV22+gz⋅+constant=Assumptions: 1) Steady flow 2) Incompressible flow 3) Atmospheric pressure in jet 4) Uniform flow(All in jet)The Bernoulli equation becomesV022g0⋅+V122gz z0−()⋅+=V1V022g⋅z0z−⋅+=V115ms⋅⎛⎝⎞⎠229.81×ms2⋅03−⋅m⋅+=V112.9ms=The momentum equation becomesW−Marfz⋅−w1
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This note was uploaded on 10/19/2011 for the course EGN 3353C taught by Professor Lear during the Fall '07 term at University of Florida.