Problem 4.134[Difficulty: 3]CS(moves to left at speed Vc)y x cdRxVj+ VcVj+ Vct R Given:Water jet striking moving coneFind:Thickness of jet sheet; Force needed to move coneSolution:Basic equations: Mass conservation; Momentum flux in x directionAssumptions: 1) Steady flow 2) Incompressible flow 3) Atmospheric pressure in jet 4) Uniform flow 5) Jet relative velocity isconstantThenρ−V1⋅A1⋅ρV2⋅A2⋅+0=ρ−VjVc+()⋅πDj2⋅4⋅ρVjVc+⋅2⋅π⋅R⋅t⋅+0=(Refer to sketch)HencetDj28R⋅=t184in⋅2×19in⋅×=t0.222 in⋅=Using relative velocities, x momentum isRxu1ρ−V1⋅A1⋅⋅u2ρV2⋅A2⋅
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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.