Problem 4.69 - R x 4 1.94 slug ft 3 15 ft s 2 1 3 ft 2 1 1...

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Problem 4.69 [Difficulty: 2] CS x c y R x d V V Given: Water jet hitting plate with opening Find: Force generated on plate; plot force versus diameter d Solution: Basic equation: Momentum flux in x direction Assumptions: 1) Steady flow 2) Incompressible flow 3) Atmospheric pressure throughout 4) Uniform flow Hence R x u 1 ρ u 1 A 1 () u 2 ρ u 2 A 2 () + = ρ V 2 π D 2 4 ρ V 2 π d 2 4 + = R x πρ V 2 D 2 4 1 d D 2 = (1) For given data
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Unformatted text preview: R x 4 1.94 slug ft 3 15 ft s 2 1 3 ft 2 1 1 4 2 lbf s 2 slug ft = R x 35.7 lbf = From Eq 1 (using the absolute value of R x ) 0.2 0.4 0.6 0.8 1 10 20 30 40 Diameter Ratio (d/D) Force (lbf) This graph can be plotted in Excel...
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