hw2 - MAE 101B Summer Session II 2009 Homework Assignment...

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MAE 101B – Summer Session II 2009 Homework Assignment #2 Due Friday August 18 1. Ignoring frictional losses and assuming steady flow (tank is very large) and parallel streamlines at the exit, what happens to the exit velocity and volume flow rate when you add a diffuser? (a) Express exit velocity and volume discharge in terms of pressure head, H, and exit area A 2 . (b) Express exit velocity and volume discharge in terms of pressure head, H, and exit area A 3 . (c) Neglecting friction which is the correct statement: discharge flow rate at T(top) is greater, equal or less than B (bottom). Figure (a) Figure (b) Figure (c) 2. Prove that squeezing the end of your garden hose will only increase the exit flow speed (V 2 / V 1 > 1) if which of the following conditions is satisfied: f L / D > 1; f L / D = 1 ; or f L / D < 1. Assume: turbulent flow; all losses are due to pipe friction; V 1 2 << V 2 2 ; and “f” for piping is the same with and without the nozzle. 3.
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hw2 - MAE 101B Summer Session II 2009 Homework Assignment...

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