Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
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Textbook Question
Chapter 4, Problem 101P
A freshwater jet boat takes in water through side vents and ejects it through a nozzle of diameter D = 75 mm; the jet speed is Vj. The drag on the boat is given by Fdrag = kV2, where V is the boat speed. Find an expression for the steady speed, V, in terms of water density ρ, flow rate through the system of Q, constant k, and jet speed Vj. A jet speed Vj = 15 m/s produces a boat speed of V = 10 m = s.
- (a) Under these conditions, what is the new flow rate Q?
- (b) Find the value of the constant k.
- (c) What speed V will be produced if the jet speed is increased to Vj = 25 m/s?
- (d) What will be the new flow rate?
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Figure 1) shows a tank of 20∘C water with a nozzle h = 27 cm below the surface. Bernoulli's equation applies to the flow between points 1 and 2 on the streamline, but not to the flow between points 2 and 3.What is the volume flow rate through the nozzle in L/min ? Assume that the water level in the tank is held constant.
6.36 This two-dimensional water (at 50°F) jet is deflected by the two-dimensional vane, which is moving to the right with a speed of 60 ft/s. The initial jet is 0.30 ft thick (vertical dimension), and its speed is 100 ft/s. What power per foot of the jet (normal to the page) is transmitted to the vane? See §6.5 for useful knowledge about moving CVs.
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h1= 0.65m h2= 0.1m h3= 0.75m h4= 0.45m
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Chapter 4 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
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