Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 16, Problem 16.22PP
Shown in Fig. 16.20 is a small decorative wheel fitted with flat paddles so the wheel turns about its axis when acted on by a blown stream of air. Assuming that all the air in a
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16.22 Shown in Fig. 16.20 is a small decorative wheel fitted with flat paddles so the wheel turns about its axis when acted on by a blown stream of air. Assuming that all the air in a 15-mm-diameter stream moving at 0.35 m/s strikes one paddle and is deflected by it at right angles, compute the force exerted on the wheel initially when it is stationary. The air has a density of 1.20 kg/m 3
Solve the following problems.
1. A pipe bends through an angle of 90° in the vertical plane. At the inlet it has a cross-
sectional area of 0.003 m and a gauge pressure of 500 KPa. At exit it has an area of
0.001 m2 and a gauge pressure of 200 KPa. Calculate the vertical and horizontal forces
due to the pressure only.
2. Calculate the momentum force on a 180° bend that carries 5 kg/s of water. The pipe is
500 mm bore diameter throughout. The density is 1000 kg/m2.
Calculate the helicopter rotor blade’s rotational speed and the lift generated by the helicopter's rotor blade.
Chapter 16 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 16 - Calculate the force required to hold a flat plate...Ch. 16 - What must be the velocity of flow of water from a...Ch. 16 - Calculate the force exerted on a stationary curved...Ch. 16 - A highway sign is being designed to withstand...Ch. 16 - Compute the forces in the vertical and horizontal...Ch. 16 - Figure 16.13 O shows a free stream of water at 180...Ch. 16 - Compute the horizontal and vertical forces exerted...Ch. 16 - In a plant where hemispherical cup-shaped parts...Ch. 16 - A stream of non-flammable oil (sg 5 0.90) is...Ch. 16 - A 2 -in-diameter stream of water having a velocity...
Ch. 16 - Figure 16.17 O represents a type of flowmeter in...Ch. 16 - Water is piped vertically from below a boat and...Ch. 16 - A 2 -in nozzle is attached to a hose with an...Ch. 16 - Seawater (sg 5 1.03) enters a heat exchanger...Ch. 16 - A reducer connects a standard 6 -in Schedule...Ch. 16 - Calculate the force on a elbow attached to an in...Ch. 16 - Calculate the force required to hold a 90 elbow in...Ch. 16 - Calculate the force required to hold a 180 close...Ch. 16 - A bend in a tube causes the flow to turn through...Ch. 16 - A vehicle is to be propelled by a jet of water...Ch. 16 - A part of an inspection system in a packaging...Ch. 16 - Shown in Fig. 16.20 is a small decorative wheel...Ch. 16 - For the wheel described in Problem 16.22. compute...Ch. 16 - A set of louvers deflects a stream of warm air...Ch. 16 - Prob. 16.25PPCh. 16 - Prob. 16.26PPCh. 16 - Figure 16.22 shows a device for clearing debris...Ch. 16 - Prob. 16.28PPCh. 16 - Figure 16.23 is a sketch of a turbine in which the...Ch. 16 - Repeat Problem 16.29 with the blade rotating as a...Ch. 16 - Repeat Problem 16.29, except with the blade...
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- A stationary water tank of diameter D is mounted on wheels and is placed on a nearly frictionless level surface. A smooth hole of diameter Do near the bottom of the tank allows water to jet horizontally and rearward and the water jet force propels the system forward. The water in the tank is much heavier than the tank-and-wheel assembly, so only the mass of water remaining in the tank needs to be considered in this problem. Considering the decrease in the mass of water with time, develop relations for (a) the acceleration, (b) the velocity, and (c) the distance traveled by the system as a function of time.arrow_forwardA steel pulley with a mean rim radius of 120 mm is rotated at a speed of 1100 rpm. If the mass of the rim is 5 kgs, What is the centrifugal force?arrow_forwardA vertical cylindrical container contains 5840 gallons of gasoline and is 1.53 m in radius. Due to evaporation within the tank, the pressure on the top of the fluid is 2.5 times normal atmospheric pressure. The density of gasoline is 737 kg/m3. a. What is the pressure at the bottom of the tank? b. If a nozzle at the bottom of the tank is used to let fuel out, with what velocity would the gasoline exit the hole? c. If a nozzle at the bottom of the tank is used to let fuel out, what volume flow rate will result if the diameter of the hole is 1.2 cm? d. At what initial rate will the height of the fuel level in the tank drop as fuel is removed?arrow_forward
- Q.1) A ball is shot at high speed into a frictionless channel that is in the shape of a segment of a circle with center at 0.The channel is frictionless and sits on a horizontal table top.The figure shown is the top view. Which of the following force(s) are acting on the ball when it is within the frictionless channel at position B? Explain your answers. Check all that apply. A downward force of gravity. A force pointing from O to B. A force in the direction of motion. A force pointing from B to O. Which path would the ball most closely follow after it exits the channel at C and moves across the frictionless table top? L L Larrow_forwardFigure 16.23 is a sketch of a turbine in which the incom- ing stream of water at 15°C has a diameter of 7.50 mm and is moving with a velocity of 25 m/s. Compute the force on one blade of the turbine if the stream is deflected through the angle shown and the blade is stationary.arrow_forwardThe air flow through a jet engine is 30 kg/s and the fuel flow is 1 kg/s. The exhaust gases leave with a relative velocity of 610 m/s. Pressure equilibrium exists over the exit plane. Compute the velocity of the airplane if the thrust power is 1.12 x 108 W.arrow_forward
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