Air flows into the atmosphere from a nozzle and strikes a vertical plate as shown in the figure below. A horizontal force of 12 N is required to hold the plate in place. Determine the reading on the pressure gage. Assume the flow to be incompressible and frictionless. p=? 12N Area = 0.003 m? Area = 0.01 m?

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
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Chapter6: Fundamental Dimensions And Units
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Air flows into the atmosphere from a nozzle and strikes a vertical plate as shown in the figure below. A horizontal force of 12 N
is required to hold the plate in place. Determine the reading on the pressure gage. Assume the flow to be incompressible and
frictionless.
p=?
12N
Area = 0.003 m2
Area = 0.01 m?
Control volume analysis concepts:
Momentum flux is a result of fluid motion across the control surface.
External forces, including surface forces and body forces act on a control volume.
The resultant force on a control volume results from the interaction of the momentum fluxes, surfaces, and body forces.
Multiple control volumes may be used within a problem.
The conservation equations for a fluid are a system of equations.
Begin by examining what is known and considering the control volume(s) needed.
Carefully consider the control volume that would allow the determination of the velocity of the air exiting the nozzle.
Transcribed Image Text:Air flows into the atmosphere from a nozzle and strikes a vertical plate as shown in the figure below. A horizontal force of 12 N is required to hold the plate in place. Determine the reading on the pressure gage. Assume the flow to be incompressible and frictionless. p=? 12N Area = 0.003 m2 Area = 0.01 m? Control volume analysis concepts: Momentum flux is a result of fluid motion across the control surface. External forces, including surface forces and body forces act on a control volume. The resultant force on a control volume results from the interaction of the momentum fluxes, surfaces, and body forces. Multiple control volumes may be used within a problem. The conservation equations for a fluid are a system of equations. Begin by examining what is known and considering the control volume(s) needed. Carefully consider the control volume that would allow the determination of the velocity of the air exiting the nozzle.
(f) What is the gage pressure of the jet traveling radially outward beyond the edges of the plate?
p= i 1.819
kPa
(g) What is the gage pressure acting on the right-hand face of the plate?
p = i 4
kPa
Transcribed Image Text:(f) What is the gage pressure of the jet traveling radially outward beyond the edges of the plate? p= i 1.819 kPa (g) What is the gage pressure acting on the right-hand face of the plate? p = i 4 kPa
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