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3 cards from this section. Quick, good the night before a test.
What happens to the velocity of fluid in a subsonic diffuser?
Think about how the area changes in a diffuser.
Define isentropic efficiency in a simple term.
Consider how we measure effectiveness.
What is the primary function of a diffuser?
Consider how fluid dynamics work in a diverging channel.
Isentropic efficiency compares actual performance to ideal performance.
Focus on efficiency comparison statements.
A supersonic jet is observed to have a converging diffuser with an initial pressure of 2 atm and a final pressure of 3 atm. If the initial velocity is 250 m/s, how much does the velocity decrease after passing through the diffuser?
Focus on applying the ideal gas law and the conservation of mass.
Calculate the isentropic efficiency of a nozzle if it allows a gas to increase speed from 40 m/s to 100 m/s while the ideal speed calculated is 120 m/s.
Use the kinetic energy formula for calculation.
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