Practice Nozzle And Diffuser Efficiency (8.2) - Compressible Flow

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9 questions

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6 sample questions

Question 1.
Define isentropic efficiency.
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Think about the ideal conditions versus actual performance.
Question 2.
What does a nozzle do?
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Consider how pressure and velocity interact.
3Question 3.
What is isentropic efficiency?
- A ratio of actual to ideal performance
- The ratio of pressure rising
- Efficiency at rest
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Consider what makes a process efficient.
4Question 4.
True or False: Higher isentropic efficiency means lower energy losses.
- True
- False
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Reflect on what efficiency means.
Question 5.
A rocket nozzle has real kinetic energy changes of 270 J, while the ideal case is 450 J. What is the nozzle's efficiency, and how can it be improved?
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Think about what design changes could be incorporated.
Question 6.
If a diffuser shows a pressure rise of 24 kPa when the isentropic prediction was 40 kPa, evaluate its efficiency and suggest what might cause this discrepancy.
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Consider factors that hinder ideal performance.

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