Discuss the back pressure-sonic condition, Mechanical Engineering

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Discuss the back pressure-sonic condition

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Q: A convergent-divergent nozzle has a throat area of 100 mm2 and an exit area of 175 mm2. The inlet flow is helium at a total pressure of 1 MPa, stagnation temperature of 375 K. What is the back pressure that will give sonic condition at the throat, but subsonic everywhere else?

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Mechanical Engineering: Discuss the back pressure-sonic condition

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