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Helium at 200 kPa, 227 C is expanded in steady flow through a nozzle to 100...

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Mechanical Engineering

Helium at 200 kPa, 227 C is expanded in steady flow through anozzle to 100 kPa. At these operating conditions the nozzleefficiency is 76%.

a) Making the usual nozzle assumptions, calculate the actualvelocity at the nozzle exit. Start with the appropriate form of thefirst law.

b) Calculate the actual nozzle exit temperature.

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