1. Suppose a convergent-divergent nozzle is operated as case h in Fig. 15.17. What kind of nozzle could have the same exit pressure, but with a reversible flow?
2. A stationary thermometer measures 80?C in an air flow that has a velocity of 200 m/s. What is the actual flow temperature?
3. Steam leaves a nozzle with a pressure of 500 kPa, a temperature of 350?C, and a velocity of 250 m/s. What are the isentropic stagnation pressure and temperature?