Questions from Thermal Fluid Science

Q: Air enters a nozzle steadily at 50 psia, 140°F

Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5 Btu/lbm of air flowing. The inlet area of the no...

Q: Air at 600 kPa and 500 K enters an adiabatic nozzle that

Air at 600 kPa and 500 K enters an adiabatic nozzle that has an inlet-to-exit area ratio of 2:1 with a velocity of 120 m/s and leaves with a velocity of 380 m/s. Determine (a) the exit temperature and...

Q: Does the amount of mass entering a control volume have to be

Does the amount of mass entering a control volume have to be equal to the amount of mass leaving during an unsteady flow process?

Q: Carbon dioxide enters an adiabatic nozzle steadily at 1 MPa and 500

Carbon dioxide enters an adiabatic nozzle steadily at 1 MPa and 500°C with a mass flow rate of 6000 kg/h and leaves at 100 kPa and 450 m/s. The inlet area of the nozzle is 40 cm2. Determine (a) the in...

Q: Steam enters a nozzle at 400°C and 800 kPa with

Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 375°C and 400 kPa while losing heat at a rate of 25 kW. For an inlet area of 800 cm2, determin...

Q: Air at 80 kPa and 127°C enters an adiabatic diffuser

Air at 80 kPa and 127°C enters an adiabatic diffuser steadily at a rate of 6000 kg/h and leaves at 100 kPa. The velocity of the airstream is decreased from 230 to 30 m/s as it passes through the diffu...

Q: Air at 13 psia and 65°F enters an adiabatic diffuser

Air at 13 psia and 65°F enters an adiabatic diffuser steadily with a velocity of 750 ft/s and leaves with a low velocity at a pressure of 14.5 psia. The exit area of the diffuser is 3 times...

Q: Refrigerant-134a at 700 kPa and 120°C enters an

Refrigerant-134a at 700 kPa and 120°C enters an adiabatic nozzle steadily with a velocity of 20 m/s and leaves at 400 kPa and 30°C. Determine (a) the exit velocity and (b) the ratio of the inlet to ex...

Q: The maximum blood pressure in the upper arm of a healthy person

The maximum blood pressure in the upper arm of a healthy person is about 120 mmHg. If a vertical tube open to the atmosphere is connected to the vein in the arm of the person, determine how high the b...

Q: Refrigerant-134a enters a diffuser steadily as saturated vapor at 600

Refrigerant-134a enters a diffuser steadily as saturated vapor at 600 kPa with a velocity of 160 m/s, and it leaves at 700 kPa and 40°C. The refrigerant is gaining heat at a rate of 2 kJ/s as it passe...