Questions from Thermal Fluid Science

Q: Reconsider Prob. 8–116. Using appropriate software, redo

Reconsider Prob. 8–116. Using appropriate software, redo the problem by including the effects of the kinetic energy of the flow by assuming an inlet-to-exit area ratio of 1.5 for the...

Q: The adiabatic compressor of a refrigeration system compresses saturated R-134a

The adiabatic compressor of a refrigeration system compresses saturated R-134a vapor at 0°C to 600 kPa and 50°C. What is the isentropic efficiency of this compressor?

Q: Air is compressed by an adiabatic compressor from 95 kPa and 27

Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) th...

Q: A pressure cooker cooks a lot faster than an ordinary pan by

A pressure cooker cooks a lot faster than an ordinary pan by maintaining a higher pressure and temperature inside. The lid of a pressure cooker is well sealed, and steam can escape only through an ope...

Q: A piston–cylinder device contains superheated steam. During an actual

A piston–cylinder device contains superheated steam. During an actual adiabatic process, the entropy of the steam will (never, sometimes, always) increase.

Q: Argon gas enters an adiabatic compressor at 14 psia and 75°

Argon gas enters an adiabatic compressor at 14 psia and 75°F with a velocity of 60 ft/s, and it exits at 200 psia and 240 ft/s. If the isentropic efficiency of the compressor is 87 percent, determine...

Q: An adiabatic steady-flow device compresses argon at 200 kPa and

An adiabatic steady-flow device compresses argon at 200 kPa and 27°C to 2 MPa. If the argon leaves this compressor at 550°C, what is the isentropic efficiency of the compressor?

Q: Air enters an adiabatic nozzle at 45 psia and 940°F

Air enters an adiabatic nozzle at 45 psia and 940°F with low velocity and exits at 650 ft/s. If the isentropic efficiency of the nozzle is 85 percent, determine the exit temperature and pressure of th...

Q: Reconsider Prob. 8–122E. Using appropriate software, study

Reconsider Prob. 8–122E. Using appropriate software, study the effect of varying the nozzle isentropic efficiency from 0.8 to 1.0 on both the exit temperature and pressure of the air, and plot the res...

Q: An adiabatic diffuser at the inlet of a jet engine increases the

An adiabatic diffuser at the inlet of a jet engine increases the pressure of the air that enters the diffuser at 11 psia and 30°F to 20 psia. What will the air velocity at the diffuser exit...