Engineering, 05.11.2020 18:30 jennaranelli05

A JT9D high-bypass-ratio turbofan engine at maximum static power on a sea-level, standard day (P_0 = 14.696 psia, T_0 = 518.7 degree R, and V_0 = 0) has the data listed in Appendix B. a. Calculate the adiabatic and polytropic efficiencies of the fan. Assume gamma = 1.4.
b. Calculate the adiabatic and polytropic efficiencies of the low-pressure and high-pressure compressors. Assume γ=1.4 for the low-pressure compressor and γ=1.39 for the high-pressure compressor.
c. Calculate the adiabatic polytropic efficiencies of the turbine. Assume gamma = 1.35.
d. Calculate the power (horsepower and kilowatts) into the fan and compressors. Assume R_gc = 1716 ft^2/(s^2. degree R) and the gamma of parts b and c.
e. Calculate the power (horsepower and kilowatts) from the turbine for a mass flow rate of 251 lbm/s. Assume gamma = 1.31 and Rg_c = 1716 ft^2/(s^2. degree R).
f. How do the results of parts d and e compare?

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

Answers: 3

Answer

Engineering, 04.07.2019 19:20

Apure substance is a)-mixture of various chemical elements or compounds b)-substance that has a fixed chemical composition throughout c)-mixture that is homogeneous (such as air) d)-all the answers

Answers: 3

Answer

Engineering, 04.07.2019 19:20

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.

Answers: 1

Answer

Engineering, 06.07.2019 04:20

In modern manufacturing, which types of metal chips would be undesirable and why ? ?

Answers: 3

Answer

You know the right answer?

A JT9D high-bypass-ratio turbofan engine at maximum static power on a sea-level, standard day (P_0 =...

Questions