Engineering, 06.04.2021 01:00 Nateycorn95701

A non-afterburning turbojet is being designed for operation at an altitude of 15 km and a Mach number of 1.8. The maximum stagnation temperature at the inlet of the turbine is 1500 K. The fuel is a jet fuel having a LHV of 43124 kJ/kg and fst is 0.06. The following efficiencies apply at this Mach number: Î·d= 0.09
Î·c=0.9
Î·b= 0.98
rb= 0.97
Î·t= 0.92
Î·n= 0.98

Use a gamma value of 1.4 up to and including the burner inlet, and a value of 1.3 for the rest of the engine. Assume R = 0.287 kJ/kgK throughout the engine (note that specific heats may be calculated from knowing gamma and R). Plot the specific thrust, TSFC, thermal, propulsion and overall efficiencies as a function of the total pressure ratio across the compressor, r_c. Consider arrange of r_c from 2 to 60. Also plot the nozzle area ratio (exit to throat) as a function of r_c.

Answers: 1

Show answers

Another question on Engineering

Engineering, 03.07.2019 14:10

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Answers: 2

Answer

Engineering, 04.07.2019 18:10

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

Answers: 1

Answer

You know the right answer?

A non-afterburning turbojet is being designed for operation at an altitude of 15 km and a Mach numbe...

Questions