Question

In: Mechanical Engineering

Prob.3) A jet-powered aircraft flies at a speed of 320 m / s at an altitude...

Prob.3) A jet-powered aircraft flies at a speed of 320 m / s at an altitude of 9150 m, where the ambient conditions are 32 kPa and –32 ° C. The pressure ratio in the compressor is 12 and the temperature at the inlet of the turbine is 1,400 K. The air enters the compressor at a rate of 60 kg / s and the jet fuel has a calorific value of 42,700 kJ / kg. Assuming ideal operation for all constant specific components and heats for air at room temperature, draw the diagrams and determine:

a) the velocity of the exhaust gases,

b) the developed propulsion power, and

c) the propulsion efficiency and the fuel consumption rate.

Solutions

Expert Solution


Related Solutions

Prob. 2) A jet powered aircraft flies at a speed of 900 ft / s at...
Prob. 2) A jet powered aircraft flies at a speed of 900 ft / s at an altitude of 20,000 ft, where the ambient conditions are 7 psia and 10 ° F. The pressure ratio in the compressor is 13 and the temperature at the inlet of the turbine is 2400 R. Assuming an ideal operation for all specific components and heats constants for air at room temperature draw and graph the physical and T-S diagrams and determine: a) the...
A jet engine flies at 205 m/s at an altitude where the pressure is 0.466atm and...
A jet engine flies at 205 m/s at an altitude where the pressure is 0.466atm and the temp is 249K. The pressure recovery factor across the intake is 1.0 and the compressor pressure ratio is 30. Assume isentropic turbomachinery. A) determine flight mach number B) determine stagnation pressure and temp at the inlet of the intake C) determine the stagnation pressure and temp after the compeessor D) determine the stagnation temp change across the turbine drivibg the compressor
A Turbojet-engined aircraft flies at 350m/s at an altitude of 9000 m. The pressure at this...
A Turbojet-engined aircraft flies at 350m/s at an altitude of 9000 m. The pressure at this height is 30 kPa and the temperature is-32⁰ C. The pressure ratio of the compressor is 12, the turbine input temperature is 1400 K. Air enters the compressor with a flow of 60 kg/s and the heat value of the fuel is 42 700 kJ/kg. Admitting that adiabatic efficiency of compressor, turbine and Lule is 100% and specific temperatures are constant at room temperature,...
At an altitude where the air is at 35 kPa and -40°C a turbojet aircraft flies...
At an altitude where the air is at 35 kPa and -40°C a turbojet aircraft flies with a velocity of 260 m/s. Compressor has a pressure ratio of 10, and the temperature of the gases at the turbine inlet is 1100°C. Air enters the compressor at a rate of 45 kg/s. *Part(A)* Use *hot air standard assumptions* to find (a) the temperature and pressure of the gases at the turbine exit (b) the velocity of the gases at the nozzle...
A woman is riding a Jet Ski at a speed of 30 m/s and notices a...
A woman is riding a Jet Ski at a speed of 30 m/s and notices a seawall straight ahead. The farthest she can lean the craft in order to make a turn is 23
A jet is flying with an air speed of 500 m/s. A parcel is dropped out...
A jet is flying with an air speed of 500 m/s. A parcel is dropped out of the plane. Assume that it takes 40 seconds for the parcel to hit the ground.. Assume no air resistance.a. How high is the jet?b. How far forward horizontally from the spot where it leaves the jet, does the parcel move during those 40 seconds?c. Where is the parcel relative to the jet?
At takeoff a commercial jet has a 70.0 m/s speed. Its tires have a diameter of...
At takeoff a commercial jet has a 70.0 m/s speed. Its tires have a diameter of 0.400 m. (a) At how many rpm are the tires rotating?   rpm (b) What is the centripetal acceleration at the edge of the tire?   m/s2 (c) With what force must a determined 10-15 kg bacterium cling to the rim? N (d) Take the ratio of this force to the bacterium's weight. (force from part (c) / bacterium's weight) (a) A 23.0 kg child is...
1.At takeoff a commercial jet has a 65.0 m/s speed. Its tires have a diameter of...
1.At takeoff a commercial jet has a 65.0 m/s speed. Its tires have a diameter of 0.700 m. (a) At how many rpm are the tires rotating? ___ rpm (b) What is the centripetal acceleration at the edge of the tire? ____ m/s2 (c) With what force must a determined 10-15 kg bacterium cling to the rim? ____N (d) Take the ratio of this force to the bacterium's weight. ____(force from part (c) / bacterium's weight) 2.(a) A 19.0 kg...
The speed of light 3 × 108 m / s, can be expressed in terms of...
The speed of light 3 × 108 m / s, can be expressed in terms of other fundamental constants relating to electricity and magnetism. Give this algebraic expression and briefly explain where it comes from.
A bullet (m = 10 g) flies horizontally with an initial speed of v = 500...
A bullet (m = 10 g) flies horizontally with an initial speed of v = 500 m/s and then embeds itself in a block of wood (m = 400 g) that is at rest on a flat surface. The surface has a coefficient of kinetic friction μk = 0.4. After the impact, how far does the block of wood slide? (a) 40 m (b) 800 m (c) 8 m (d) 80 m (e) 20 m
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT