Question

A jet engine is operating at an altitude of 7000 m. The mass of air passing...

A jet engine is operating at an altitude of 7000 m. The mass of air passing through the engine is 46 kg/s and the heat addition in the combustion chamber is 500 kJ/kg. The cross-sectional area of the combustion chamber is 0.5 m2, and the air enters the chamber at a pressure of 80 kPa and a temperature of 80°C. After the combustion chamber, the products of combustion, which can be assumed to have the properties of air, are expanded through a convergent nozzle to match the atmospheric pressure at the nozzle exit. Estimate the nozzle exit diameter and the nozzle exit velocity assuming the flow in the nozzle is isentropic. State the assumptions that have been made.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Air enters the diffuser of a jet engine operating at a steady state at a pressure...
Air enters the diffuser of a jet engine operating at a steady state at a pressure of 18 kPa, a temperature of 213 K and a velocity of 285 m/s. The air flows adiabatically through the diffuser and exits at a temperature of 240 K. Using the ideal gas model for the air, please determine the velocity of the air at the diffuser exit, in m/s.
A turboprop engine consists of a diffuser, compressor, combustor, turbine, and nozzle. The turbine drives a...
A turboprop engine consists of a diffuser, compressor, combustor, turbine, and nozzle. The turbine drives a propeller as well as the compressor. Air enters the diffuser with a volumetric flow rate of 63.7 m3/s at 40 kPa, 240 K, and a velocity of 180 m/s, and decelerates essentially to zero velocity. The compressor pressure ratio is 10 and the compressor has an isentropic efficiency of 85%. The turbine inlet temperature is 1240 K, and its isentropic efficiency is 85%. The...
Consider the turbocharger of an internal combustion engine. The exhaust gases enter the turbine at 450...
Consider the turbocharger of an internal combustion engine. The exhaust gases enter the turbine at 450 °C at a rate of 0.02 kg/s and leave at 400 °C. Air enters the compressor at 70 °C and 95 kPa at a rate of 0.018 kg/s and leaves at 135 kPa. The mechanical efficiency between the turbine and the compressor is 95 percent (5 percent of turbine work is lost during its transmission to the compressor). Using air properties for the exhaust...
I ONLY NEED ANSWERS TO F.) AND G.) I SOLVED THE REST. THANK YOU! The Boeing...
I ONLY NEED ANSWERS TO F.) AND G.) I SOLVED THE REST. THANK YOU! The Boeing 747 has a cruising altitude of 45,000 feet and cruising speed of 275 m/s. At this elevation, the temperature and pressure according to the US Standard Atmosphere (air properties as a function of altitude) are 220K and 1.8x104 Pa, respectively. The engines are steady state devices that can be modeled using the 1st Law of Thermodynamics with air (ideal gas) as the working fluid...
A single shaft gas turbine engine receives air at atmospheric conditions of 14.7 psia and 80...
A single shaft gas turbine engine receives air at atmospheric conditions of 14.7 psia and 80 degrees F. The compressor discharge pressure is 103psia and the compressor efficiency is 87%. The turbine inlet temperature is 1980 degrees F and the exhaust temperature is 1173 degrees F. Assume a 3 psi pressure drop in the combustion chamber and that inlet and exhaust ducts losses are both 27.7 inches of water. Find: a) Sketch the system and label the state point locations...
1) A nozzle is a device for increasing the velocity of a steadily flowing stream of...
1) A nozzle is a device for increasing the velocity of a steadily flowing stream of fluid. At the inlet to a certain nozzle the enthalpy of the fluid is 3025 kJ/kg and the velocity is 60 m/s. At the exit from the nozzle the enthalpy is 2790 kJ/kg. The nozzle is horizontal and there is negligible heat loss from it. (i) Find the velocity at the nozzle exit. (ii) If the inlet area is 0.1 m2 and specific volume...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT