I was getting 35.4 but correct answer is 0.228. please help me to solve it A turbojet aircraft is flying with ambient conditionsof 40 kPa and -50 °C. The compressor consumeswork of 100 kW and combustion process suppliesheat of 797 kWWhen the propulsive power is 182 kW, determinethe system efficiency.Assume ideal system and ideal gas with constantspecific heat of 1.0 kJ/kg.K and specific heat ratioof 1.3

As we can see that there is so many additional data in this question but we need to calculate…

Answered: A turbojet aircraft is flying with…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Compressor accepts ideal gas at 25 C and compresses it to 75 C. During compression stage it gives off heat in the amount of 10 kJ/kg. Determine work of the compressor? (specific heat values are c_p=1 kJ/(kg*K), c_v=0.5 kJ/(kg*K)) A)15 kJ/kg B)70 kJ/kg C)60 kJ/kg D)35 kJ/kg E)50 kJ/kg
THERMODYNAMICS A 1.5-kW power output is produced by a small, high-speed turbine that runs on compressed air. The entrance state is 400 kPa and 52 degrees celcius, whereas the exit state is 150 kPa and -43 degrees celcius. Determine the needed mass flow rate of air through the turbine assuming low velocities and an adiabatic process.
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Where necessary, assume air as an ideal gas and consider R = 287J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and duringthis process, 5 kJ/kg heat is lost. (i) In analysing this nozzle using the 1st law of thermodynamics,the change in which type of energy is negligible? (ii) Determine the density and velocity of the air entering thenozzle. (iii) Calculate the density of the air as it leaves the nozzle.
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