68 m3/s of air enters a combustion chamber of a jetengine at a velocity of 418 m/s at -59 °C and 31 kPa.The air leaves the chamber at 944 m/s at 187 °C.Determine the fuel (in kg) consumed during a 30minute flight. Assume that changes in air mass flowrate through the chamber are not significant andAh = CPAT. Take the air gas constant to be 0.287kPa.m3/kg.K, the specific heat of air to be 1 kJ/(kgK)and the heating value of the fuel to be 42,024 kJ/kg.Give your answer to the nearest kg.

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Answered: Determine the fuel (in kg) consumed…

Engineering

Mechanical Engineering

Determine the fuel (in kg) consumed during a 30 minute flight. Assume that changes in air mass flow

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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Concept explainers

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.

Question

68 m3/s of air enters a combustion chamber of a jet
engine at a velocity of 418 m/s at -59 °C and 31 kPa.
The air leaves the chamber at 944 m/s at 187 °C.
Determine the fuel (in kg) consumed during a 30
minute flight. Assume that changes in air mass flow
rate through the chamber are not significant and
Ah = CPAT. Take the air gas constant to be 0.287
kPa.m3/kg.K, the specific heat of air to be 1 kJ/(kgK)
and the heating value of the fuel to be 42,024 kJ/kg.
Give your answer to the nearest kg.

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