Why is the combustion temperature in a turbojet engine kept low?

Question

Why the temperature of hot gas entering the turbine is maintained far below the adiabatic combustion temperature?

Because there is no material to build a turbine stage able to sustain the combustion temperature? — mins, Apr 29 '16 at 17:52

score 2 · Accepted Answer · edited Apr 13 '17 at 12:59

2

Because the fuel-air mixture in a turbine is much leaner than what it would be for a stoichiometric combustion. It needs to stay lean to restrict the maximum gas temperature inside the engine - higher temperatures lead to exponentially shorter lives of the turbine components.

edited Apr 13 '17 at 12:59

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answered Apr 29 '16 at 19:36

Peter Kämpf

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Why is the combustion temperature in a turbojet engine kept low?

1 Answers1