Power is adjusted in a gas turbine engine by
- increasing fuel flow.
- increasing air and fuel flow.
- increasing airflow to the combustion chamber.
JD2016 asking:
How exactly is the air flow increased? Is it not the case that to draw more air into the engine, the compressor needs more power which needs more power output from the turbine which means higher fuel flow first.
Community Comments (3)
J
JD2016 Posts: 54 20.11.2016 / 21:37
Another version of this question gives adjusting fuel flow only, as the answer.
J
JD2016 Posts: 54 08.12.2016 / 21:40
Page 96 of "The Jet Engine" - published by Rolls Royce:
"The control of power or thrust of the gas turbine engine is effected by regulating the quantity of fuel injected into the combustion system. When a higher thrust is required,the throttle is opened and the pressure to the fuel spray nozzles increases due to the greater fuel flow. This has the effect of increasing the gas temperature, which in turn increases the acceleration of the gases through the turbine to give a higher engine speed and a correspondingly greater airflow, consequently producing an increase in engine thrust."
"The control of power or thrust of the gas turbine engine is effected by regulating the quantity of fuel injected into the combustion system. When a higher thrust is required,the throttle is opened and the pressure to the fuel spray nozzles increases due to the greater fuel flow. This has the effect of increasing the gas temperature, which in turn increases the acceleration of the gases through the turbine to give a higher engine speed and a correspondingly greater airflow, consequently producing an increase in engine thrust."
J
Jordi Posts: 198 05.07.2020 / 15:51
so it this question wrong?
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