Definition
The rapid chemical reaction between fuel and oxygen that releases heat and expanding gases. In a gas turbine engine, combustion occurs continuously inside the combustion chamber, where compressed air is mixed with fuel and ignited to produce a steady stream of high-energy gas that drives the turbine and produces thrust.
Plain English
Burning. Fuel mixes with air, ignites, and releases heat and pressure. In a jet engine, this burning happens nonstop inside a chamber to keep the engine running.
Context Anchor
Seen in gas turbine engine descriptions, especially when explaining how air and fuel are burned to produce engine power.
Derivation
From the Latin combustio, meaning 'burning up.' The aviation meaning stays close to the original — combustion is simply controlled burning harnessed to do work.
Why Pilots Care
Understanding combustion helps pilots recognize how fuel flow, temperature limits, and engine performance are directly linked during all phases of flight.
Analogy
Think of a gas stove burner: useful combustion is a controlled, steady flame, not a sudden blast.
Grounding Statement
In a turbine engine, air and fuel keep burning as a steady flame while air flows through the engine.
Intuition Check
Combustion does not mean an uncontrolled explosion here. In an aircraft engine, it means controlled burning that produces usable heat and power.
Example Sentence 1
In a gas turbine engine, combustion happens continuously inside the combustion chamber rather than in timed pulses.
Example Sentence 2
A lean fuel-air mixture can weaken combustion and reduce engine power output.