What happens in the combustor of a gas turbine engine?

In the combustor of a gas turbine engine, the primary function is to mix fuel with compressed air and ignite this mixture. This process is essential for generating the high-temperature and high-pressure gas that drives the turbine.

When the combustion process occurs, the fuel (typically aviation kerosene or natural gas) is injected into the combustor, where it mixes thoroughly with the compressed air brought in from the compressor stage of the engine. Upon ignition, the fuel burns, resulting in an exothermic reaction that releases significant amounts of thermal energy. This increase in temperature and pressure transforms the combustion gases into a high-energy exhaust flow that moves through the turbine section of the engine, providing the mechanical energy required for propulsion.

The combustor, therefore, plays a critical role in providing the necessary conditions for achieving effective combustion, contributing to the overall efficiency and performance of the gas turbine engine.