What is the main function of the combustor system in a gas turbine?

The main function of the combustor system in a gas turbine is to ignite the air-fuel mixture. This process is crucial because it generates the high-temperature, high-pressure gases that are needed to drive the turbine and produce thrust or mechanical power. Within the combustor, air is mixed with fuel, and then an ignition source initiates combustion. As the fuel burns, it expands rapidly, creating hot gases that then flow into the turbine section.

The effective design and operation of the combustor is vital for the overall efficiency and performance of the gas turbine, as it influences combustion stability, emissions, and efficiency. The other functions related to a gas turbine, such as compressing air or releasing exhaust gases, are performed in other parts of the gas turbine system—namely, the compressor and the exhaust section respectively. Understanding the primary role of the combustor helps in comprehending the entire operation sequence of a gas turbine engine.