In a turboshaft engine, what is the purpose of the combustor?

The purpose of the combustor in a turboshaft engine is to mix compressed air with fuel and ignite the mixture, producing a high-temperature, high-pressure gas stream. A turboshaft engine operates using a continuous combustion process. First, air is drawn into the engine and compressed by a compressor. This compressed air is then fed into the combustor, also known as the combustion chamber. Fuel is injected into the combustor, where it mixes with the compressed air. An igniter, similar to a spark plug, initiates the combustion process. Once ignited, the fuel-air mixture burns continuously, creating a very hot and rapidly expanding gas. This high-energy gas stream then flows through the turbine section of the engine, causing the turbine blades to rotate. The rotating turbine then drives both the compressor and the helicopter's rotor system via a series of shafts and gears. The combustor's design is critical for efficient and stable combustion, ensuring a continuous and reliable source of energy to power the helicopter.