What is one of the key functions of the fuel drainage system in the combustion chamber?

The fuel drainage system in the combustion chamber plays a crucial role in ensuring the efficiency and safety of gas turbine operations, particularly during the shutdown phase. Its primary function is to drain unburned fuel from the combustion chamber after the engine has been turned off. This is critical as it helps prevent fuel from accumulating within the combustion chamber, which could lead to potential hazards such as fuel leaks, fire risks upon restarting the engine, or carbon buildup that could impede proper functionality in subsequent operations.

By ensuring that any residual fuel is removed, the drainage system contributes to the overall reliability and longevity of the gas turbine engine. This function is especially important following a shutdown because it alleviates the risk of unburned fuel causing issues during subsequent engine starts.