Which are the two most common fuel nozzles used in turbine engines?

The two most common fuel nozzles used in turbine engines are simplex and duplex nozzles. Simplex nozzles are designed to deliver fuel in a single stream and are often used in systems where the fuel pressure is adequate to atomize the fuel effectively on its own without additional assistance. The design simplicity of simplex nozzles contributes to their reliability and ease of maintenance.

Duplex nozzles, on the other hand, incorporate both a primary and secondary fuel delivery system. This design allows for improved fuel atomization, as the primary nozzle sprays fuel into the combustion chamber while the secondary nozzle can introduce more fuel if needed, depending on the engine's operating conditions. This dual approach is beneficial for optimizing performance across various engine loads and ensures a more efficient combustion process.

The selection of simplex or duplex nozzles in turbine engines is informed by factors such as performance requirements, operational flexibility, and efficiency in fuel utilization. Understanding the differences between these nozzle types is crucial for those working with turbine engines, as they directly affect engine performance and emissions.