What is the function of the stator vane assembly at the discharge end of a typical axial-flow compressor?

The function of the stator vane assembly at the discharge end of a typical axial-flow compressor is to straighten airflow to eliminate turbulence. This is essential because, as air moves through the compressor stages, it can become swirling or chaotic due to the rotational motion imparted by the rotor blades. The stator vanes are fixed components that align the exiting airflow, ensuring it exits in a more uniform and streamlined manner.

By straightening the airflow, the stator vanes help maintain efficient performance of the engine by minimizing losses due to turbulence, which can impact the compressor's overall efficiency and performance. This also aids in directing the airflow into the subsequent stages of the engine, ensuring optimal aerodynamic characteristics for further compression or combustion processes.

In contrast to options like increasing airflow velocity or reducing noise, the primary role of the stator vanes focuses on airflow management rather than making the air move faster or quieter. Supporting rotor blades is another structural aspect that pertains to the design of the compressor but does not describe the function of the stator vane assembly at the discharge end.