What are the two main functional components of a centrifugal compressor?

The two main functional components of a centrifugal compressor are the impeller and the diffuser. The impeller is responsible for accelerating the air, increasing its velocity as it is drawn into the compressor. As the air moves through the impeller's blades, it gains both kinetic energy and pressure.

Once the air leaves the impeller, it enters the diffuser. The diffuser functions to decrease the velocity of the air while further converting kinetic energy into pressure. This change in speed and pressure is essential for the efficient functioning of the compressor and plays a crucial role in the overall performance of the engine.

Together, the impeller and diffuser work in tandem to compress the incoming air effectively, making them fundamental components in the operation of a centrifugal compressor. Understanding the roles of these components helps in grasping the principles of how gas turbine engines maintain optimal performance and efficiency.