What does the blade profile of a turbine engine compressor blade refer to?

The blade profile of a turbine engine compressor blade refers specifically to the geometry and shape of the blade surface, particularly how it is designed to interact with the incoming airflow. This includes features such as the curvature and thickness of the blade at various points along its span.

While a cutout that reduces blade tip thickness can affect airflow and performance, the primary aspect that defines the "blade profile" is the curvature of the blade surface. The design of the blade profile is critical because it determines how efficiently the blade can compress the air, impact airflow patterns, and influence the energy transfer from the airflow to the rotating blades.

Understanding the blade profile is essential for optimizing compressor performance, as it plays a significant role in the efficiency and aerodynamic characteristics of the engine. Properly designed blade profiles enhance performance by reducing drag and improving aerodynamic efficiency, which is crucial for overall engine performance.