Study of Erosion Phenomenon in the CFM56-7B Turbojet

Abstract

Since the early days of aviation, the man has not stopped looking for better performance to improve the reliability of the reactor during operation. This means that it must be free all possible defects (choice of materials, choice of treatment, and choice of implementation ...).he replacement cost in him even but also the potential damage caused with the environment and the threat with the life of the human beings.

Indeed, the design of turbo machinery, complex organs, which must withstand mechanical vibration, thermal and respond to heavy exploitation. These are the fins that determine the performance of the engine. They are subject to erosion, which is a surface phenomenon associated with the removal of material caused by repeated impact with solid particles of the material. This depends on the shape, the mass, the particle velocity, hardness and toughness.

The objective of this work focuses on the characterization and identification of damage mechanisms operating in facies wear fins HP CFM56-7B engine using non destructive testing is the method of X ray. The characterization showed a fretting wear located in the upper part of the fin that increases from the 6th to the 9th stage.