Qualification Approach of a High-Pressure Compressor Drum of a Military Turbofan Engine for Structural Integrity and Life

Abstract

A multistage high-pressure compressor drum has been designed for a low bypass military turbofan engine. The complex mission profile of the engine with high throttle excursion demands reliable operation of the compressor throughout the flight envelope maintaining structural integrity. Therefore, qualification of the compressor drum for a fighter class engine is a challenge from the airworthiness point of view. This paper presents the methodology adopted and various stages of qualification, standards followed, and results based on which clearance has been accorded for fitment in engine and engine on aircraft. The compressors thus fitted in engine have exhibited satisfactory performance and are at different stages in service.