Development of simple and high-performance technology for compressors

Abstract

To reduce the direct operating costs of environmentally compatible engines for small aircraft, highly loaded aerodynamic design technology was developed for the compressor, which could reduce the number of stages considerably while maintaining performance. Three dimensional aerodynamic design was employed using Computational Fluid Dynamics, and the target pressure ratio was obtained from performance rig tests. Diffuser Passage Compressor technology was introduced to suppress tip clearance leakage flows and expand the operating range of small compressors. Effectiveness was demonstrated by low-speed model tests. Linear friction welding and Micro Spark Coating technologies were developed to realize low cost and simple production of the compressor blisks, a term for integrated bladed disks.