Design and Verification for Dual-mode CDFS and High-Load Compressor with a Large Flow Regulation Range

This paper presents the design and verification of the dual-mode core driven fan stage(CDFS)and high-load compressor with a large flow regulation range. In view of the characteristics of large flow regulation range of the two modes and high average stage load coefficient, this paper investigates the design technology of the dual-mode high-efficiency compressor with a large flow regulation range and high-load compressor with an average stage load coefficient of 0.504. Building upon this research, the design of the dual-mode CDFS and four-stage compressor is completed, and three-dimensional numerical simulation of the two modes is carried out. Finally, performance experiment is conducted to verify the result of three-dimensional numerical simulation. The experiment results show that the compressor performance is improved for the whole working conditions by using the new design method, which realizes the complete fusion design of the CDFS and high-pressure compressor (HPC). The matching mechanism of stage characteristics of single and double bypass modes and the variation rule of different adjustment angles on performance are studied comprehensively. Furthermore, it effectively reduces the length and weight of compressor, and breaks through the key technologies such as high-load compressor with the average load factor of 0.504. These findings provide valuable data and a methodological foundation for the development of the next generation aeroengine.