Centrifugal Compressors

This course covers the fundamental principles, theories, and design considerations of centrifugal compressors. It provides a deep dive into the thermodynamics of centrifugal compressors, explaining how energy is added in the impeller and how static pressure rise continues in the vaneless space and the diffuser. The course also discusses the different configurations of an impeller, the role of an inducer, and the process of diffusion in the vaneless space. It further explains the governing equations for centrifugal compressors and how one can analyze the flow through these machines. The course also covers the principles of turbomachinery aerodynamics, with a focus on axial flow turbo-machines, axial compressors, and axial turbines. It delves into the history of jet engines, explaining how centrifugal compressors were used in the earliest jet engines and how axial compressors gradually replaced them. The course concludes with a discussion on the performance characteristics of a centrifugal compressor, including the problems of choking, stall surge, and the effect of slip factor on its performance.