Tutorial — Centrifugal Compressors — Lesson 3

This lesson covers the fundamentals of turbo machinery aerodynamics, with a focus on centrifugal compressors. It delves into the thermodynamics of centrifugal compressors, their benefits, disadvantages, and applications. The lesson also explains the different components of a centrifugal compressor, such as the inlet part, the inducer, the impeller, and the diffuser. It further discusses the performance characteristics of centrifugal compressors, including the concept of choking and the impact of carioles acceleration. The lesson concludes with a tutorial session where the instructor solves problems related to centrifugal compressors, including calculating slip factors, Mach numbers, and impeller diameters.

Video Highlights

04:25 - Discussion on the performance characteristics of centrifugal compressors and the concept of choking.
06:22 - Problem-solving session: Calculation of maximum mass flow rate and blade angle at the inducer tip for a centrifugal compressor.
14:29 - Problem-solving session: Calculation of slip factor and absolute Mach number for a centrifugal compressor.
46:33 - Exercise problems for self-study and practice.

Key Takeaways

- Centrifugal compressors have certain benefits but also come with disadvantages, limiting their use in large-sized engines.
- The components of a centrifugal compressor include the inlet part, the inducer, the impeller, and the diffuser.
- The performance of centrifugal compressors can be affected by factors such as carioles acceleration and choking.
- The slip factor plays a crucial role in the performance of a centrifugal compressor, affecting the pressure rise.
- Solving problems related to centrifugal compressors requires a good understanding of velocity triangles and the physics behind them.