2D Analytical Model of a Compressor — Lesson 3

This lesson covers the fundamentals of turbomachinery aerodynamics, focusing on the analysis of compression systems and the construction of velocity triangles. It delves into the calculation of work required for compression processes and the estimation of pressure ratios. The lesson also discusses the derivation of an expression for pressure ratio in terms of temperature rise and efficiency. It further explores the design parameters of a compression system, including flow coefficient, stage loading coefficient, degree of reaction, and diffusion factor. The lesson concludes with a discussion on cascade aerodynamics, explaining the concept of a cascade, its significance in the design process, and the parameters involved in cascade testing.

Video Highlights

01:56 - Introduction to the concept of cascade aerodynamics and its significance in the design process.
11:38 - Explanation of the concept of degree of reaction, stage efficiency and how it is calculated.
37:33 - Discussion on the concept of diffusion factor and its significance in blade design.
44:54 - Discussion on the parameters measured in a cascade and the significance of these measurements.

Key Takeaways

- The lesson provides an in-depth understanding of compression systems, including the calculation of work required and the estimation of pressure ratios.
- It introduces key design parameters of a compression system, such as flow coefficient, stage loading coefficient, degree of reaction, and diffusion factor.
- The lesson explains the concept of a cascade, its significance in the design process, and the parameters involved in cascade testing.
- It emphasizes the importance of minimizing incidence and deflection angles in compressor design to prevent performance penalties.
- The lesson also highlights the role of cascade testing in generating detailed measurements on compressor blades.