Design of Turbine Blades in 2D — Lesson 3

This lesson covers the fundamental aspects of axial flow turbines, focusing on the design and operation of turbine blades. It delves into the two-dimensional and three-dimensional theories behind axial flow turbines, and the aerodynamic principles they operate on. The lesson also discusses the differences between axial flow turbine blades and axial flow compressors, and how the design of these blades is influenced by factors such as blade cooling, blade profiles, and the overall turbine blade structure. It further explains the importance of airfoils in the operation of turbines and compressors, and how different types of airfoils are used for different purposes. The lesson concludes with a discussion on the modern design techniques used in creating turbine blades, including the use of computational fluid dynamic techniques.

Video Highlights

07:21 - Explanation of the importance of blade design and axial flow turbine blade profiles.
17:50 - Discussion on the selection of design points and the parameters that need to be considered.
31:48 - Explanation of the importance of matching the turbine pressure ratio with the compressor pressure ratio.
53:22 - Discussion on the importance of blade loading and blade spacing in turbine design.

Key Takeaways

- Axial flow turbines operate based on aerodynamic principles and use airfoils as the fundamental building block.
- The design of axial flow turbine blades is influenced by factors such as blade cooling, blade profiles, and the overall turbine blade structure.
- Different types of airfoils are used for different purposes in turbines and compressors.
- Modern design techniques, including the use of computational fluid dynamic techniques, are used in creating turbine blades.
- The design of turbine blades involves a balance between achieving high efficiency and managing constraints such as stress levels and material limitations.