Introduction to Turbine Blade Cooling — Lesson 1

This lesson covers the fundamentals of turbine machinery aerodynamics, focusing on the importance of turbine blade cooling. It delves into the different types of turbines, with a particular emphasis on axial turbines. The lesson explores the basic thermodynamics principles and workings of axial turbines, two-dimensional flow and analysis in axial turbines, and the estimation of losses and efficiencies. It also discusses the 3D flows and 3D design of turbine blades. The lesson highlights the significance of turbine inlet temperature in the overall performance of the engine and the various methods employed in turbine blade cooling. It also touches upon the fundamentals of heat transfer, which are essential for understanding turbine blade flows.

Video Highlights

01:22 - Introduction to the topic of turbine blade cooling and its significance in the overall performance of the engine.
06:38 - Discussion on the boundary layer developing on the blade surface and its role in heat transfer.
18:25 - Temperature profiles for a turbine blade in stator and rotor.
22:08 - Overview of the fundamentals of heat transfer - conduction, convection and radiation.
39:15 - Discussion on laminar and turbulent boundary layer in forced convection.

Key Takeaways

- Understanding the basic working of axial turbines is crucial in turbine machinery aerodynamics.
- Turbine inlet temperature plays a significant role in the overall performance of the engine.
- Turbine blade cooling is a critical aspect of turbine operation, with various methods employed for effective cooling.
- The fundamentals of heat transfer are essential for a deeper understanding of turbine blade flows.
- The lesson also highlights the complexities involved in turbine blade cooling, including mechanical, aerodynamics, and thermodynamic complexities.