Application of Turbines in Aircraft Engines — Lesson 1

This lesson covers the fundamental theories of axial flow turbines, focusing on their application in modern aircraft engines and land-based gas turbines. It explains the concept of multi-stage turbines, where more than one stage is lined up to supply sufficient power to the compressors. The lesson also discusses the criteria for adopting multi-staging and multi-spooling in modern axial flow turbines. It further elaborates on the importance of matching compressor and turbine spool by spool and the role of engine control systems in actual operation. The lesson concludes with a discussion on 3-D flow theories for turbine blade.

Video Highlights

01:01 - Introduction to multi-spooling and its difference from multi-staging.
05:35 - Explanation of how multi-staging and multi-spooling are decided based on the aggregate amount of shaft work that needs to be produced.
08:37 - Discussion on the need for multi-spooling in engines with split compressors.
28:06 - Explanation of how the flow track of a multi-stage turbine is designed.
39:19 - Explanation of how compressor-turbine matching is done in a multi-spool configuration.

Key Takeaways

- Axial flow turbines are used in modern aircraft engines and land-based gas turbines.
- Multi-stage turbines are used to supply sufficient power to the compressors.
- Multi-staging and multi-spooling are adopted based on certain criteria related to gas turbine parameters.
- Matching compressor and turbine spool by spool is crucial in the operation of turbines.
- Engine control systems play a significant role in the actual operation of turbines.
- 3-D flow theories are essential for understanding the operation of turbine blades.