Aircraft Engine part1
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The document summarizes the basic working principles of aircraft engines. It discusses how engines provide mechanical power, bleed air, and thrust force. It describes the main types of aircraft engines as turbojet, turbofan, and turboprop. It then explains the basic Brayton cycle that all gas turbine engines follow - pressurization through compressors, adding heat through combustors, and expansion through turbines to produce thrust. It focuses on the pressurization stage, describing how compressors increase the pressure and density of the airflow entering the engine core. Most modern civil aircraft engines are high-bypass turbofans.
Aircraft Engine part1
- 1. How Does Engine Work ? Part one
- 2. Why do we need Engines ? ●Mechanical Power. ●Bleed air. ●Thrust force.
- 3. Aircraft Engines Types ●Turbojet ●Turbfan ●Turboprop
- 5. Working Cycle The principles of Engine are the same whatever old or very modern engine. Pressurization. Adding Heat. Expansion.
- 7. Pressurization ●Here the engine does work on gas " air flow " ●It converts the kinetic energy " Velocity " into pressure energy " static pressure". ●Also , the wok of compressor increases the total pressure of flow. ●Compressors in this stag are to be assumed adiabatic. ●Most of civil aircraft compressors are axial compressors.
- 8. Pressurization Cont'd ●Now most of airplanes engines are turbofan because of its efficiency in this flight regime for civil big airplanes. ●The airflow is to be pressurized due to ram effect and this is done by intake. ●Then it passes through fan which is the major part for thrust. ●After this , flow is to be divided according to bypass ratio=Fan secondary flow / core primary flow by passing over splitter
- 9. Pressurization Cont'd ●The air flow is to be compressed over two stages of compressors. ●Low pressure compressor and High pressure compressor. ●The reason of using two compressors is to avoid stall or surge during starting the engine. ●Now there is three spool (compressors) working engines such as Trent series.
- 10. 800 Trent
- 11. Combustors ●Types of Combustion chambers ●Annular
- 13. Combustors Cont'd ●Can Annular
- 14. Combustors Cont'd The benefits of can combustor is maintainability. But the disadvantage is that if one can is to stop working properly during flight how much the damage will be on turbine blade because of change of temeprature.