Chapter 5 (Mattingly) By: Ehsan Roohi

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Presentation transcript:

Chapter 5 (Mattingly) By: Ehsan Roohi Advanced Propulsion Chapter 5 (Mattingly) By: Ehsan Roohi

Topic Brayton Cycle Parametric Cycle Analysis Ramjet Turbojet Turbofan

Brayton Cycle Two Turbines Reheat Regenerator

Brayton Cycle

Analysis Parametric cycle analysis is also called design point analysis or on-design analysis because each plotted engine is operating at its so-called design point. The main objective of parametric cycle analysis is to relate the engine performance parameters (primarily thrust F and thrust specific fuel consumption S) to design choices (compressor pressure ratio, fan pressure ratio, bypass ratio, etc.), to design limitations (burner exit temperature, compressor exit pressure, etc.), and to flight environment (Mach number, ambient temperature, etc.).

Definitions

Design Steps 1) Thrust

Design Steps Free stream, diffuser , compressor, burner, turbine, after burner, nozzle

Design Steps

1 2 3

4 5: Combustions 7 9

Summary

Ideal Turbojet

Optimum Compressor Pressure Ratio

Ideal Turbojet with Afterburner

http://www.jsmatt.com/custom1.html Download: PARA V4.0 HW (Ch. 5): 6, 16, SM5.4