Steady State and Transient Simulation of Single Spool Turbojet Engine at High Rotational Speeds

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Mansouri, Hossein | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42662 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Mazaheri, Karim
Abstract:
In this research, steady state and transient performance of a single spool axial turbojet engine (without afterburner) is studied. Performance maps of main components such as; compressor, combustor and turbine are extracted from a similarity (geometry independent) approach.Then using nested loops method, steady state model of the turbojet engine is developed and using shaft dynamics and volume packing equations, transient model of the turbojet engine is analyzed. Steady state and transient simulations results of an engine are validated by experimental data and then effect of changes on input parameters such as; polar moment of inertia, Mach number, fuel heating value, pressure and temperature of invironment on steady state and transient performance of the engine are studied. In transient simulation of the engine, engine responses to linear, stepper and periodic scenarios of fuel flow variation with time are analyzed and finally overshoot and undershoot phenomena of the engine rotational speed and EGT at different conditions of performance are examined
Keywords:
Steady State ; Transition State ; Engine Performance ; Serial Nested Loops ; Turbojet ; Performance Simulation ; Off-Design Performance

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