Compressible Flows And Propulsion Systems

Données Générales
Programme Académique	ECAM LaSalle Mechanical and Electrical Engineering Programme			Responsable(s) Module : AHMAD Hafiz Muhammad,MAJDOUB Fida
Type d'EC : Cours	Compressible Flows And Propulsion Systems (LIIEEng07ECompFlowPropSystMecha)
TD : 12h00 Cours : 12h00 Travail personnel : 36h00 Durée totale: 70h00	Statut	Periode Semester 7	Langue d'enseignement : English

Objectifs Généraux
1. Acquire solid knowledge on the different jet propulsion-related technologies applied to various types of vehicles. 2. Ability to use an isentropic model for nozzle design (convergent and convergent-divergent nozzles). 3. Ability to apply a thermodynamic approach to analyze the behavior and performance of propulsion systems based on air-breathing turbomachines (turbojets and turbofans) and rocket propulsion systems.

Objectifs Généraux

1. Acquire solid knowledge on the different jet propulsion-related technologies applied to various types of vehicles.
2. Ability to use an isentropic model for nozzle design (convergent and convergent-divergent nozzles).
3. Ability to apply a thermodynamic approach to analyze the behavior and performance of propulsion systems based on air-breathing turbomachines (turbojets and turbofans) and rocket propulsion systems.

Contenu
• Jet propulsion systems and their performance criteria applied to Air-Breathing and Rocket engines: Thrust; Specific Impulse; Propulsion efficiency; Tsiolkovsky rocket equation; Breguet aircraft equation. • Fundamental of Compressible flows: Mach number and thermodynamics of compressible flows; Shockwaves; Conservation laws; application to Isentropic flows. • Rocket engine design: Stagnation and critical states; operating mode of nozzles in rocket engines; influence of combustion pressure and temperature and of nozzle geometry on the thrust finally produced. Calculation of the resulting specific impulse. • Propulsion systems combustion processes: influence of fuel composition and of Air-Fuel Ratio on the performance of air-breathing combustion processes; use of liquid and solid propellants in rocket engine combustion processes. • Air-breathing propulsion turbomachines: Thermodynamic cycles used in turbojet or turbofans engines; influence of pressure ratios, air and fuel mass flow rates, blades geometries on the engine performances (specific impulse, propulsion efficiency and specific fuel consumption).

Contenu

• Jet propulsion systems and their performance criteria applied to Air-Breathing and Rocket engines: Thrust; Specific Impulse; Propulsion efficiency; Tsiolkovsky rocket equation; Breguet aircraft equation.
• Fundamental of Compressible flows: Mach number and thermodynamics of compressible flows; Shockwaves; Conservation laws; application to Isentropic flows.
• Rocket engine design: Stagnation and critical states; operating mode of nozzles in rocket engines; influence of combustion pressure and temperature and of nozzle geometry on the thrust finally produced. Calculation of the resulting specific impulse.
• Propulsion systems combustion processes: influence of fuel composition and of Air-Fuel Ratio on the performance of air-breathing combustion processes; use of liquid and solid propellants in rocket engine combustion processes.
• Air-breathing propulsion turbomachines: Thermodynamic cycles used in turbojet or turbofans engines; influence of pressure ratios, air and fuel mass flow rates, blades geometries on the engine performances (specific impulse, propulsion efficiency and specific fuel consumption).

Prérequis
IBENG-1-MATHS-S1, IBENG-1-MATHS-S2, IBENG-2-MATHS-S3, IBENG-2-FLUID-S3, IBENG-2-FLUID-S4, IBENG-1-THERM-S2

Bibliographie
• J. D. Anderson Jr., Modern Compressible Flow with Historical Perspective, 3rd edition, McGraw-Hill, 2003. • E. A. Baskharone, Principles of Turbomachinery in Air-Breathing Engines, Cambridge University Press, 2006. • G. P. Sutton & O. Biblarz, Rocket Propulsion Elements, 9th edition, Wiley, 2017.

Évaluation(s)
N°	Nature	Coefficient	Objectifs
1	Understanding about propulsion systems and Shock wave phenomenon Ability to solve isentropic flow in conduits.	50	In this exam following topic will be analyzed: 1. Propulsion systems 2. Governing equations for flow induced by disturbance 3. Fundamentals of Compressible flow (Sonic, sub-sonic and super-sonic) through nozzles
2	Ability to calculate the Heat of reaction/AFR/LHV and stoichiometric ratios of air-breathing and rocket engines by writing balanced chemical combustion equations. Solving complex cases of gas turbines, turbojets (ideal/actual), turboprop, and ramjet engines.	50	In this exam, the following topic will be analyzed: 1. Combustion in air breathing engines 2. Combustion in rocket engines 3. Jet engines But we may need to apply the concepts learned in first half of the course.