Combustion applied to turbojet engines
ECTS Credits : 4
Duration : 42 hours
Semester : S9
Person(s) in charge :
Guillaume Castanet, CNRS Researcher firstname.lastname@example.org
Olivier Penanhoat, SNECMA Engineer email@example.com
Keywords : Combustion, flames, turbojet engines, internal combustion engines, pollutant
Prerequisites : Fluid mechanics, thermal sciences, thermodynamics
Acquire knowledge on combustion and its industrial applications
This course gives an overview on combustion. It also aims at acquiring knowledge on certain aspects of specific industrial interest and practices that come with turbojet engines. It also includes an introduction to compressible highly energetic flows.
The program of the module is as follows :
4. Practical works - GC. Measure of the speed of propagation of a propane/air mixture ; stability of laminar flames partially pre-mixed ; case study : Bensen burner ; limits of use
5. C5 - GC. Combustion in two phase flow : modelling the combustion of an isolated drop ; different types of combustion in smog.
6. C6 - GC. Initial concepts of compressible flows : one dimension equations, example of flows : isentropic, Rayleigh and straight shock waves.
7. C7 - GC. Combustion waves : explosions, structure of an explosion, speed of a Chapman-Jouguet explosion
8. C8 - OP. Turbulent flow : Phenomenological approach and conservation equations Reynolds-Average Navier-Stokes. Closed-form expression for the average advancement rate. Solving chemical kinetics by table reading or reduced schematics.
9. C9,10 - OP. Turbulent diffusion pre-mixing flames : most common models, including those based on Probability Density Functions ; overview on RANS numeric methods, Large Eddy Simulation, Direct Numerical Simulations ; case study - turbojet engines
10. C11 - OP. Pollutant effluents from turbojet engines chambers :modelling the formation of NOX, CO, UHC and particles pollutants ; impact of the fuel's finer composition ; Low NOX chambers future technology
11. C12 - OP. Environmental aspects on air quality and glass effect, Well to Wing CO2 balance ; stakes of "drop in" alternative fuels : impact on ultra-small particles ; measure of pollutants.
The evaluation of the module is essentially done through a test at towards mid-course and a final test. Practical works, that lead to a report, also come into account.
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