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Watch out for the ozone !
titr_bullet.gif Auto-Ignition in Combustion Chambers Using Lean Premixer Prevaporizer

 VIDEO  asup8_stat.gif
Pressure measurement and triggering
of the auto-ignition alert
VIDEO
Diagram of the auto-ignition detection system


Fuel-burning engines generally produce nitrogen oxides (NOx) that can react with the ozone in the atmosphere.

Supersonic aircraft engines operate partly in the stratosphere at the level of the ozone layer. It is therefore essential to reduce emission of these gases.

Lean premixing combustion chambers LEXIQUE reduce NOx emissions by at least 80 percent. They will equip future supersonic aircraft. These combustion chambers, where the jet fuel is mixed with air then vaporised in the premixing duct, risk being destroyed by auto-ignition LEXIQUE. This phenomenon is studied on a test facility where alerts are detected by optical fibres connected to photocells LEXIQUE.



Scientific Experts
J. C. Bédot - Département Moyens Techniques de l'Énergétique (DMTE)
C. Guin - Département Énergétique Fondamentale et Appliquée (DEFA)



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