Science Pictures

A Two-Headed Annular Combustion Chamber to Reduce Emissions

copyright © Onera 2006 - Tous droits réservés
Part of a two-headed annular combustion chamber:
lattice structure and temperature (blue: colder, red: more hot)
Top: lean fuel mixture, bottom: excess of fuel
Computation with Onera's Cedre code, 450 000 cells
[DEFA]

This aeronautical combustion aera has been designed by Snecma and Onera to study new concepts of combustion chambers allowing a better control of the emissions of minor pollutants. The combustion chamber on this page focuses on nitrogen oxides reduction.

Authors: Daniel Gaffié, Raphaëlle Lécot
DEFA Research and Development Engineers

Temperature distribution within the combustion chamber
Two successive combustions followed by a quick dilution reduce significantly NOx emissions.

Oxygen concentration (blue: lower, red: higher)

Last Update: March 8, 2006 - © ONERA 2009 - Terms of use