Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL STUDY OF THE INFLUENCE OF THE SWIRL NUMBER ON LEAN PREMIXED COMBUSTION REGIMES
Submission Author:
Luís Fernando Figueira da Silva , RJ , Brazil
Co-Authors:
Letícia Piton, Gabriela Senra Pessanha Rios Nobrega, Luís Fernando Figueira da Silva, scouflaire philippe, Nasser Darabiha
Presenter: Letícia Piton
doi://10.26678/ABCM.ENCIT2018.CIT18-0143
Abstract
Lean premixed turbulent swirling combustion is known for significantly reducing pollutants emissions, when compared to non-premixed turbulent flames. Characterizing the swirl number influence is therefore essential to comparing different combustion chamber operational regimes. The present study is devoted to the experimental characterization of a new family of swirlers currently being developed in a partnership between PUC-Rio and EM2C/CNRS laboratory at CentraleSupelec. The associated combustion process is found to exhibit different flame topologies, or combustion regimes, which are functions of the mixture equivalence ratio and flow rate. The flame topologies and the boundaries between the observed combustion regimes are evidenced by means of OH$^*$ chemiluminescence and overall flame chemiluminescence.
Keywords
Experimental Study, swirling flows, Premixed turbulent flames, flame topology
