Simultaneous measurements of equivalence ratio and flame structure in multipoint injectors using PLIF

Mikaël Orain; Frédéric Grisch; Eric Jourdanneau; Bjorn Rossow; Christian Guin; Brigitte Trétout

doi:10.1016/j.crme.2009.06.019

Simultaneous measurements of equivalence ratio and flame structure in multipoint injectors using PLIF
[Mesures simultanées de richesse et de structure de flamme en sortie d'injecteur multipoint par PLIF]

Mikaël Orain ¹ ; Frédéric Grisch ¹ ; Eric Jourdanneau ¹ ; Bjorn Rossow ¹ ; Christian Guin ¹ ; Brigitte Trétout ¹

¹ Office national d'études et de recherches aérospatiales, chemin de la Hunière, 91761 Palaiseau cedex, France

Comptes Rendus. Mécanique, Combustion for aerospace propulsion, Volume 337 (2009) no. 6-7, pp. 373-384.

Résumé
Abstract

Des mesures PLIF-kérosène et PLIF-OH ont été réalisées en sortie d'injecteur multipoint pour différentes conditions de richesse, avec une température d'air entre 480 et 730 K, à des pressions jusqu'à 2.2 MPa. Des images instantanées des distributions spatiales de kérosène et du radical OH ont été enregistrées dans le foyer de combustion avec un bon rapport signal-à-bruit. Les résultats montrent qu'en fonction de la répartition entre les injecteurs pilote et principal, le front de flamme possède une structure simple ou double. Une bonne corrélation spatiale est observée entre les distributions de kérosène vapeur et la position du front de flamme. En particulier, aucune zone sans signal de fluorescence n'est observée entre le carburant et le front de flamme. Lorsque la température ou la pression augmente, l'évaporation du carburant s'améliore et la répartition spatiale de du radical OH devient plus homogène dans le foyer, suggérant une combustion partiellement distribuée.

Simultaneous measurements of PLIF-kerosene and PLIF-OH have been successfully performed in a multipoint injection system for various overall equivalence ratio, air inlet temperature between 480 and 730 K and pressure up to 2.2 MPa. Single shot 2D-maps of the spatial distribution of kerosene vapour and OH radical in the combustor have been recorded with good signal-to-noise ratio. Results show that depending on the split between the pilot and the main injectors, the flame front exhibits a single or a double structure. Good spatial correlation between the repartition of the kerosene vapour and the position of the flame front was observed; in particular, no “dark zone” is observed between the fuel and the flame front. As temperature and pressure increase, fuel evaporation improves and the spatial distribution of OH radical becomes more homogeneous in the combustor, suggesting a partially-distributed combustion.

Publié le : 2009-06-01

DOI : 10.1016/j.crme.2009.06.019

Keywords: Combustion, Planar laser-induced fluorescence, Aromatics, Kerosene–air combustion, Flame structure, High pressure
Mots-clés : Combustion, Imagerie de fluorescence induite par laser, Aromatiques, Combustion kérosène–air, Structure de flamme, Haute pression

Affiliations des auteurs :

Mikaël Orain ¹ ; Frédéric Grisch ¹ ; Eric Jourdanneau ¹ ; Bjorn Rossow ¹ ; Christian Guin ¹ ; Brigitte Trétout ¹

¹ Office national d'études et de recherches aérospatiales, chemin de la Hunière, 91761 Palaiseau cedex, France

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     author = {Mika\"el Orain and Fr\'ed\'eric Grisch and Eric Jourdanneau and Bjorn Rossow and Christian Guin and Brigitte Tr\'etout},
     title = {Simultaneous measurements of equivalence ratio and flame structure in multipoint injectors using {PLIF}},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {373--384},
     publisher = {Elsevier},
     volume = {337},
     number = {6-7},
     year = {2009},
     doi = {10.1016/j.crme.2009.06.019},
     language = {en},
}

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%A Bjorn Rossow
%A Christian Guin
%A Brigitte Trétout
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Mikaël Orain; Frédéric Grisch; Eric Jourdanneau; Bjorn Rossow; Christian Guin; Brigitte Trétout. Simultaneous measurements of equivalence ratio and flame structure in multipoint injectors using PLIF. Comptes Rendus. Mécanique, Combustion for aerospace propulsion, Volume 337 (2009) no. 6-7, pp. 373-384. doi : 10.1016/j.crme.2009.06.019. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2009.06.019/

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