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Experimental and Numerical Study of High-Altitude Ignition of a Turbojet Combustor

Garcia Rosa, Nicolas and Linassier, Guillaume and Lecourt, Renaud and Villedieu, Philippe and Lavergne, Gérard Experimental and Numerical Study of High-Altitude Ignition of a Turbojet Combustor. (2011) Heat Transfer Engineering, 32 (11-12). 949-956. ISSN 0145-7632

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Official URL: http://dx.doi.org/10.1080/01457632.2011.556377

Abstract

This paper aims at contributing to the methodology used for the numerical prediction of ignition inside a combustion chamber. For this purpose, experiments are carried out in a model combustor with improved optical access. Laser tomography and high-speed video give a first insight of the unsteady airflow and the flame structure. Laser Doppler Anemometry is used to measure the gas flow velocity field, and the non-reactive two-phase flow is studied in detail using Particle Doppler Analysis. The velocity field of the burning spray is measured using Particle Image Velocimetry. Ignition tests are performed to evaluate the minimum global equivalence ratio. This in-depth database is used to validate RANS simulations conducted in parallel using ONERA CFD code CEDRE. The numerical model for transient, spherical kernel ignition, proposed in previous work, has been improved and fully implemented in CEDRE. A first parametric study on a basic configuration has been partially validated for gaseous, monodisperse and polydisperse two-phase mixtures, and gives a better understanding of the first stages of flame propagation. This model is then used in combination with CEDRE to estimate the ignition probability of given spark- plug positions in the model combustor.

Item Type:Article
Additional Information:Thanks to Taylor & Francis editor. The definitive version is available at http://www.tandfonline.com/doi/abs/10.1080/01457632.2011.556377
Audience (journal):Special issue journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
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Deposited By: Nicolás García Rosa
Deposited On:25 Apr 2017 14:28

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