CUED Publications database

Structure of igniting ethanol and n-heptane spray flames with and without swirl

Letty, C and Mastorakos, E and Masri, AR and Juddoo, M and O'Loughlin, W (2012) Structure of igniting ethanol and n-heptane spray flames with and without swirl. Experimental Thermal and Fluid Science, 43. pp. 47-54. ISSN 0894-1777

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Abstract

This paper explores the ignition and subsequent evolution of spray flames in a bluff-body configuration with and without swirl. Ethanol and n-heptane are used to compare the effects of volatility. Ignition is performed by a laser spark. High speed imaging of OH *-chemiluminescence and OH-PLIF collected at 5kHz are used to investigate the behaviour of the flames during the first stages of ignition and the stable flame structure following ignition. Swirl induces a wider and shorter flame, precession, and multiple reaction zones, while the non-swirling flames have a simpler structure. The reaction fronts seem thinner with ethanol than with heptane. The dataset can be used for model validation. © 2012 Elsevier Inc.

Item Type: Article
Uncontrolled Keywords: Fast-response OH-PLIF Laser ignition Spark ignition Spray flames Swirl
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:56
Last Modified: 08 Dec 2014 02:38
DOI: 10.1016/j.expthermflusci.2012.03.020