The University of Southampton
University of Southampton Institutional Repository

A DNS study on the stabilization mechanism of a turbulent lifted ethylene jet flame in highly-heated coflow

Yoo, Chun Sang, Richardson, Edward S., Sankaran, Ramanan and Chen, Jacqueline H. (2011) A DNS study on the stabilization mechanism of a turbulent lifted ethylene jet flame in highly-heated coflow Proceedings of the Combustion Institute, 33, (1), pp. 1619-1627. (doi:10.1016/j.proci.2010.06.147).

Record type: Article


Direct numerical simulation (DNS) of the near-field of a three-dimensional spatially-developing turbulent ethylene jet flame in highly-heated coflow is performed with a reduced mechanism to determine the stabilization mechanism. The DNS was performed at a jet Reynolds number of 10,000 with over 1.29 billion grid points. The results show that auto-ignition in a fuel-lean mixture at the flame base is the main source of stabilization of the lifted jet flame. The Damko¨ hler number and chemical explosive mode (CEM) analysis also verify that auto-ignition occurs at the flame base. In addition to auto-ignition, Lagrangian tracking of the flame base reveals the passage of large-scale flow structures and their correlation with the fluctuations of the flame base similar to a previous study (Yoo et al., J. Fluid Mech. 640 (2009) 53–481) with hydrogen/air jet flames. It is also observed that the present lifted flame base exhibits a cyclic ‘saw-tooth’ shaped movement marked by rapid movement upstream and slower movement downstream.
This is a consequence of the lifted flame being stabilized by a balance between consecutive auto-ignition events in hot fuel-lean mixtures and convection induced by the high-speed jet and coflow velocities. This is confirmed by Lagrangian tracking of key variables including the flame-normal velocity, displacement speed, scalar dissipation rate, and mixture fraction at the stabilization point.

PDF Yoo_PROCI_2011.pdf - Version of Record
Restricted to Repository staff only
Download (799kB)

More information

e-pub ahead of print date: 2 October 2010
Published date: 2011
Keywords: direct numerical simulation (dns), auto-ignition, turbulent lifted flame, ethylene, reduced mechanism
Organisations: Engineering Science Unit


Local EPrints ID: 203171
ISSN: 1540-7489
PURE UUID: 093af16a-c910-4c75-9573-759287d53e11

Catalogue record

Date deposited: 14 Nov 2011 11:57
Last modified: 18 Jul 2017 11:09

Export record



Author: Chun Sang Yoo
Author: Ramanan Sankaran
Author: Jacqueline H. Chen

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.