Journal article
Mechanisms of flame stabilisation at low lifted height in a turbulent lifted slot-jet flame
S Karami, ER Hawkes, M Talei, JH Chen
Journal of Fluid Mechanics | Published : 2015
DOI: 10.1017/jfm.2015.334
Abstract
A turbulent lifted slot-jet flame is studied using direct numerical simulation (DNS). A one-step chemistry model is employed with a mixture-fraction-dependent activation energy which can reproduce qualitatively the dependence of the laminar burning rate on the equivalence ratio that is typical of hydrocarbon fuels. The basic structure of the flame base is first examined and discussed in the context of earlier experimental studies of lifted flames. Several features previously observed in experiments are noted and clarified. Some other unobserved features are also noted. Comparison with previous DNS modelling of hydrogen flames reveals significant structural differences. The statistics of flow..
View full abstractGrants
Awarded by US Department of Energy
Funding Acknowledgements
This work was supported by the Australian Research Council. The research benefited from computational resources provided through the National Computational Merit Allocation Scheme, supported by the Australian Government. The computational facilities supporting this project included the Australian NCI National Facility, the partner share of the NCI facility provided by Intersect Australia Pty Ltd, the Peak Computing Facility of the Victorian Life Sciences Computation Initiative (VLSCI), iVEC (Western Australia) and the UNSW Faculty of Engineering. This research was sponsored by the US Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences. Sandia National Laboratories is a multi-programme laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the US Department of Energy under Contract DE-AC04-94-AL85000. We acknowledge the support of the Stanford Centre for Turbulence Research during the 2014 CTR Summer Program. We also warmly thank H. Yu of the University of Nebraska-Lincoln for generating the 3D volume rendering in this work.