Triple flame structure and diffusion flame stabilization

Veynante, D. and Vervisch, L. and Poinsot, T. and Liñán Martínez, Amable and Ruetsch, G. (1995). Triple flame structure and diffusion flame stabilization. In: "Studying Turbulence Using Numerical Simulation Databases - V, Proceedings of the 1994 Summer Program", Dec 1994, Stanford University, Stanford.

Description

Title: Triple flame structure and diffusion flame stabilization
Author/s:
  • Veynante, D.
  • Vervisch, L.
  • Poinsot, T.
  • Liñán Martínez, Amable
  • Ruetsch, G.
Item Type: Presentation at Congress or Conference (Article)
Event Title: Studying Turbulence Using Numerical Simulation Databases - V, Proceedings of the 1994 Summer Program
Event Dates: Dec 1994
Event Location: Stanford University, Stanford
Title of Book: Studying turbulence using numerical simulation databases. V : proceedings of the 1994 summer program
Date: 1995
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The stabilization of diffusion ñames is studied using asymptotic techniques and numerical tools. The configuration studied corresponda to parallel streams of cold oxidizer and fuel initially separated by a splitter píate. It is shown that stabilization of a diffusion flame may only occur in this situation by two processes. First, the flame may be stabilized behind the flame holder in the wake of the splitter píate. For this case, numerical simulations confirm scalings previously predicted by asymptotic analysis. Second, the flame may be lifted. In this case a triple flame is found at longer distanees downstream of the flame holder. The structure and propagation speed of this flame are studied by using an actively controlled numerical technique in which the triple flame is tracked in its own reference frame. It is then possible to investigate the triple flame structure and velocity. It is shown, as suggested from asymptotic analysis, that heat reléase may induce displacement speeds of the triple flame larger than the laminar flame speed corresponding to the stoichiometric conditions prevailing in the mixture approaching the triple flame. In addition to studying the characteristics of triple flames in a uniform flow, their re-sistance to turbulence is investigated by subjecting triple flames to different vortical configurations.

More information

Item ID: 1537
DC Identifier: http://oa.upm.es/1537/
OAI Identifier: oai:oa.upm.es:1537
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 18 Apr 2009
Last Modified: 20 Apr 2016 06:52
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