Numerical and experimental investigation of vortical flow-flame interaction

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Description

A massively parallel coupled Eulerian-Lagrangian low Mach number reacting flow code is developed and used to study the structure and dynamics of a forced planar buoyant jet flame in two dimensions. The numerical construction uses a finite difference scheme with adaptive mesh refinement for solving the scalar conservation equations, and the vortex method for the momentum equations, with the necessary coupling terms. The numerical model construction is presented, along with computational issues regarding the parallel implementation. An experimental acoustically forced planar jet burner apparatus is also developed and used to study the velocity and scalar fields in this flow, and ... continued below

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152 p.

Creation Information

Najm, H.N.; Schefer, R.W.; Milne, R.B.; Mueller, C.J.; Devine, K.D. & Kempka, S.N. February 1, 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Livermore, CA (United States)
    Place of Publication: Livermore, California

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Description

A massively parallel coupled Eulerian-Lagrangian low Mach number reacting flow code is developed and used to study the structure and dynamics of a forced planar buoyant jet flame in two dimensions. The numerical construction uses a finite difference scheme with adaptive mesh refinement for solving the scalar conservation equations, and the vortex method for the momentum equations, with the necessary coupling terms. The numerical model construction is presented, along with computational issues regarding the parallel implementation. An experimental acoustically forced planar jet burner apparatus is also developed and used to study the velocity and scalar fields in this flow, and to provide useful data for validation of the computed jet. Burner design and laser diagnostic details are discussed, along with the measured laboratory jet flame dynamics. The computed reacting jet flow is also presented, with focus on both large-scale outer buoyant structures and the lifted flame stabilization dynamics. A triple flame structure is observed at the flame base in the computed flow, as is theoretically expected, but was not observable with present diagnostic techniques in the laboratory flame. Computed and experimental results are compared, along with implications for model improvements.

Physical Description

152 p.

Notes

OSTI as DE98052586

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  • Other Information: PBD: Feb 1998

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  • Other: DE98052586
  • Report No.: SAND--98-8232
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/653948 | External Link
  • Office of Scientific & Technical Information Report Number: 653948
  • Archival Resource Key: ark:/67531/metadc703859

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  • February 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 12, 2016, 8:19 p.m.

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Najm, H.N.; Schefer, R.W.; Milne, R.B.; Mueller, C.J.; Devine, K.D. & Kempka, S.N. Numerical and experimental investigation of vortical flow-flame interaction, report, February 1, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc703859/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.