Numerical and experimental investigation of vortical flow-flame interaction

Technical Report · Sun Feb 01 04:00:00 EST 1998

DOI:https://doi.org/10.2172/653948· OSTI ID:653948

Najm, H N; Schefer, R W; Milne, R B; Mueller, C J ^[1]; Devine, K D; Kempka, S N ^[2]

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1. Sandia National Labs., Livermore, CA (United States)
2. Sandia National Labs., Albuquerque, NM (United States)

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.

• Research Organization: Sandia National Labs., Livermore, CA (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 653948
• Report Number(s): SAND--98-8232; ON: DE98052586
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
BURNERS
CHEMICAL SPILLS
FIRES
FLAMES
FLOW MODELS
FLOW VISUALIZATION
HAZARDOUS MATERIALS SPILLS
MORPHOLOGY
TURBULENT FLOW
TWO-DIMENSIONAL CALCULATIONS