Numerical study of a flame in a Karman vortex street

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(82)90105-5· OSTI ID:6522706

Karasalo, I ^[1]; Namer, I ^[2]

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1. California, University, Berkeley, CA
2. Drexel University, Philadelphia, PA

A numerical study of a simplified flow configuration modeling the interaction of a premixed laminar flame with a Karman vortex street is presented. The flow is assumed to be two dimensional, inviscid everywhere except inside the vortices, and incompressible everywhere except at the flame. The flame is modeled as a single layer source for the velocity potential with a burning speed which depends on the local curvature. Complete flow fields are calculated as a function of time for various values of the Markstein parameter, vortex shedding frequency, separation of the vortex street, the strength of the vortices, and the ratio of unburned to burned fluid densities, rho(u)/rho(b). The velocity far upstream was set at 60 cm/s for all cases. The essential features of the interaction of a flame with a vortex street are demonstrated, including the deflection of the vortex street and streamlines ahead of the flame and the development of a flame brush. The results of the calculations show that predictions of the flame behavior are strongly dependent on the value of rho(u)/rho(b). It was also found that the frequency of the vortex street, the phase relations as the vortices pass through the flame, and the strength of the vortices are important parameters in determining the behavior of the flame.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6522706
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 47; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
FLAME PROPAGATION
FLOW RATE
FLUID FLOW
IDEAL FLOW
KINETICS
LAMINAR FLOW
MATHEMATICAL MODELS
MATHEMATICS
NUMERICAL ANALYSIS
REACTION KINETICS
VORTEX FLOW
VORTICES