Measurements and modeling of a bluff body stabilized flame

Journal Article · Fri May 01 00:00:00 EDT 1992 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(92)90028-N· OSTI ID:5224682

Correa, S M; Gulati, A ^[1]

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1. General Electric Research Center, Schenectady, NY (US)

This paper reports on an axisymmetric bluff body stabilized nonpremixed turbulent flame of 27.5% CO/32.3% H{sub 2}/40.2% N{sub 2}-in-air. The recirculation zone stabilized the flame and provided greater strain rates than possible in jet or even piloted-jet flames. Major species, density, and temperature were measured using a laser Raman scattering system, which was modified to operate in a chemiluminescent environment. The computational model was based on partial equilibrium in the radical pool, an assumed shape pdf over the two thermochemical variables required, and the k-{epsilon} turbulence model for closure of the density-weighted averaged Navier Stokes equations. The equations were solved in the elliptic form appropriate to recirculating flow. Enough grid was added to reduce the transverse cell Reynolds numbers to below two, ensuring second-order accurate and stable discretization of convection operators and so eliminating artificial diffusion. Mean properties such as density were obtained at each node by convolution with the joint pdf over the two thermochemical scalars. The k-{epsilon} turbulence model gave too rapid an initial decay. agreement was encouraging on mixture fraction mean and variance, temperature, and species concentration fields.

• OSTI ID: 5224682
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 89:2; ISSN 0010-2180; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMILUMINESCENCE
DIFFERENTIAL EQUATIONS
ELEMENTS
EQUATIONS
EQUILIBRIUM
FLAMES
FLUID FLOW
FLUIDS
GASES
HYDROGEN
JETS
LASER SPECTROSCOPY
LUMINESCENCE
MATHEMATICAL MODELS
NAVIER-STOKES EQUATIONS
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTIAL DIFFERENTIAL EQUATIONS
RAMAN EFFECT
SPECTROSCOPY
STABILIZATION
SYMMETRY
TEMPERATURE MEASUREMENT
THERMODYNAMICS
TURBULENCE
TURBULENT FLOW