Application of a robust [beta]-pdf treatment to analysis of thermal NO formation in nonpremixed hydrogen-air flame

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(94)90176-7· OSTI ID:6913486

Chen, C S; Chang, K C ^[1]; Chen, J Y ^[2]

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1. National Cheng-Kung Univ., Tainan (Taiwan, Province of China). Inst. of Aeronautics and Astronautics
2. Univ. of California, Berkeley, CA (United States). Dept. of Mechanical Engineering

The assumed [beta]-pdf is widely used in turbulent flame simulation with the moment closure method. However, implementation of the [beta]-pdf in turbulent flame simulation may sometimes encounter singularity difficulties in numerical calculation. The study proposes a robust [beta]-pdf treatment to overcome these numerical difficulties. The proposed [beta]-pdf treatment associated with the partial equilibrium chemistry model and the k-[epsilon] turbulence model is firstly applied to the case of H[sub 2]/N[sub 2]-air nonpremixed flame to demonstrate its robustness. Then, the present method is applied to the study of thermal NO formation in H[sub 2]-air nonpremixed flames. Comparison of results shows the present model to be capable of yielding fair agreement with the measurements. It is competitive with other more sophisticated methods, such as the pdf evolution method and the conditional moment closure method.

• OSTI ID: 6913486
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 98:4; ISSN 0010-2180; ISSN CBFMAO
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
081000 -- Hydrogen-- Waste Management-- (1990-)
083000* -- Hydrogen-- Combustion-- (1990-)
CALCULATION METHODS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
COMBUSTION KINETICS
ELEMENTS
FLUID FLOW
HYDROGEN
KINETICS
MATHEMATICAL MODELS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PROBABILITY
REACTION KINETICS
TURBULENT FLOW
YIELDS