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Title: Thermochemistry of combustion in lean mixtures of hydrogen and air

Abstract

In order to understand the phenomenon of combustion, it is necessary to understand how the coupled set of chemical reactions that describes the combustion process behaves. A set of chemical equations is modeled mathematically using finite rate kinetics and the usual non-Arrhenius expression for the rate constants. The set of chemical reactions considered is that describing the combustion of lean mixtures of hydrogen and air, including reactions involving ''third bodies'' or a ''bath gas''. A numerical integration routine is used to solve the set of stiff, coupled, ordinary, nonlinear differential equations that describe the combustion problem. The importance of each species and reaction is investigated by examining the relative reaction rates and species concentrations. Of the original set of eighteen reactions associated with the combustion of hydrogen in air, ten reactions are found to be unimportant in describing the overall combustion process. Details are given in terms of the chemical mechanisms of combustion as to why the ten reactions are unimportant. Numerical results from a one-dimensional combustion problem are presented as a means of verifying the validity of the simplified set of eight reactions even with the presence of spatial effects. These results are also compared to some experimental results.

Authors:
;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA); United International Engineering, Inc., Albuquerque, NM (USA)
OSTI Identifier:
6602545
Report Number(s):
SAND-86-2411C; CONF-870623-1
ON: DE87000570
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: 22. AIAA thermophysics conference, Honolulu, HI, USA, 8 Jun 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AIR; CHEMICAL REACTIONS; HYDROGEN; COMBUSTION; NUMERICAL SOLUTION; ELEMENTS; FLUIDS; GASES; NONMETALS; OXIDATION; THERMOCHEMICAL PROCESSES; 400800* - Combustion, Pyrolysis, & High-Temperature Chemistry

Citation Formats

Behr, V L, and Chou, D C. Thermochemistry of combustion in lean mixtures of hydrogen and air. United States: N. p., 1986. Web.
Behr, V L, & Chou, D C. Thermochemistry of combustion in lean mixtures of hydrogen and air. United States.
Behr, V L, and Chou, D C. 1986. "Thermochemistry of combustion in lean mixtures of hydrogen and air". United States.
@article{osti_6602545,
title = {Thermochemistry of combustion in lean mixtures of hydrogen and air},
author = {Behr, V L and Chou, D C},
abstractNote = {In order to understand the phenomenon of combustion, it is necessary to understand how the coupled set of chemical reactions that describes the combustion process behaves. A set of chemical equations is modeled mathematically using finite rate kinetics and the usual non-Arrhenius expression for the rate constants. The set of chemical reactions considered is that describing the combustion of lean mixtures of hydrogen and air, including reactions involving ''third bodies'' or a ''bath gas''. A numerical integration routine is used to solve the set of stiff, coupled, ordinary, nonlinear differential equations that describe the combustion problem. The importance of each species and reaction is investigated by examining the relative reaction rates and species concentrations. Of the original set of eighteen reactions associated with the combustion of hydrogen in air, ten reactions are found to be unimportant in describing the overall combustion process. Details are given in terms of the chemical mechanisms of combustion as to why the ten reactions are unimportant. Numerical results from a one-dimensional combustion problem are presented as a means of verifying the validity of the simplified set of eight reactions even with the presence of spatial effects. These results are also compared to some experimental results.},
doi = {},
url = {https://www.osti.gov/biblio/6602545}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {10}
}

Conference:
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