Modeling of Laminar Mono- and Bidisperse Liquid Oxygen/Hydrogen Spray Flames in the Counterflow Configuration
作者:
D. SCHLOTZ,
E. GUTHEIL,
期刊:
Combustion Science and Technology
(Taylor Available online 2000)
卷期:
Volume 158,
issue 1
页码: 195-210
ISSN:0010-2202
年代: 2000
DOI:10.1080/00102200008947334
出版商: Taylor & Francis Group
关键词: Cryogenic Combustion;Laminar Spray Flames;Counterflow Configuration;High Pressure Flames;Vaporization;Liquid Oxygen/Hydrogen
数据来源: Taylor
摘要:
A numerical investigation of structures of laminar liquid oxygen/hydrogen spray diffusion flames in the counterflow configuration is performed for high subcritical, cryogenic conditions. The dilute spray is modeled using Lagrangian equations; both mono- and bidisperse sprays are considered. The Eulerian formulation of the gas phase equations includes detailed transport and detailed chemical reactions which enables the investigation of both the inner flame structure and the extinction of these flames. The model includes transport coefficients for the gas phase for cryogenic temperatures and elevated pressure. Moreover, the formulation of thermodynamic equilibrium at the droplet surface includes both temperature and pressure dependence of the binary mixture, and it replaces the commonly used Raoult's law. The study presents parametric dependencies of the flame structure on equivalence ratio, strain rate, and dispersity of the spray. It appears that the Sauter mean diameter is a good approximation for describing the flame structure for the bidisperse spray flames at low strain.
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