Investigation on weakly curved counterflow diffusion flames at infinitely fast chemistry

Combustion;Modeling;Counterflow diffusion flames

Vempati, Naga Saras Chandan ; Matalon ; Moshe

关键词: Combustion;    Modeling;    Counterflow diffusion flames;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/99404/VEMPATI-THESIS-2017.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

We investigate the behavior of a counterflow diffusion flame subject to a flow field comprising of a first order potential flow superimposed on a weak second order correction to the potential flow. An Arrhenius one-step irreversible reaction model at infinite Damkohler number and constant density is considered. This simplified model is then used to study the distribution of fuel and oxidizer mass fractions, shape of the reaction sheet, and the temperature field. The temperature of the reaction sheet for the unity Lewis numbers is constant and is shown to be equal to the adiabatic flame temperature. The temperature of the reaction for the unequal Lewis number case is also shown to be constant and is equal to the stoichiometric flame temperature. In addition, we also show that the reaction sheet always takes the shape of the seperatrix, independent of fuel-oxidizers Lewis numbers and mixture strength.