On the structure and response of aerodynamically-strained planar premixed flames

摘要: The effects of aerodynamic straining on the structure and response adiabatic, unrestrained, equidiffusive, planar premixed flames were experimentally computationally studied via counterflow, twinflame configuration formed by oppositely-directed identical jets nitrogendiluted, near-stoichiometric methandair mixtures. Experimentally, doc i ty , temperature major species concentration profiles determined using LDV spontaneous Raman scattering as functions applied strain rate. Computationally, experimental situation was simulated with detailed reaction mechanisms transport properties. Both computational results show that flame remains similar in to variations rate long is sufficiently far away from stagnation surface so incomplete minimal. These substantiate concepts structure, thereby f lme thickness, are invariant for diffusionally-neutral complete reaction, these cannot be extinguished alone. computed further shown agree well quantitatively data, hence supporting usefulness model simulation strained flames. Implications present findings extinction stretched flames, modelling turbulent through concept laminar flamelets, stabilization blowoff, discussed. d Introduction under influence stretch have attracted much attention because not only most practical stretched, but a effort modeling also based * Graduate Student ** Professor, Fellow AIAA Copyright