The formation of ignition centers before the front of spherical flame in hydrogen_air mixtures under intense initiation

31st International Conference on Equations of State for Matter

Petukhov, V.A.^1 ; Bublik, N.P.^1 ; Gusev, P.A.^1 ; Gutkin, L.D.^1 ; Solntsev, O.I.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^1

关键词: Critical energy;    Direct initiations;    Hydrogen-air mixture;    Initiation energy;    Reaction volume;    Spherical flames;    Spherical shape;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012082/pdf
DOI  :  10.1088/1742-6596/774/1/012082

来源: IOP

【 摘 要 】

Studied is the influence of volume of hydrogen-air mixture, its composition and energy of its initiation on the formation of ignition centers before the front of spherical flame. During the experiments the mixture was placed into thin rubber envelopes of spherical shape having the initial volume of 7 and 40 m3. The mixture was initiated in the center of the reaction volume by the energy which was several times less than the critical energy of direct initiation of detonation. With increasing the initial volume of the mixture with the identical composition, registered is a decrease of the initiation energy at which the ignition centers before the front of spherical flame are formed.