Nous présentons les résultats de simulations numériques bidimentionnelles de structures cellulaires de détonations dans le cas où l'énergie chimique est libérée de manière non-monotone, selon un modèle simple comprenant deux étapes exothermiques successives. L'influence du taux de réaction chimique de la deuxième étape sur la structure cellulaire de détonation a été étudiée. Nos simulations sont les premières à reproduire une structure cellulaire de détonation constituée de deux réseaux de cellules de tailles très différentes où de petites cellules remplissent entièrement les plus grandes comme cela a été observé expérimentalement.
We present the results of numerical two-dimensional simulations of detonation cellular structures under non-monotonous heat release provided by a chemical reaction comprising two successive exothermic steps. The influence of the rate of the second step of chemical reaction on the detonation cellular structure has been investigated. Our simulations are the first that reproduce a cellular structure composed of two clearly distinct sets of cells with different characteristic sizes where fine cells completely fill up larger ones, as has been observed experimentally.
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Keywords: Reactive media, Detonation, Cellular structure
Vianney Guilly 1 ; Boris Khasainov 1 ; Henri-Noël Presles 1 ; Daniel Desbordes 1
@article{CRMECA_2006__334_11_679_0, author = {Vianney Guilly and Boris Khasainov and Henri-No\"el Presles and Daniel Desbordes}, title = {Simulation num\'erique des d\'etonations \`a double structure cellulaire}, journal = {Comptes Rendus. M\'ecanique}, pages = {679--685}, publisher = {Elsevier}, volume = {334}, number = {11}, year = {2006}, doi = {10.1016/j.crme.2006.05.002}, language = {fr}, }
TY - JOUR AU - Vianney Guilly AU - Boris Khasainov AU - Henri-Noël Presles AU - Daniel Desbordes TI - Simulation numérique des détonations à double structure cellulaire JO - Comptes Rendus. Mécanique PY - 2006 SP - 679 EP - 685 VL - 334 IS - 11 PB - Elsevier DO - 10.1016/j.crme.2006.05.002 LA - fr ID - CRMECA_2006__334_11_679_0 ER -
%0 Journal Article %A Vianney Guilly %A Boris Khasainov %A Henri-Noël Presles %A Daniel Desbordes %T Simulation numérique des détonations à double structure cellulaire %J Comptes Rendus. Mécanique %D 2006 %P 679-685 %V 334 %N 11 %I Elsevier %R 10.1016/j.crme.2006.05.002 %G fr %F CRMECA_2006__334_11_679_0
Vianney Guilly; Boris Khasainov; Henri-Noël Presles; Daniel Desbordes. Simulation numérique des détonations à double structure cellulaire. Comptes Rendus. Mécanique, Volume 334 (2006) no. 11, pp. 679-685. doi : 10.1016/j.crme.2006.05.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2006.05.002/
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