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Journal of Porous Media
IF: 1.752 5-Year IF: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Print: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i9.60
pages 857-873

PYROLYSIS IN POROUS MEDIA: PART 2. NUMERICAL ANALYSIS AND COMPARISON TO EXPERIMENTS

Nicolas Gascoin
PRISME Laboratory, INSA-Centre Val de Loire, 88 boulevard Lahitolle, 18000 Bourges, France
Luigi Romagnosi
University of Orléans, Bourges, 18000, France and University of Rome, La Sapienza, Rome, 00184, Italy
Ivan Fedioun
ICARE-CNRS 1C avenue de la Recherche Scientifique, F-45071 Orleans cedex 2, France
Johan Steelant
ESTEC – European Space Research and Technology Centre Keplerlaan 1, 2200 AG Noordwijk ZH, The Netherlands
Guillaume Fau
PRISME Laboratory, INSA-Centre Val de Loire, 88 boulevard Lahitolle, 18000 Bourges, France
Marc Bouchez
MBDA-France, 18 rue Le Brix, 18000 Bourges, France

ABSTRACT

Only limited studies are available experimentally to investigate hydrocarbon fuel pyrolysis, which can be of practical interest for the active cooling of head-loaded components in aerospace vehicles such as combustors in rocket engines. The numerical simulation is an additional way to investigate the related phenomena (heat and mass transfer with chemistry). After a first-code validation with experiments based upon inert gases, the code is further extended toward permeation with reactive dodecane and a reasonable agreement is found. The experimental accuracy of the permeability's' determination is confirmed numerically to be within ±30%. Numerically it is shown that this accuracy is due to strong flow spatial heterogeneities. The border effect of the test cell is found to be related to the permeable medium thickness, whereas the temperature field is correlated to the reaction zone. Two different kinetic mechanisms are used to investigate the chemistry effect on the heat and mass transfer. They also provide a better analysis of the fuel pyrolysis and of the products' formation.


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