Academic Journal

Modelling challenges of volume-averaged combustion in inert porous media

التفاصيل البيبلوغرافية
العنوان: Modelling challenges of volume-averaged combustion in inert porous media
المؤلفون: Masset, Pierre-Alexandre, Duchaine, Florent, Pestre, Antoine, Selle, Laurent
المساهمون: Institut de mécanique des fluides de Toulouse (IMFT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS), European Project: 832248,SCIROCCO
المصدر: ISSN: 0010-2180 ; Combustion and Flame ; https://ut3-toulouseinp.hal.science/hal-04314480 ; Combustion and Flame, 2023, 251, pp.112678. ⟨10.1016/j.combustflame.2023.112678⟩.
بيانات النشر: HAL CCSD
Elsevier
سنة النشر: 2023
المجموعة: Université Toulouse III - Paul Sabatier: HAL-UPS
مصطلحات موضوعية: Porous media combustion, Volume-averaged model, Closure model, Flame wrinkling, Dispersion, porous media combustion volume-averaged model closure model flame wrinkling dispersion, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
الوصف: International audience ; In porous burners, the flame thickness can be smaller than the pore size, resulting in sharp and locally-anchored flame fronts. The presence of such steep gradients at the pore level is a major hurdle for the derivation of volume-averaged models, particularly for the highly non-linear reaction rates. With the intent to address the difficulties associated with volume-averaging for porous media combustion, this work makes use of 3D Pore-Level Direct Numerical Simulations including conjugate heat transfer and complex chemistry in burners of finite length. These detailed 3D simulations are compared to their 1D volume-averaged counterpart, with effective properties estimated directly on the computational domains and of identical thermo-chemical scheme. Discrepancies in terms of burning rate, profiles, and a priori analysis on the reaction rates are discussed. Various pore sizes and geometries are considered. At the pore level, it is shown that preheating, wrinkling and wall quenching are the three main factors driving the global burning rate. Importantly, hydrodynamic dispersion is shown to have an indirect role on combustion processes. From the observations of combustion at pore scale, a new closure for reaction rates based on a flamelet assumption is proposed. It accounts for flame wrinkling and eliminates the unwanted effect of hydrodynamic dispersion on burning rate.
نوع الوثيقة: article in journal/newspaper
اللغة: English
Relation: info:eu-repo/grantAgreement//832248/EU/SCIROCCO/SCIROCCO
DOI: 10.1016/j.combustflame.2023.112678
الاتاحة: https://ut3-toulouseinp.hal.science/hal-04314480
https://ut3-toulouseinp.hal.science/hal-04314480v1/document
https://ut3-toulouseinp.hal.science/hal-04314480v1/file/1-s2.0-S0010218023000639-am-1.pdf
https://doi.org/10.1016/j.combustflame.2023.112678
Rights: info:eu-repo/semantics/OpenAccess
رقم الانضمام: edsbas.2CB0DB77
قاعدة البيانات: BASE
الوصف
DOI:10.1016/j.combustflame.2023.112678