Skip to Main content Skip to Navigation
Theses

Quasi-Monte Carlo computation of radiative heat transfer in coupled Large Eddy Simulation of a swirled premixed flame

Abstract : The prediction of wall fluxes is a significant aspect in the life cycle of combustors, since it allows to prevent eventual wall damages. Heat transfer from flame to the walls is driven, apart from convection, also by radiation of burnt gases inside the chamber. In order to correctly account for both convective and radiative contributions to wall fluxes, the simultaneous solution of the radiative transfer equation (RTE) and the governing equations for reactive flows is required. However, multi-physics simulations where MC methods are coupled to Large Eddy Simulation (LES), remain very costly. The purpose of this study is then to investigate improvements of MC methods, by using an alternative sampling mechanism for numerical integration usually referred to as Quasi-Monte Carlo (QMC) integration. In this study, QMC method is coupled to Large Eddy Simulation (LES) of a configuration where the radiation plays an important role: the methane-air flame investigated during the experimental campaign Oxytec. Coupled and non-coupled simulations are compared and their comparison with experimental data shows that thermal radiation has an impact on both flow and flame topology. Finally a good agreement is found between numerical wall fluxes and experimental conductive fluxes.
Document type :
Theses
Complete list of metadatas

Cited literature [205 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02385868
Contributor : Abes Star :  Contact
Submitted on : Friday, November 29, 2019 - 2:43:31 PM
Last modification on : Friday, July 3, 2020 - 9:28:04 AM

File

73841_PALLUOTTO_2019_diffusion...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02385868, version 2

Citation

Lorella Palluotto. Quasi-Monte Carlo computation of radiative heat transfer in coupled Large Eddy Simulation of a swirled premixed flame. Other. Université Paris-Saclay; Université libre de Bruxelles (1970-..), 2019. English. ⟨NNT : 2019SACLC034⟩. ⟨tel-02385868v2⟩

Share

Metrics

Record views

761

Files downloads

111