A numerical study of the influence of radiation on turbulence in a 2D axisymmetric turbulent flame

Authors

  • Felipe Roman Centeno Universidade do Vale do Rio dos Sinos - UNISINOS
  • Elizaldo Domingues dos Santos
  • Cristiano Vitorino da Silva
  • Francis Henrique Ramos França

DOI:

https://doi.org/10.4013/ete.2015.112.01

Abstract

This paper presents a study of the influence of thermal radiation on turbulence in the simulation of a turbulent, non-premixed methane-air flame. In such a problem, two aspects need to be considered for a precise evaluation of the thermal radiation: the turbulence-radiation interactions (TRI), and the radiative properties of the participating species, which are treated here with the weighted-sum-of-gray-gases (WSGG) model based on recently obtained correlations from HITEMP2010 database. The chemical reactions rates were considered as the minimum values between the Arrhenius and Eddy Break-Up rates. A twostep global reaction mechanism was employed, while the turbulence modeling was considered via standard k–? model. The source terms of the energy equation consisted of the heat generated in the chemical reaction rates as well as in the radiation exchanges. The discrete ordinates method (DOM) was employed to solve the radiative transfer equation (RTE), including the TRI. Comparisons of simulations with/without radiation demonstrated that radiation influenced turbulent-properties (root mean square of velocity and temperature fluctuations, and turbulent kinetic energy of the velocity fluctuations). Radiation smoothed turbulent-properties fields. The influence of radiation was more important on the temperature fluctuations than on the velocity fluctuations.

Keywords: thermal radiation, turbulence, TRI, CFD, non-premixed flame.

Author Biography

Felipe Roman Centeno, Universidade do Vale do Rio dos Sinos - UNISINOS

Possui graduação em Engenharia Mecânica pela Universidade Federal do Rio Grande do Sul (2005), mestrado (2008) e doutorado (2014) em Engenharia Mecânica pela mesma universidade. Atua na Escola Politécnica da Universidade do Vale do Rio dos Sinos (desde 2009) como professor nos cursos de graduação em Engenharia Mecânica e Engenharia de Energia, como coordenador do curso de graduação em Engenharia de Energia, e como Professor Colaborador do Programa de Pós-graduação em Engenharia Mecânica. Trabalhou na empresa TAP Maintenance and Engineering Brazil (2006-2011) como Engenheiro de Manutenção de Aeronaves, atuando principalmente nas áreas de célula e motores. Tem experiência na área de Engenharia Mecânica e Engenharia de Energia, com ênfase em fenômenos de transporte, atuando nas seguintes áreas: transferência de calor, simulação numérica, combustão, análise inversa, radiação térmica e modelagem de gases radiativos.

Downloads

Published

2016-03-08

Issue

Vol. 11 No. 2 (2015): Jul-Dec

Section

Article

License

I grant the journal Estudos Tecnológicos the first publication of my article, licensed under Creative Commons Attribution license (which allows sharing of work, recognition of authorship and initial publication in this journal).

I confirm that my article is not being submitted to another publication and has not been published in its entirely on another journal. I take full responsibility for its originality and I will also claim responsibility for charges from claims by third parties concerning the authorship of the article.

I also agree that the manuscript will be submitted according to the journal’s publication rules described above.