Investigations of Evaporative Cooling and Turbulence Flame Interaction Modeling in Ethanol Turbulent Spray Combustion Using Tabulated Chemistry

Autor(es)

Sacomano Filho, Fernando Luiz ^[1] ; Dressler, Louis ^[2] ; Hosseinzadeh, Arash ^[2] ; Sadiki, Amsini ^[2] ; Krieger Filho, Guenther Carlos ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Lab Environm & Thermal Engn, BR-05508030 Sao Paulo - Brazil

^[2] Tech Univ Darmstadt, Inst Energy & Power Plant Technol, D-64287 Darmstadt - Germany

• Tipo de documento: Artigo Científico
• Fonte: FLUIDS; v. 4, n. 4 DEC 2019.
• Citações Web of Science: 0

Resumo

Evaporative cooling effects and turbulence flame interaction are analyzed in the large eddy simulation (LES) context for an ethanol turbulent spray flame. Investigations are conducted with the artificially thickened flame (ATF) approach coupled with an extension of the mixture adaptive thickening procedure to account for variations of enthalpy. Droplets are tracked in a Euler-Lagrangian framework, in which an evaporation model accounting for the inter-phase non-equilibrium is applied. The chemistry is tabulated following the flamelet generated manifold (FGM) method. Enthalpy variations are incorporated in the resulting FGM database in a universal fashion, which is not limited to the heat losses caused by evaporative cooling effects. The relevance of the evaporative cooling is evaluated with a typically applied setting for a flame surface wrinkling model. Using one of the resulting cases from the evaporative cooling analysis as a reference, the importance of the flame wrinkling modeling is studied. Besides its novelty, the completeness of the proposed modeling strategy allows a significant contribution to the understanding of the most relevant phenomena for the turbulent spray combustion modeling. (AU)

• Processo FAPESP: 17/06815-7 - Estudo da combustão de spray multi-componente baseado em bio-combustível utilizando dinâmica dos fluidos computacional
• Beneficiário: Fernando Luiz Sacomano Filho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado