A novel strategy to accurately represent the carrier gas properties of droplets evaporating in a combustion environment

Autor(es)

Sacomano Filho, Fernando Luiz ^{[1, 2]} ; Krieger Filho, Guenther Carlos ^[2] ; van Oijen, Jeroen Adrianus ^[3] ; Sadiki, Amsini ^[1] ; Janicka, Johannes ^[1]

Afiliação do(s) autor(es)

^[1] Tech Univ Darmstadt, Inst Energy & Power Plant Technol, Darmstadt - Germany

^[2] Univ Sao Paulo, Lab Environm & Thermal Engn, Sao Paulo - Brazil

^[3] Tech Univ Eindhoven, Dept Mech Engn, Eindhoven - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER; v. 137, p. 1141-1153, JUL 2019.
• Citações Web of Science: 1

Resumo

A novel approach to accurately represent the carrier gas thermo-chemical properties of droplets evaporating in combustion environment is proposed and validated in the context of reduced capprhes. Numerical analyses of two of the most employed droplet evaporation models in computational fluid dynamiapplications and their subsequent impact on combustion processes are also performed. The study comprehends a systematic investigation of both models and different procedures used to address the relevant thermo-chemical properties for the evaporation modeling. Initially, investigations are addressed in a single droplet framework. Herein, available experimental data give support to the corresponding discussions. In a second part, both selected models and the simplification using air as carrier gas mixture are investigated in the context of flames propagating in droplets mists. A detailed chemistry model is used to represent the combustion of ethanol in air. A simplification strategy is subsequently investigated in terms of the relevant thermo-chemical properties for the evaporation modeling. The resulting strategy is successfully validated in a numerical context for flames propagating in droplet mists. Results aim to help the choice of methods employed for droplet evaporation modeling in a more general context. The methodology adopted in our analyses allows the assessment of each simplification and converges to an optimal combination of the studied methods. (C) 2019 Elsevier Ltd. All rights reserved. (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