Indexed by:期刊论文
Date of Publication:2018-01-05
Journal:APPLIED THERMAL ENGINEERING
Included Journals:SCIE、EI
Volume:128
Page Number:1520-1530
ISSN No.:1359-4311
Key Words:Flame front inclination instability; Porous media combustion; Inhomogeneous preheating temperature; distribution; Filtration combustion; Numerical simulation
Abstract:The present work examines effects of the initial inhomogeneous preheating temperature distribution on the flame front inclination instability in porous media combustion experimentally and numerically. The inclination evolution is observed in a vertical burner with a packed bed of alumina pellets experimentally. Correspondingly, a 2D two-temperature mathematical model is developed in simulation. To understand the inclination mechanism, the whole process of the inclination evolution is divided into three stages according to the inclination angle growth rate. Different performances of the inclination are obtained and discussed for different factors, such as the initial preheating temperature perturbation, the gas inlet velocity and the equivalence ratio. Conclusively, a larger initial preheating temperature perturbation, a greater gas inlet velocity and a smaller equivalence ratio can lead to a more serious inclination. The results are helpful to guide the design and operation of the porous media burner. (c) 2017 Elsevier Ltd. All rights reserved.
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