Two-dimensional analytical model of flame characteristic in catalytic micro-combustors for a hydrogen-air mixture

被引:49
作者
Fanaee, S. A.
Esfahani, J. A. [1 ]
机构
[1] Ferdowsi Univ Mashhad, CEMCS, Mashhad 917751111, Iran
关键词
Micro-combustor; Analytical model; Flammability; Catalytic/non-catalytic condition; Quenching distance;
D O I
10.1016/j.ijhydene.2013.12.191
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present paper aims to analytically investigate combustion phenomenon in micro-combustors by using a two-dimensional model. The main objective is to analyze the effects of main parameters such as reaction zone thickness, maximum temperature and quenching distance throughout the combustor under catalytic and non-catalytic conditions. In solution of energy and mass equations, the temperature and mass dependant reaction rates are considered with an iterative procedure. The reaction zone thickness is considered as a variable and is predicted by the solution results of the present study. In order to validate the present model, the normalized magnitude of flame temperature is compared with published data, which shows an acceptable agreement and confirms the accuracy of the predicted data. The results show that the effect of catalytic surface on expanding flammability limits in a lean mixture is larger than the rich one. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:4600 / 4610
页数:11
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