Flame stabilization and emission of small Swiss-roll combustors as heaters
Flame stabilization and emission of small Swiss-roll combustors as heaters
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DOI：
10.1016/j.combustflame.2005.01.006
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发表时间：
2005-05-01
影响因子：
4.4
通讯作者：
Maruta, K
中科院分区：
文献类型：
--
作者：
Kim, NI;Kato, S;Maruta, K
对小型瑞士卷燃烧室的特性进行了详细的实验研究。研究了三种不同设计的瑞士卷燃烧室和两种传热条件。检查了设计参数对这些燃烧器性能的影响。每个燃烧室由中心的燃烧区域（称为燃烧室）和双螺旋形通道组成，其宽度小于正常状态下丙烷预混火焰的最小熄灭距离。通过使用燃烧气体的再循环热锋，可以在大范围的当量比和平均速度下成功稳定火焰，并且没有观察到吹熄。还研究了燃烧器的温度分布、气体温度的变化以及燃烧器排出气体的浓度。发现燃烧器的平均温度由燃烧器的辐射热损失和燃烧器释放的总化学能决定。评估了燃烧器作为加热器的效率。随着燃烧室变小，其作为加热器的热效率提高，NOx排放量减少，而CO排放量增加。通过在排气口添加催化反应器，发现可以消除CO的排放。这项研究为小型瑞士卷燃烧器提供了新的实验结果，这代表了微型燃烧器发展的重要一步。 © 2005 燃烧研究所。由爱思唯尔公司出版。保留所有权利。
The characteristics of small Swiss-roll combustors were investigated experimentally in detail. Three types of Swiss-roll combustors of different designs and two cases of heat transfer conditions were studied. The, effects of design parameters on the performance of these combustors were examined. Each combustor consisted of a combustion region at the center (called the combustion room) and double spiral-shaped channels, the widths of which were smaller than the minimum quenching distance of a propane premixed flame at a normal state. Flames could be stabilized successfully for a wide range of equivalence ratios and mean velocities by using the recirculated heat front the burned gas, and blow-off was not observed. Temperature distributions of the combustors, variation of gas temperature, and the concentrations of the exhaust gas from the combustors were also investigated. Mean temperatures of the combustors were found to be governed by both the radiant heat loss from the combustors and the total chemical energy liberated by the combustors. Efficiencies of the combustors as heaters were evaluated. As a combustor became smaller, its thermal efficiency as a heater increased and its NOx emission decreased, while the emission of CO increased. By adding a catalytic reactor at the exhaust port, it was found that the emission of CO could be eliminated. This study provides new experimental results for a small Swiss-roll combustor, which represents an essential step toward the development of a microcombustor. © 2005 The Combustion Institute. Published by Elsevier Inc. All rights reserved.