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JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)  2014, Vol. 48 Issue (4): 660-665    DOI: 10.3785/j.issn.1008-973X.2014.04.015
    
Super-adiabatic characteristic of porous media combustion at different wave propagation direction
LING Zhong-qian1,2, ZHOU Hao2, KONG Jun-jun2
1. College of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China;
2. State Key Laboratory of Clean Energy Utilization, Zhejiang University , Hangzhou 310027, China
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Abstract  

Super-adiabatic combustion in particle filled combustor was experimentally conducted by premixed methane/air mixtures under the different combustion wave propagation. The super-adiabatic combustion temperatures were compared with those of the under-adiabatic combustion at different equivalence ratio, in addition to the combustion emissions at corresponding conditions. The influence of combustion wave propagation direction on flame temperature of super-adiabatic combustion was analyzed at the certain operation conditions. Results show that the rate of flame temperature increase at super-adiabatic combustion is much higher than that of the under-adiabatic combustion. The combustion temperature easily exceeds the adiabatic combustion temperature when the combustion wave propagates to the downstream, and the super-adiabatic combustion appears. The combustion temperature is less than the adiabatic combustion temperature easily when the combustion wave propagates to the upstream, and the under-adiabatic combustion appears. The CO emission at super-adiabatic combustion is lower than that of the under-adiabatic combustion at the certain operating conditions, but the NOx emission volume fraction is higher.



Published: 03 September 2014
CLC:  TK 124  
Cite this article:

LING Zhong-qian, ZHOU Hao, KONG Jun-jun. Super-adiabatic characteristic of porous media combustion at different wave propagation direction. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(4): 660-665.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.04.015     OR     http://www.zjujournals.com/eng/Y2014/V48/I4/660


多孔介质燃烧波传播中的“超焓”特性

在自行搭建的颗粒堆积多孔介质器中,以甲烷/空气为燃料,对多孔介质燃烧波传播过程中的“超焓”燃烧特性进行实验研究.在对比“超焓”与“非超焓”燃烧火焰温度的基础上,探讨不同当量比下燃烧波传播方向对“超焓”燃烧火焰温度的影响,对相应燃烧状态下的污染物排放特性进行比较.结果表明:随着当量比的升高,“超焓”燃烧状态下的火焰温度升高速率高于非“超焓”燃烧状态;燃烧波正向传播时,燃烧火焰温度超过绝热燃烧温度,出现“超焓”燃烧状态;燃烧波逆向传播时,燃烧火焰温度远低于绝热燃烧温度,出现“非超焓”燃烧状态;“超焓”状态下的CO排放体积分数低于“非超焓”燃烧,NOx排放体积分数相对较高.

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