Subadiabatic combustion of premixed gas in ceramic foam burner
Subadiabatic combustion of premixed gas in ceramic foam burner
复制标题
预混气体在泡沫陶瓷燃烧器中的亚绝热燃烧
DOI：
10.1016/j.ijheatmasstransfer.2015.07.122
复制
发表时间：
2015-12
影响因子：
5.2
通讯作者：
Qingzhao Li
中科院分区：
文献类型：
--
作者：
Baiquan Lin;Cheng Zhai;Yidu Hong;Qingzhao Li
低浓度煤层气在多孔介质中燃烧时，伴随着燃烧波的上游传播，会发生亚绝热燃烧。通过燃烧波的上游传播对多孔介质骨架进行预热，可以加宽甲烷燃烧的浓度下限。本研究建立了多孔介质燃烧实验装置，并利用该装置对数值模型进行了验证。在此基础上，对燃烧波的上游传播特性进行了数值模拟，考察了甲烷工作条件、壁面热损失和弥散效应等多种因素对燃烧波传播的影响。结果表明，燃烧波的上游传播速度保持均匀。在传播过程中，燃烧器出口的燃烧产物温度逐渐降低，而峰值温度保持不变。随着甲烷浓度的增加，燃烧波的上游传播速度和峰值温度均增大。随着进口气速的增加，上游传播速度减小，峰值温度升高。随着壁面热损失的增加，上游传播速度和峰值温度均减小。在燃烧波的上游传播过程中，CO排放量逐渐减少。随着进气速度和壁面热损失的增加，同一传播周期内的CO排放量逐渐增加。在燃烧波的上游传播过程中，NO排放量先是缓慢增加，然后趋于稳定。此外，随着进气速度的增加和壁面热损失的减小，同一传播周期内的NO排放量增加。
During the combustion of low-concentration coal mine methane in a porous medium, subadiabatic combustion will occur with the upstream propagation of combustion waves. The lower concentration limit of methane combustion can be broadened, when the porous medium skeleton is preheated by the upstream propagation of combustion waves. In this study, an experimental apparatus of porous medium combustion was built and used to validate a numerical model. Then numerical tests were conducted to characterize the upstream propagation of combustion waves, and investigate the effects of many factors (e.g. methane working conditions, heat loss through walls, and dispersion effect) on the propagation. Results show that the upstream propagation of combustion waves is kept at an even velocity. During the propagation, the combustion products temperature at the burner outlet gradually decreases, while the peak temperature is unchanged. With the increase of methane concentration, the upstream propagation velocity of combustion waves and the peak temperature both increase. As the inlet gas velocity is increased, the upstream propagation velocity decreases but the peak temperature raises. As the heat loss through walls is increased, the upstream propagation velocity and the peak temperature both decrease. The CO emission quantity gradually decreases during the upstream propagation of combustion waves. With the increase of inlet velocity and heat loss through walls, the CO emission quantity within the same propagation period gradually increases. The NO emission quantity first increases slowly and then stabilizes during the upstream propagation of combustion waves. Moreover, with the increase of inlet velocity and decrease of heat loss through walls, the NO emission quantity within the same propagation period increases.
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DOI：
10.1016/s0017-9310(03)00125-x
发表时间：
2003-08
影响因子：
5.2
作者：
K. V. Dobrego;I. Kozlov;V. Bubnovich;C. Rosas
通讯作者：
K. V. Dobrego;I. Kozlov;V. Bubnovich;C. Rosas
影响因子：
3.2
作者：
R. V. X.Fu;J. Gore
通讯作者：
R. V. X.Fu;J. Gore
影响因子：
1.9
作者：
Brian J. Vogel;J. Ellzey
通讯作者：
Brian J. Vogel;J. Ellzey
影响因子：
4.4
作者：
Bin Yang;S. Pope
通讯作者：
Bin Yang;S. Pope
影响因子：
7.2
作者：
A. Loukou;I. Frenzel;J. Klein;D. Trimis
通讯作者：
A. Loukou;I. Frenzel;J. Klein;D. Trimis