Ignition of hydrocarbon : air mixtures by a nanosecond surface dielectric barrier discharge
Ignition of hydrocarbon : air mixtures by a nanosecond surface dielectric barrier discharge
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DOI：
10.1088/0963-0252/24/4/045014
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发表时间：
2015-07
影响因子：
3.8
通讯作者：
E. Anokhin;D. N. Kuzmenko;S. Kindysheva;V. Soloviev;N. Aleksandrov
中科院分区：
文献类型：
--
作者：
E. Anokhin;D. N. Kuzmenko;S. Kindysheva;V. Soloviev;N. Aleksandrov
在室温、常压和负压条件下，对纳秒表面介质阻挡放电点燃化学计量比碳氢化合物：空气混合物进行了实验研究。对不同电压极性和高压电极形状进行了观察。通过处理放电间隙图像，测量了C2H2：空气混合物中的点火延迟时间和燃烧波的速度与施加电压的关系。得出结论，混合物更容易点燃的放电为负极性的电压，当它从一个齿轮状电极发展。放电的2D模拟进行计算的时间和空间分布的产生的活性物质和气体温度在放电过程中，并在其余辉的两个电极极性。结果表明，点火的电压阈值由负极性放电低于正极性放电，在定性与观察。这是由于当向高压电极施加负极性的电压时，在高压电极的紧邻处形成了具有有效活性物质产生和快速气体加热的区域。
Ignition of stoichiometric hydrocarbon : air mixtures by a nanosecond surface dielectric barrier discharge has been experimentally studied at room temperature and atmospheric and subatmospheric pressures. Observations were made for different voltage polarities and shapes of the high-voltage electrode. The ignition delay time and the velocity of the combustion wave were measured in a C2H2 : air mixture versus applied voltage by processing discharge gap images. It was concluded that the mixtures are ignited easier by the discharge for a negative voltage polarity and when it develops from a gear-like electrode. A 2D simulation of the discharge was performed to calculate the temporal and spatial distributions of generated active species and gas temperature during the discharge and in its afterglow for both electrode polarities. It was shown that the voltage threshold for ignition by a negative-polarity discharge is lower than that for a positive-polarity discharge, in qualitative agreement with observations. This is due to the formation of a region with efficient active species production and fast gas heating in the immediate vicinity of the high-voltage electrode when a voltage of negative polarity is applied to it.