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首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Dielectric barrier discharge for multi-point plasma-assisted ignition at high pressures
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Dielectric barrier discharge for multi-point plasma-assisted ignition at high pressures

机译：介质阻挡放电，用于在高压下进行多点等离子体辅助点火

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摘要

Nanosecond surface dielectric barrier discharge (nSDBD) is an efficient tool for a multi-point plasma-assisted ignition of combustible mixtures at elevated pressures. The discharge develops as a set of synchronously propagated from the high-voltage electrode charged channels (streamers), with a typical density up to a few streamers per millimetre of the length of the electrode. In combustible mixtures, nSDBD initiates numerous combustion waves propagating from the electrode. Very little is known about nSDBD at high pressures. This work presents a comparative experimental study of the surface dielectric barrier discharge initiated by high-voltage pulses (U = +/-(20-60) kV) of different polarities in air at elevated pressures (P = 1-6 atm). Discharge morphology, deposited energy and velocity of the discharge front propagation are analysed. Differences between the discharges of positive and negative polarity, as well as the changes in the discharge morphology with changing of a gas mixture composition, are discussed.
机译：纳秒表面介电势垒放电（nSDBD）是用于在高压下多点等离子体辅助燃烧可燃混合物的有效工具。放电随着从高压电极带电通道（拖缆）同步传播而形成，其典型密度高达每毫米电极长度几个拖缆。在可燃混合物中，nSDBD会引发大量从电极传播的燃烧波。关于nSDBD在高压下知之甚少。这项工作提供了一个比较实验研究，研究了在高压下（P = 1-6 atm）空气中不同极性的高压脉冲（U = +/-（20-60）kV）引发的表面介电势垒放电。分析了放电形态，沉积能量和放电前沿传播速度。讨论了正极性和负极性放电之间的差异，以及随着气体混合物组成的变化而引起的放电形态变化。

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