Effects of high-speed airflows on a surface dielectric barrier discharge
Effects of high-speed airflows on a surface dielectric barrier discharge
复制标题
DOI：
10.1088/0022-3727/40/6/021
复制
发表时间：
2007-03
期刊：
影响因子：
--
通讯作者：
S. Pavón;J. Dorier;C. Hollenstein;P. Ott;P. Leyland
中科院分区：
文献类型：
--
作者：
S. Pavón;J. Dorier;C. Hollenstein;P. Ott;P. Leyland
详细研究了高速气流与表面介质阻挡放电(DBD)的相互作用。在本文中，证明了DBD可以在跨音速气流中维持，等熵马赫数高达1.1。等离子体的电学特性以及光学特性都使用了一台ccd摄像机和一根光电倍增管。研究了不同的气流速度、等离子体激励频率和电压。气流对等离子体特性有很大的影响：辉光成分减少，放电变得更细丝，最重要的是，在高流速下，单个微放电的发光持续时间减少了十倍以上。大的边缘效应在流动和等离子体之间的相互作用中起着关键作用。这些结果为介质阻挡放电在跨声速和超音速气体流动中的应用及其在气流控制和等离子体辅助燃烧中的应用提供了新的前景。
A detailed study of the interaction between high-speed gas flows and surface dielectric barrier discharges (DBD) is presented. In the present paper, it is demonstrated that a DBD can be sustained in transonic airflows, up to isentropic Mach numbers of 1.1. The plasma is characterized electrically, as well as optically with a CCD camera and a photomultiplier tube. Different airflow velocities, plasma excitation frequencies and voltages are investigated. The airflow has a significant influence on the plasma characteristics: the glow component is reduced, the discharge becomes more filamentary and most importantly, the light emission duration from individual microdischarges is reduced by more than a factor of ten at high flow velocities. Large edge effects play a key role in the interaction between the flow and the plasma. These results offer new perspectives for the use of dielectric barrier discharges in transonic and supersonic gas flows and their applications to airflow control and to plasma-assisted combustion.