Plasma Sheet Actuator Driven by Repetitive Nanosecond Pulses with a Negative DC Component

• Published in: Plasma science & technology Vol. 14; no. 4; pp. 327 - 332
• Main Author: 宋慧敏 张乔根 李应红 贾敏 吴云 梁华
• Format: Journal Article
• Language: English
• Published: 01.04.2012
• Subjects: 介质阻挡放电; 执行机构; 直流分量; 空气动力学; 等离子体片; 纳秒脉冲; 脉冲放电等离子体; 脉冲驱动
• ISSN: 1009-0630
• DOI: 10.1088/1009-0630/14/4/11

A type of electrical discharge called sliding discharge was developed to generate plasma aerodynamic actuation for flow control. A three-electrode plasma sheet actuator driven by repetitive nanosecond pulses with a negative DC component was used to generate sliding discharge, which can be called nanosecond-pulse sliding discharge. The phenomenology and behaviour of the plasma sheet actuator were investigated experimentally. Discharge morphology shows that the formation of nanosecond-pulse sliding discharge is dependent on the peak value of the repetitive nanosecond pulses and negative DC component applied on the plasma sheet actuator. Compared to dielectric barrier discharge （DBD）, the extension of plasma in nanosecond-pulse sliding discharge is quasi-diffusive, stable, longer and more intensive. Test results of particle image velocimetry demonstrate that the negative DC component applied to a third electrode could significantly modify the topology of the flow induced by nanosecond-pulse DBD. Body force induced by the nanosecond-pulse sliding discharge can be approximately in the order of mN. Both the maximum velocity and the body force induced by sliding discharge increase significantly as compared to single DBD. Therefore, nanosecond-pulse sliding discharge is a preferable plasma aerodynamic actuation generation mode, which is very promising in the field of aerodynamics.