Gas-heating phenomenon in a nanosecond pulse discharge in atmospheric-pressure air and its application for high-speed flow control
Gas-heating phenomenon in a nanosecond pulse discharge in atmospheric-pressure air and its application for high-speed flow control
复制标题
DOI：
10.1088/1361-6595/aae23c
复制
发表时间：
2018-10
影响因子：
3.8
通讯作者：
A. Komuro;K. Takashima;Kento Suzuki;Shoki Kanno;T. Nonomura;T. Kaneko;A. Ando;K. Asai
中科院分区：
文献类型：
--
作者：
A. Komuro;K. Takashima;Kento Suzuki;Shoki Kanno;T. Nonomura;T. Kaneko;A. Ando;K. Asai
讨论了常压空气脉冲放电中气体加热现象与翼型周围流动中分离剪切层之间的相互作用。本文的前半部分详细介绍了常压空气中脉冲放电气体加热模型的发展，并对最近的研究成果进行了综述。特别注意的是快速和慢速燃气加热的过程。在论文的后半部分，给出了高速纹影可视化的实验结果，并基于纹影信号强度的周期分量和时间平均分量，讨论了纳秒脉冲驱动介质阻挡放电等离子体致动器（ns-DBDPA）驱动与密度场的相互作用。分离剪切层中产生的纹影信号对比度的时间平均强度随ns-DBDPA归一化驱动频率F+的变化而变化。当F+从0.1增加到2时，纹影信号强度的周期分量增加，导致纹影信号的时间平均对比度降低。当F+ >2时，ns-DBDPA驱动产生的热空气沿着分离的剪切层积累，导致纹影信号的时间平均对比度增加。
The interaction between the gas-heating phenomenon in a pulsed discharge in atmospheric-pressure air and the separated shear layer in the flow around the airfoil is discussed. The first half of the paper details the development of the modeling for gas heating in a pulsed discharge in atmospheric-pressure air and reviews recent research results. Particular attention is paid to the processes of fast and slow gas heating. In the latter half of the paper, the experimental results of the high-speed Schlieren visualization are presented and the interaction between the nanosecond-pulse-driven dielectric-barrier-discharge plasma actuator (ns-DBDPA) actuation and the density field is discussed, based on the periodic and time-averaged components of the Schlieren signal intensity. The time-averaged intensity of the contrast of the Schlieren signal that originates in the separated shear layer changes according to the normalized actuation frequency of ns-DBDPA, F+. As F+ increases from 0.1 to 2, the periodic component of the Schlieren signal intensity increases, resulting in a decrease in the time-averaged contrast of the Schlieren signal. When F+ > 2, the heated air caused by ns-DBDPA actuation is accumulated along the separated shear layer, resulting in an increase in the time-averaged contrast of the Schlieren signal.