表面介质阻挡放电致动器的配置特性研究

沿面介质阻挡放电(SDBD)等离子体发生器在等离子体的产生中起着重要的作用.通过实验和仿真计算相结合的的方法,研究了大气压环境下等离子体发生器的结构对正弦波电源作用下放电的影响.结果表明:相同条件下,对称结构发生器电场强度最大,产生的等离子体分布在正面电极的两侧,等离子体层面积大,亮度高,但消耗功率较大;不对称结构发生器电场强度最低,产生的等离子体在正负电极处对称分布,整体看上去比较均匀;不对称结构底面电极封装之后正面电极处电场强度增强,等离子体分布在正面电极的一侧,亮度居中,底面电极附近的电场降低,抑制了低电极放电消耗能量,但均匀性最差.证明了等离子体激励器的封装抑制了底面电极的放电,同时降低了功耗.

Study on the Configuration Properties of the Surface Dielectric Barrier Discharge Actuator

Surface dielectric barrier discharge (SDBD) plasma actuator can produce uniform plasma layer with larger area, of which the configuration directly affects the efficiency of the plasma. In this paper, we present an experimental and numerical method on the properties of three widely used plasma actuator configurations. Results show that, under the same conditions, the symmetric configuration actuator where plasma generated at both sides of the upper electrode, has the maximum static electric field intensity, the largest plasma layer area, the highest brightness, and the biggest power consumption. The plasma produced by the asymmetric configuration actuator symmetrically distributes at the upper and lower electrodes, with the lowest brightnessandthe overall look was uniform, but the static electric field intensity of this configuration is minimum. The static electric field intensity in the vicinity of the upper electrodeincreasesin the case of the asymmetric configurationactuator with an encapsulated lower grounded electrode. Plasma distributes only in one side of the upper electrode, with the smallest plasma and the worstuniformity. It is verified that the encapsulated SDBD restrains discharge at the lower grounded electrode resulting in the lowest power dissipated.