三电极合成射流激励器电极布局与电源系统的匹配特性  

Arrangement of Three-electrode Synthetic Jet Actuator and Its Matching Characteristics with Power System

作　　者：宋慧敏[1] 吴俊锋[1] 张志波[1] 贾敏[1] 金迪[1] 杨永红 

机构地区：[1]空军工程大学等离子体动力学重点实验室 [2]95156部队

出　　处：《高电压技术》2017年第6期1784-1791,共8页High Voltage Engineering

基　　金：国家自然科学基金(11472306;51407197)~~

摘　　要：为了有效增加合成射流激励器的放电强度,提高放电稳定性,使用直流电源和不同类型的触发电源,对三电极合成射流激励器的放电特性进行研究,提出了设计准则,优化了电极布局。结果表明:触发电源脉冲电压的上升时间对触发特性有重要的影响。纳秒触发源电压上升时间与击穿延迟时间相近,可促使2个放电通道同时形成,实现同时击穿;微秒触发源配合直流激励只能使2个放电通道依次形成,放电模式为依次击穿。三电极合成射流激励器的放电通道长度和稳定放电时放电通道的可调节范围由触发电源与直流电源共同决定。采用纳秒脉冲触发源和较大的直流电压激励时,可显著提高三电极合成射流激励器的最大放电间距和放电稳定性。在4 k V直流激励下微秒脉冲触发形成的最大间距为7.5 mm,而在无直流电压输入时,纳秒脉冲触发形成的最大放电间距已达10 mm。当施加-4 k V直流电压时,纳秒脉冲触发形成的最大放电间距更是达到了17.5 mm。In order to increase the discharge intensity and stability of synthetic jet actuator, we investigated the three-electrode actuator and its discharge characteristics by using DC power supply and different trigger power supply. Moreover, we proposed the design criteria and optimized the arrangement of the three electrodes. The results show that as the rise time of the nanosecond pulse power supply is close to the breakdown delay time, the voltage cross the anode channel and cathode channel between the anode electrode and trigger electrode ＆ cathode electrode and trigger electrode can achieve the breakdown voltage simutaneously when the two discharge channels form. When the rise time of the volt- age slows down to microsecond, the voltage across the two channels cannot rise to the breakdown voltage simutaneously. At this time, if proper DC voltage is taken, there will be a delay time between formations of the two discharge channels. Above all, the channel distance and the adjustable channel range under stable discharge are determined by both trigger power supply and DC power supply. Nanosecond pulse power and high DC voltage can markedly increase the maximum discharge distance and the discharge stabilization. The largest discharge distance by p.s pulse power and 4 kV DC power is 7.5 mm, while 10ram by ns pulse power ＆ 0 kV DC power and 17.5 mm by ns pulse power ＆ -4 kV DC power.

关 键 词：等离子体流动控制 三电极 合成射流 脉冲放电 匹配特性 

分 类 号：O461.2[理学—电子物理学] O53[理学—物理]