水平动量注入型等离子体合成射流激励器工作特性  

Operating Characteristic of the Horizontal Momentum Injection Actuator of Plasma Synthetic Jet

作　　者：张宇超 谭慧俊[1] 程林 何小明[1] 黄河峡[1] 庄逸[1] 张悦[1] Zhang Yu-chao;Tan Hui-jun;Chen Lin;He Xiao-ming;Huang He-xia;Zhuang Yi;Zhang Yue(Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《气体物理》2017年第6期9-17,共9页Physics of Gases

基　　金：中央高校基本科研业务费专项资金(NS2017010)

摘　　要：等离子体合成射流控制技术因其具有不需要外部气源、工作频带宽、射流速度高、射流净质量通量为零、低功耗、激励器形式多样、环境适应性强等特点成为了目前针对高速流场主动流动控制技术中应用潜能大、有望实现实际工程应用突破的流动控制装置.传统的等离子体激励器的出口多为垂直于流向或与流向成一定夹角故垂直于流向的动量分量会对激励器的流动控制能力产生影响.为增强流向动量注入能力拟设计一种新型的水平动量注入型等离子体合成射流激励器.主要内容有采用外部电路电参数测量与高速纹影技术对激励器常压下单周期工作特性与重频工作特性进行了初步研究.对水平动量注入型等离子体合成射流激励器的射流结构进行了分析探究了该激励器工作频率对射流流场的流场特性与控制能力的影响.最后在高速纹影测量的基础上开展了激励器高频工作时均出口动压的研究.实验表明水平动量注入型激励器单周期射流初始速度达到220 m/s单周期激波初始速度达到477 m/s.此外工作频率对于激励器的影响主要体现在对激励器控制范围的影响当激励器工作频率增高时在相同位置时激励器的动压输入能力下降.Plasma synthetic jet technique not only has the advantages of synthetic jet,such as zero-net-mass-flux and needlessness for additional gas source,but also has the advantages of plasma,such as high working frequency and the ability of rapid response,which gives itself the great potential for application.The direction of the jet exit of traditional actuator has a definite angle with the horizontal direction.So,the dynamic pressureis influenced by the direction of the jet exit of the actuator.The model of Narayanaswamy et al designs the actuator,in order to enhance the capability of horizontal momentum injection.Schlieren and the testing technique of electric parameters are used to test the operating characteristics of the horizontal momentum injection actuator.This paper mainly focuses on the characteristic of flow-flied and dynamic pressure.What's more,the experiment of dynamic pressure is conducted to research the flow control capability.The experimental results show that the initial velocities of jet front and blast wave reach about 220m/s and 477m/s,respectively.Moreover,the deposited energy decreases with the operating frequency,resulting in lower exit dynamic pressure.

关 键 词：等离子体合成射流 水平动量输入 高速纹影 动压测量 高频放电 

分 类 号：V211.71[航空宇航科学与技术—航空宇航推进理论与工程]