| 三电极等离子体合成射流激励器工作特性参数影响实验 |
| |
| 引用本文： | 王林,罗振兵,夏智勋,周岩,邓雄. 三电极等离子体合成射流激励器工作特性参数影响实验[J]. 气体物理, 2017, 2(6): 1-8. DOI: 10.19527/j.cnki.2096-1642.2017.06.001 |
| |
| 作者姓名： | 王林 罗振兵 夏智勋 周岩 邓雄 |
| |
| 作者单位： | 国防科技大学空天科学学院，湖南长沙 410073 |
| |
| 基金项目： | 国家自然科学基金11502295国家自然科学基金11372349国防科学技术大学科研计划项目JC15-01-01 |
| |
| 摘 要： | 采用放电测量和光学诊断技术对三电极等离子体合成射流激励器放电特性及流场特性进行了实验研究，分析了放电电容、激励器腔体体积和射流出口直径对三电极等离子体合成射流流场分布及速度特性的影响.实验结果表明:三电极等离子体合成射流激励器放电过程包含触发、放电增强、放电衰减和电弧熄灭4个阶段，表现出典型的欠阻尼放电特征；等离子体合成射流流场包含射流主流、"前驱激波"和复杂的反射波系.放电电容、腔体体积和射流出口直径均存在一阈值，当电容和出口直径小于阈值、腔体体积大于阈值时，"前驱激波"以当地声速（约345 m/s）恒速传播，否则"前驱激波"则以大于345 m/s的速度传播，且与射流速度呈现相同的变化趋势，即随着放电电容和出口直径的增加而增大，随着腔体体积的增加而减小.
|
| 关 键 词： | 三电极激励器 等离子体合成射流 前驱激波 射流速度 实验研究 |
| 收稿时间： | 2017-09-21 |
Experimental Study of the Parameters Influence on Flow Characteristic of the Three-Electrode Plasma Synthetic Jet Actuator |
| |
| Affiliation: | College of Aeronautics and Astronautics, National University of Defense Technology, Changsha 410073, China |
| |
| Abstract: | Discharge and flow characteristics of a three-electrode plasma synthetic jet actuator have been experimentally studied by discharge measurements and high-speed shadowgraphy technology. The influence of capacitor, cavity volume and exit diameter on flowfield and speed of the actuator were analyzed. Results show that the discharge is a typical underdamped discharge and the period includes discharge trigger, discharge enhance, discharge decay and arc off. The flowfield of the plasma synthetic jet is composed by main jet, precursor shock and complicated reflect shock. Jet speed will increase with the increase of the capacitor and exit diameter and decrease with the increase of cavity volume. All of capacitor, cavity volume and exit diameter have threshold value, when the capacitor and exit diameter are less than the threshold value, or cavity volume greater than the threshold value, the speed of the precursor shock is invariant and is about 345m/s. Otherwise, the variation trends of the precursor shock speed are similar with the jet. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《气体物理》浏览原始摘要信息 |
|
点击此处可从《气体物理》下载免费的PDF全文 |
|
