The invention discloses a novel dielectric barrier discharge plasma exciter, which uses a very fine wire as the upper electrode, and the upper electrode of the wire is connected with the high voltage end of the high frequency and high voltage power supply. The surface of the upper electrode of the wire is smooth and burr-free, and the discharge is uniform. Without the tip discharge, it is difficult to break down, thus effectively prolonging the life of the plasma exciter. When the metal model is installed on the metal model, the metal model is directly used as the bottom electrode. The bottom electrode of the metal film is connected with the low voltage end of the high-frequency and high-voltage power supply. The very fine wire on the surface of the model has little influence on the surface of the model. Installing an actuator on the model of high-precision shape can avoid the interference to the shape and do not affect its aerodynamic performance. The voltage and frequency of high-frequency and high-voltage power supply can be adjusted. The upper electrode of wire and the lower electrode of metal film are separated by dielectric layer. The upper electrode of metal wire is tightened when installed. It is fixed by insulating countersunk head screw. The arrangement is simple, reliable and easy to install.
【技术实现步骤摘要】
一种新型介质阻挡放电等离子体激励器
本专利技术涉及等离子体流动控制
,具体地说,涉及一种新型介质阻挡放电等离子体激励器。
技术介绍
介质阻挡放电等离子体激励器有设计简单、无移动部件、易安装、能耗比高、响应速度快等诸多特点,使得其在流动控制领域越来越受到关注,其在边界层流动控制、翼型增升减阻、翼型分离流动等多领域均取得了非常好的效果。介质阻挡放电等离子体主要由裸露电极、埋藏电极和绝缘介电层组成,其中裸露电极暴露在空气中,埋藏电极包裹在绝缘介质中,裸露电极与埋藏电极被绝缘介电层隔开,对裸露电极施加高频高压交流电,裸露电极附近空气被电离产生等离子体,形成壁面射流,从而对流动进行干扰以改善流场品质。中国专利CN101784155B中以及专利技术专利CN203554775U中,公开了介质阻挡放电等离子体激励器,其裸露电极均为矩形形状的金属薄膜,在实际应用中,采用将上下电极以及绝缘层贴在模型表面,会对各种模型如翼型、机翼表面形状有较大影响,甚至影响其气动性能。此外,在粘贴上下电极时,边缘不可避免的小毛刺会产生尖端放电,极易发生击穿现象导致等离子体DBD激励器损坏,无法正常工作。现有公开的文献“离子体流动控制研究进展与展望[J]”(航空学报,2015,36(2):381-405)文中介绍的介质阻挡放电等离子体激励器由于其上电极采用金属薄膜,其边缘不可避免会出现毛刺导致容易发生尖端放电,其寿命较低,且在模型上安装会影响模型表面外形,影响气动性能。因此,迫切需要一种既能实现等离子体流动控制,又不影响模型外形、且寿命相对较长的新型等离子体激励器。
技术实现思路
为了避免现有 ...
【技术保护点】
1.一种新型介质阻挡放电等离子体激励器,其特征在于:包括金属丝上电极、绝缘介电层、金属薄膜下电极和绝缘沉头螺钉,所述金属丝上电极连接高频高压电源的高压端,金属薄膜下电极连接高频高压电源的低压端,高频高压电源的电压与频率可调,金属丝上电极与金属薄膜下电极通过绝缘介电层隔开,金属丝上电极在安装时通过绝缘沉头螺钉拉紧固定;所述金属丝上电极直径取值范围为0.02~0.5mm。
【技术特征摘要】
1.一种新型介质阻挡放电等离子体激励器,其特征在于:包括金属丝上电极、绝缘介电层、金属薄膜下电极和绝缘沉头螺钉,所述金属丝上电极连接高频高压电源的高压端,金属薄膜下电极连接高频高压电源的低压端,高频高压电源的电压与频率可调,金属丝上电极与金属薄膜下电极通过绝缘介电层隔开,金属丝上电极在安装时通过绝缘沉头螺钉拉紧固定;所述金属丝上电极直径取值范围为0.02~0.5mm...
【专利技术属性】
技术研发人员:薛明,高超,武斌,王玉帅,胡旭,
申请(专利权)人:西北工业大学,
类型:发明
国别省市:陕西,61
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