介质阻挡放电等离子体防除冰实验研究

Experimental study on DBD discharge plasma for anti-icing and de-icing

在无风环境下分别进行了交流介质阻挡放电(AC-DBD)、纳秒脉冲介质阻挡放电(NS-DBD)及射频介质阻挡放电(RF-DBD)等离子体除冰实验研究,采用高速成像技术与红外测温成像技术分别记录除冰过程中介质层表面相变及温度动态变化过程,对比分析了三者的优缺点及传热机理。结果表明,在功率相同的条件下,AC-DBD等离子体激励的温升迅速,加热范围广,除冰实验效果最佳;对于NS-DBD等离子体激励,低压高频的除冰性能明显优于高压低频;RF-DBD等离子体激励放电主要集中在电极条边缘,放电剧烈,但电极间的区域温度较低,导致整体除冰效果不佳。最后,选择除冰效果最好的AC-DBD等离子体激励,在结冰风洞中进行了防冰实验研究。结果表明,AC-DBD等离子体激励整体防冰效果较好,但在防冰过程中,前缘会出现局部结冰,需进一步优化激励器构型及能量,提高AC-DBD等离子体激励防冰效果。

In this paper, AC dielectric barrier discharge(AC-DBD), nanosecond pulse dielectric barrier discharge(NS-DBD) and radio frequency dielectric barrier discharge(RF-DBD) plasma de-icing experiments were carried out in a windless environment. Using high-speed imaging technology and infrared temperature imaging technology to record the dynamic process of the phase transition of the dielectric layer, systematically analyze the advantages and disadvantages of the three and the heat transfer mechanism. The results show that when the power output of the static experiment is the same, the temperature rise of the AC-DBD plasma is rapid, and the de-icing experiment is the best. For the NS-DBD plasma, the low-pressure high-frequency de-icing performance is obviously better than the high-voltage low-frequency;For RF-DBD, the discharge of the plasma is mainly concentrated at the edge of the electrode strip, and the discharge is severe, but the temperature between the electrodes is low, resulting in poor overall deicing effect. Finally, experimental verification of AC-DBD plasma anti-icing was carried out in the icing wind tunnel. In the wind tunnel test, the AC-DBD plasma has a good anti-icing effect in the downstream of the airfoil, but the anti-icing effect is not good at the leading edge position. In the next step, it is necessary to optimize the leading edge actuator configuration and improve the airfoil leading edge anti-icing effect.