介质材料对NS-DBD等离子体除冰特性影响的实验研究  

Experimental Study on Influence of Dielectric Materials on Deicing Characteristics of NS-DBD Plasma

作　　者：郑猩 宋慧敏[1] 梁华[1] 魏彪[1] 苏志 谢理科 ZHENG Xing;SONG Huimin;LIANG Hua;WEI Biao;SU Zhi;XIE Like(Science and Technology on Plasma Dynamics Laboratory,Air Force Engineering University,Xi’an 710038,China)

机构地区：[1]空军工程大学等离子体动力学重点实验室,西安710038

出　　处：《高电压技术》2021年第10期3705-3715,共11页High Voltage Engineering

基　　金：国家自然科学基金(91941105)。

摘　　要：为了研究介质材料的种类和厚度对等离子体除冰特性的影响规律,在无来流条件下进行了纳秒脉冲介质阻挡放电等离子体激励除冰实验。使用示波器记录激励器放电过程中的电压电流波形,通过相机和红外热像仪分别记录了动态除冰过程与激励器表面温度分布。结果表明,放电电流峰峰值、放电功率及激励器表面平均温度都与介质层的介电常数呈正相关,与介质层厚度呈负相关。激励器表面达到热平衡后,氧化铝陶瓷(相对介电常数ε=9)激励器表面平均温度比聚四氟乙烯(相对介电常数ε=2.55)高30℃;介质材料相同时,厚度为0.3 mm的激励器表面平均温度比0.8 mm高15℃。因此,选择介电常数大、厚度小的介质材料,有助于提高等离子体激励器的表面温度进而提升除冰能力。最后,对介质阻挡放电等离子体的除冰机理进行了分析,气体快速加热效应在除冰过程中起关键作用。In order to study the influences of the type and thickness of dielectric materials on the characteristics of plasma deicing, experiments of nanosecond-dielectric barrier discharge(NS-DBD) plasma actuation deicing were carried out under the condition of no incoming flow. Oscilloscope was used to record the voltage and current waveforms during the discharge of the actuator. Infrared thermal imaging camera and SLR camera were used to record the temperature changes and ice melting images during the experiments. The results show that the peak-to-peak discharge current, the discharge power and the average surface temperature are all positively correlated with the dielectric constant of the dielectric layer,and negatively correlated with the thickness of the dielectric layer. After the actuator surface reaches a thermal equilibrium, the average surface temperature of the alumina ceramic(dielectric constant ε=9) actuator is 30 ℃ higher than that of PTFE(dielectric constant ε=2.55). For the same dielectric material, the surface temperature of the actuator with a thickness of 0.3 mm is 15 ℃ higher than that of 0.8 mm. Therefore, choosing a dielectric material with a large dielectric constant and a small thickness help increase the surface temperature of the plasma actuator and thus enhance the deicing ability. Finally, the deicing mechanism of NS-DBD plasma is analyzed. The rapid heating effect of gas plays a key role in the deicing process.

关 键 词：纳秒脉冲 介质阻挡放电 等离子体 介质材料 除冰 

分 类 号：V25[一般工业技术—材料科学与工程] V244.15[航空宇航科学与技术—航空宇航制造工程]