Abstract
The induced airflow velocity level and the mechanical efficiency are the significant issues for the surface DBD flow control application. In this paper, the effects of optical characteristics, electrical performances and mechanical properties of surface DBD with composite dielectric glass/PI film are investigated. The current, discharge plasma morphology, electrical power consumption, and induced airflow velocity are analyzed at applied voltage 17-23 kV with working frequency 9.15 kHz. The experiment results indicate that with the addition of PI film, the discharge just occurs near the exposed electrode and is suppressed obviously in the negative half cycle of current. Though the induced airflow velocity decreases slightly about 0.1-0.2 m/s at each voltage level, the mechanical efficiency substantially improves. The maximum mechanical efficiency increases by 25.12% under the 23 kV.
Highlights
Due to various advantages such as simple structure, easy installation, and fast response rate,[1,2] the surface DBD (Dielectric Barrier Discharges) has exerted a tremendous fascination among academic teams over the past decades
The current, discharge plasma morphology, electrical power consumption, and induced airflow velocity are analyzed at applied voltage 17-23 kV with working frequency 9.15 kHz
The experiment results indicate that with the addition of PI film, the discharge just occurs near the exposed electrode and is suppressed obviously in the negative half cycle of current
Summary
Due to various advantages such as simple structure, easy installation, and fast response rate,[1,2] the surface DBD (Dielectric Barrier Discharges) has exerted a tremendous fascination among academic teams over the past decades. It is of great significance to improve the mechanical properties of the surface DBD actuator, and reduce its electrical power consumption in the absence of airflow. Roth et al.[12] demonstrated the influence on the electromechanical characteristics of surface DBD based on a variety of dielectric materials with different permittivity. Scitation.org/journal/adv materials on the discharge of the surface DBD They suggested that electrical power consumption increased linearly with dielectric permittivity. Forte et al.[14] compared mechanical performances with two actuators which made with glass and polymethyl methacrylate (PMMA), respectively They confirmed that the insulating material with higher permittivity could generate higher induced airflow at the same voltage, which is consistent with the research by Roth. Because of the significant influence of different dielectric materials on surface DBD discharge, researches on characteristics of surface DBD made with composite dielectric are meaningful. The mechanical efficiency is compared, and the influence mechanism above key performances with the addition of PI film is discussed
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