Effects of Airflow on Atmospheric Pressure Surface Dielectric Barrier Discharge

摘要

Surface Dielectric Barrier Discharge (SDBD) has immense applied value in the field of flow control, from the aspects of flow separation suppression, drag reduction and/or lift increase of aircraft, as well as the noise reduction of airflow in recent years. Nowadays, numerous researches on the flow control technology of SDBD plasma focus on the body force and induced air velocity. However, there are few researches on the influence of airflow on the characteristic of SDBD.In this paper, an adjustable sinusoidal AC power is used to actuate the SDBD device. The frequency is maintained at 9.1 kHz and the power supply excitation voltage is fixed of 10.6 kV in the whole experiments. The impact mechanism of airflow on discharge is studied by using wind tunnel to control the air speed in the discharge space. By measuring the discharge voltage and current signals and power consumption of SDBD, the influence of airflow on the discharge intensity is analyzed. Meanwhile, the influence of airflow on the discharge uniformity and the evolution of the discharge morphology are analyzed by collecting the discharge images. The results are useful for the further understanding on the effects of the air flow on the SDBD characteristics.