Plasma morphology and induced airflow characterization of a DBD actuator with serrated electrode

摘要: Plasma morphology and airflow induced by a dielectric barrier discharge (DBD) actuator, whose exposed electrode geometry is designed with serrated configuration, are investigated in quiescent air compared DBD actuator consisting of electrodes standard linear strip configuration. ICCD imaging, electrical measurements three-component laser Doppler velocimetry were carried out to compare various features these two actuators. With the images show that streamers bent, whereas configuration they straight. These curved induce three-dimensional flow topology, which confirmed friction line visualization velocity measurements. Whereas two-dimensional wall-jet transverse component measured implying creation spanwise-periodic vorticity. Phase-averaged allow temporal variation this be highlighted. On both sides tooth, it has qualitatively same as longitudinal respect negative or positive half-cycles high voltage signal. Moreover, operating parameters, was higher, particularly at tips.