同軸型 DBD プラズマアクチュエータを用いた噴流の拡散促進

抄録

In this study, coaxial type DBD plasma actuator was designed for jet flow diffusion control. DBD plasma actuator mounted on the tip of the converging nozzle and gives the induced flow on the boundary layer flow. DBD plasma actuator was driven by burst-mode and studied diffusion of jet. We applied peak-to-peak voltage 14kV to DBD-PA at time of Reynolds number 1000, 2000, 4000, 5000. The wave form used sin wave and square wave with all Reynolds number. As a result a section becoming f_vortex > f_burst, f_vortex = f_burst, f_vortex < f_burst exists in x/d=1(f_vortex:vortex development frequency, f_burst:burst frequency, x/d:the distance of the plumb direction from the nozzle exit / Nozzle diameter). When f_burst is low, it becomes f_vortex>f_burst and becomes f_vortex < f_burst when f_burst is high.