Identification of flow structures in a closed chamber in the presence of a needle plasma actuator

This study deals with the experimental characterization of induced flow dynamics by a disk-needle-type plasma actuator driven sinusoidal generator and located in rectangular cross-section burner. Flow was performed using different actuation conditions standoff distances. Experiments were conducted under non-reactive conditions. Electrical carried out. Airflow behavior also analyzed smoke visualization. Smoke visualization showed dynamic plasma-induced flow. Post-processing high-quality images Proper Orthogonal Decomposition (POD) technique to recognize dominant vortexes coherent structures. could support design devices real combustors be useful for implementation numerical models. Moreover, it has been concluded that can controlled variation power or gap distance between two electrodes. Laser Droplet Velocimetry (LDV) used investigate distribution velocities turbulent kinetic energy (TKE) at values alternating current From POD LDV analyses, observed there is quite linear relation first mode maximum TKE. The method identify motions field carrying most TKE peaks are present area energetic structures, as identified POD.