Vortex Control by Non-Equilibrium Plasma

Abstract

Study of a longitudinal plasmoid in swirl flow is very important both for plasma aerodynamics and extra energy release 1-8, 10 . A longitudinal heterogeneous plasmoid structure and its dynamics in the swirl flow were studied in our previous works in detail 1-6 . The present work is a continuation of the previous ones. The non-equilibrium combined discharge (DC discharge + HF discharge) is used in this experimental work. A pulsed repetitive power pumping in the swirl flow is created by the combined discharge. The plasma created by this discharge can disturb the initial swirl flow. Plasma and airflow parameters are measured by different diagnostic instrumentation including a high-speed camera, electric and current probes, an optical spectrometer and etc. Following main new experimental and theoretical results are obtained in this work: a velocity distribution and a gas temperature distribution are measured in the swirl flow at different discharge and gas flow parameters. Detail optical spectra with a high resolution in a vortex longitudinal plasmoid created by the combined electric discharge are obtained. Processing of these spectra gives an important information about nonequilibrium processes inside the longitudinal plasmoid in the swirl flow. Obtained results are used in a theoretical model of plasma and a chemical kinetics in the vortex heterogeneous plasmoid created by the non-equilibrium DC discharge. Numerical results on a swirl flow structure and its evolution at plasma on are obtained and compared with experimental results.