ON THE METHODOLOGY OF VORTEX STRUCTURES IDENTIFICATION IN FREE PLASMA FLOWS

摘要

The vortex structures in free plasma flows are identified using the information on the radiation intensity scanned in two mutually perpendicular directions by the CCD camera, The method is based on the assumption that a dominant heat flow vector around the jet core is proportional to the product (hv), where h is the enthalpy of volume unit and v the velocity of the medium. The method developed in the kinetic theory of gases is adjusted for determination of components of the heat flow vector including its rotation. The evolution of radiation intensity and dynamics of vortex structures in both the axial and radial direction about the jet's core are captured using the series of 8 shots within time interval of 100 μs. The analysis of vortex structures dynamics at flow rates 25 slm and 50 slm and electric current 150 A and 200 A is presented.