Dielectric barrier discharge influence on the gas-dynamic parameters of the plasma jet formed by this discharge
The paper presents the results of experimental gas-dynamic studies using the PIV-method of plasma jets formed by a coaxial barrier discharge in an argon flow at atmospheric pressure. The discharge was supported by a sinusoidal voltage with a frequency of 90 kHz. It is shown that periodic breakdowns created by a barrier discharge in the flow initiate the laminar flow transition into a turbulent regime even at low Reynolds numbers. The results obtained by the PIV method revealed that a strong BR significantly increases the turbulent diffusion coefficient in the initially turbulent flow. It is established that the maximum length of the plasma jet on which its plasma-chemical activity is conserved is determined not only by the initial velocity of the jet, but also by the degree of its expansion.