V. A. Levin

Influence of Surface Microwave Discharge on the Characteristics of Supersonic Flow near Streamlined Body

In the report physical processes which are taking place in the microwave discharge on external surfa ce of dielectric body being flown around of supersonic stream of air and in plasma of the volumetric freely localized microwave discharge were investigated. It is shown, that different types of microwave discharges can find application in aerodynamics for reduction of skin friction , for flow control and for plasma assisted combustion.

An Axisymmetric Electric Discharge as a Means for Remote Heating of Gas and for Ignition of Combustible Gas Mixture

Experimental and theoretical investigations are performed of gasdynamic phenomena accompanying a ring electric discharge excited in air at atmospheric pressure. It is experimentally demonstrated that the discharge generates a toroidal (three-dimensional) shock wave which cumulatively converges toward the axis. A mathematical model is constructed, which describes the process of focusing of the toroidal shock wave. The results of measurements of shock-wave processes accompanying the discharge are in good agreement with the calculation results; this enables one to estimate the gas temperature which may be attained in the region of cumulative convergence at some distance from the ring center. Results are given of first experiments in the excitation of a ring shock wave in a combustible gas mixture (stoichiometric mixture of CH4:O2).

Simulation of ignition of a supersonic flow of a propane-air mixture by electric discharge

The numerical simulation of the ignition process of a supersonic flow of a preliminary mixed propane-air mixture by electric discharge, with respect to power, geometry, and the duration of energy input, was carried out via a two-dimensional thermo-chemical model. The ignition thresholds evaluated in the framework of this model were in agreement with the experimental values of power density and induction duration.