Heterogeneous plasma from a combined discharge in a vortex argon + steam mixture flow with aluminum particles in the tube of a plasma vortex reactor is experimentally studied. The discharge, plasma and working flow parameters are measured, and the coefficient of energy conversion in the plasma vortex reactor is measured. The electron temperature, the rotational and vibrational temperatures of excited molecular complexes, the temperature of metallic clusters, and the plasma electron concentration are estimated by spectral methods. A kinetic system for calculating the working regimes in the reactor using a discharge in steam with aluminum particles is proposed. A vortex pure steam flow with aluminum particles in the presence of a heating source is numerically modelled. The spatial-temporal distributions of the flow parameters, such as velocity, temperature, and pressure, are obtained together with the molar concentration distributions of the discharge mixture components.

В [1] предложены основы технологии получения водорода с использованием реакции гидратации микропорошков металлов в разряде в парах воды. В данной работе построена кинетическая схема газофазных реакций, протекающих в таком разряде с микрочастицами алюминия при атмосферном давлении. Полная кинетическая схема плазмохимических реакций в разряде паров воды в присутствии металлических микро- и наночастиц включает значительное число реакций [2]. Каналы, определяющие баланс заряженных и нейтральных частиц, весьма разнообразны, и учет их всех делает численное моделирование структуры закрученного течения в плазме вихревого реактора чрезвычайно трудной задачей. Поэтому обычно разрабатывают ряд упрощенных кинетических схем, позволяющих рассчитать основные параметры.

The effect of twisting a near-wall gas flow around a cylindrical model induced by a magnetoplasma actuator on the external subsonic flow around this model has been studied.

Streamlining of a circular cylinder with a localized heat source modeling an MHD actuator in which the plasma arc channel moves along the cylinder surface under the action of the Lorentz force in a radial magnetic field is studied experimentally and simulated numerically. It is shown that the presence of a moving heat release region leads to a break in the symmetry in cylinder streamlining by the external flow and the appearance of a nonzero lift force and circulation.

Based on the results of numerical simulation of a nonstationary, nonaxisymmetric turbulent swirling gas flow in a tube with local sources of heat release, it is shown that a precessing vortex core (PVC) appears at supercritical values of the swirl parameter as a result of the development of instability of a left-handed bending mode. The dependence of the PVC frequency on the mass flow rate of the gas and the heat-source power has been studied. As the heat-source power increases, the frequency of precession grows while the amplitude of vortex core oscillations drops.

Conditions for the onset of transitions between corona and pinch types of one-electrode radiofrequency capacitive discharges in swirl airflow at atmospheric pressure have been analyzed. It is established that the transitions observed at various values of the gas flow rate and swirl parameter are related primarily to the gasdynamic structure of airflow. Calculated data obtained in the framework of a proposed theoretical model are qualitatively consistent with the available experimental data.

The influence of a heat release source with temperature-dependent power on the stability of a Rankine vortex has been studied. A condition for the formation of a radially convergent swirling flow with increasing vorticity is found for a medium with a positive feedback between nonequilibrium heat release perturbations and the pressure at the vortex core.

Experimentally observed features in the formation of glowing zones in gas discharge at various mass flow rates are qualitatively explained based on the numerical simulation of a turbulent swirling flow with a local source of heat release.