Fuel atomization and mixing in unsteady swirling flows behind the gas-dynamic stabilizer

Features of fuel atomization and propagation in the flow behind a gas-dynamic stabilizer are considered. Estimations of the influence of transverse jets impulse magnitude on characteristics of mixing behind the stabilizer are obtained by numerical and experimental methods.     

On the analysis of electric arc process stability in plasma systems of ignition with allowance for GTE combustion chamber parameters

An approach to the analysis of electric arc process stability in plasma systems of ignition is considered depending on the ignition system power circuit parameters, speed of plasma-generating air, and combustion chamber inlet pressure. Also solved is the problem on determination of the calculated value of the maximum admissible speed of plasma-generating air that corresponds to the critical regime of stable arcing in plasma spark plug at the GTE start.     

Microindentation of plasma zirconia-based thermal barrier coatings

A technique of evaluating the micromechanical characteristics (namely, microhardness, microdurability, microbrittleness and static crack resistance coefficient) using microindentation as applied to plasma zirconia-based thermal barrier coatings is presented.     

Generalization of experimental data on two-phase critical efflux through axisymmetric channels

The results of studying the characteristics of a two-phase flow being formed during adiabatic water efflux through axisymmetric cylindrical and Laval nozzle channels are presented. Experiments were carried out with saturated water in the range of initial pressures 0.6–4.0 MPa. The fluid efflux was performed into the air with atmospheric pressure. The generalizing relations for calculating thrust pulse and critical flowrate were obtained.     

Spectral properties of backscattered solar Ly-α radiation in the heliosphere: A search for heliospheric boundary effects

We explore the imprints of the solar wind interaction with the local interstellar medium on spectral properties of backscattered solar Ly-α radiation. We employ a newly developed effective model for the interstellar H atom velocity distribution function in the heliosphere ( Katushkina and Izmodenov, 2011). The model takes into account both global effects of H atom perturbations at the heliospheric boundaries and local (i.e. within 10–20 AU from the Sun) effects of the solar ionization, charge exchange, solar gravitation and radiation pressure.     

Numerical simulation of a boiling up fluid flow in the variable cross-section channels

A physical and mathematical model of a boiling-up fluid flow in the variable crosssection channels is proposed. The numerical model is based on the solution of the Navier-Stokes nonstationary equations for compressible fluid by the implicit finite-difference method. We present the results of the numerical modeling for two-phase flow characteristics at the initial stage of the evaporation process and the steady-state quasistationary flow of a two-phase medium.     

Studying the positioning accuracy for dynamic (moving) objects with the use of multifrequency oblique-incidence sounding of ionospheric radio channels by chirp signals

The paper presents the methods and algorithms for positioning the dynamic (moving) objects using the oblique-incidence ionospheric sounding by chirp signals. Full-scale experiments have been performed to determine a distance to an object and its location.