Atomic and Molecular Physics, and Optics, Aerospace Engineering
91
Scopus Publications
Scopus Publications
Experimental Study of Radiation Characteristics of Air behind the Front of a Strong Shock Wave P. V. Kozlov, I. E. Zabelinskii, N. G. Bykova, V. Yu. Levashov, G. Ya. Gerasimov Fluid Dynamics, 2026 Abstract The results of measurements of the radiation characteristics of air behind a strong shock wave in the DDST-M double-diaphragm shock tube at the Institute of Mechanics of Moscow State University are given. The measurements were performed at an initial pressure of 0.25 Torr in the driven section and shock wave velocities of up to 11 km/s. The shock tube radiation recording system made it possible to record absolute values of the time-integrated spectral density of radiation in the wavelength range of 190–1100 nm and observe the time evolution of radiation in a selected narrow spectral interval in a single experiment.
Numerical Experiments in a Shock Tunnel with Intermediate and Detonation Chambers P. V. Kozlov, V. Yu. Levashov, Yu. V. Tunik Fluid Dynamics, 2025 Abstract The study is aimed at developing a numerical counterpart of a three-chamber shock tube. The shock tube of the Institute of Mechanics of Moscow State University, which is started up by means of burning oxyhydrogen mixture in a high-pressure chamber, is chosen as a real prototype. The model is based on the time-dependent two-dimensional Navier–Stokes equations governing axisymmetric flows of a multicomponent reacting gas with account for diffusion. Test problems of the initiation of high-speed shock waves in air are formulated and solved numerically. The calculations are performed for the combustion of oxyhydrogen mixture in the regimes of both conventional and detonation combustion. It is shown that the proposed digital model of a three-chamber shock tube allows one to obtain results similar with the experimental data, when burning an oxyhydrogen mixture in the mode of conventional combustion. According to the calculations, detonation combustion of an oxyhydrogen mixture increases the velocity of the generated shock waves in all chambers of the setup.
Study of the Characteristics of Shock-Heated Gases on the EKUD Experimental Complex P. V. Kozlov, I. E. Zabelinskii, N. G. Bykova, V. Yu. Levashov, G. Ya. Gerasimov, M. A. Kotov Fluid Dynamics, 2025 Abstract The results of studies conducted at the EKUD experimental complex of the Institute of Mechanics of Moscow State University over the past ten years are analyzed. They include primarily the radiation characteristics of shock-heated gases measured in a wide range of wavelengths (λ = 115–1100 nm) at shock wave velocities up to 11.4 km/s and the gas pressure in front of the shock wave of 0.25 Torr, as well as the ignition characteristics of combustible mixtures based on hydrogen, propane, and propylene obtained at both low (T ≤ 1000 K) and high (T ≥ 1000 K) temperatures. Electron concentrations in the low-temperature plasma in the vicinity of a strong shock wave were measured.
Development of the P-2000 Facility and Key Results Achieved on It A. P. Glinov, A. P. Golovin, P. V. Kozlov Fluid Dynamics, 2025 Abstract This paper provides a brief overview and clarification of the main results obtained over the past ten years at the P-2000 facility. The current data on the development of electric discharge stands of this installation are provided. The possibilities of using these stands for various applications are considered.
Extended High-Current Arc Discharges in an External Magnetic Field in Gas Media A. P. Glinov, A. P. Golovin, P. V. Kozlov Fluid Dynamics, 2025 Abstract Extended (up to several tens of centimeters) high-current (hundreds of amperes) electric arcs in various gases at the atmospheric pressure are studied experimentally and theoretically. Such discharges have been studied on the electric discharge stand of the P-2000 facility of the Institute of Mechanics of Moscow State University. The data on the influence of an external magnetic field on the stability of such discharges and the formation of branched current channels are clarified. One of the areas of the research is the study of the effect of the orientation of the magnetic field imposed on the arc on the processes of development of the discharge in various gas media, such as air, CO2, Ar, and N2. The data for argon and nitrogen are presented most fully. The experiments were carried out in a chamber with transparent walls. The calculation and the theoretical study are carried out on the basis of an electrical engineering model using the empirical data on the volt-ampere characteristics of arcs between graphite electrodes. It is found that the stability of high-current arcs is significantly affected by electrode jet-flame dynamics. At the same time, the traditional models of arcs in the external magnetic field without taking these factors into account show that the direction of the external axial field does not affect the stability of the arcs, affecting only the direction of their twisting during the development of helical instability.
Experimental Research of Heat Fluxes in Wind Tunnels and Shock Tubes P. V. Kozlov, S. S. Popovich, A. G. Zditovets, I. A. Zagainov Fluid Dynamics, 2025 Abstract The article describes the methods and results of the study of heat transfer in a wind tunnel and shock tubes in the presence of shock waves. In the first case, the research is carried out using a thermal imager and infrared observation windows, which allow us to determine the patterns of heat transfer on the inner walls of the wind tunnel. The study is carried out for the Mach number 2.48 and the turbulent flow regime. The shock wave is created using a plane wedge mounted on the upper wall of the setup test section. A high-speed thermoelectric detector with a resolution of up to 1 microsecond is used to study heat fluxes in the shock tubes. The experiments are carried out on two diaphragm-type shock tubes at the postshock Mach number of 15.
Experimental and Theoretical Studies on the Absorption Properties of Shock-Heated Oxygen N. G. Bykova, I. E. Zabelinskii, A. L. Kusov, G. Ya. Gerasimov, V. Yu. Levashov, P. V. Kozlov Fluid Dynamics, 2025 Abstract A series of experiments are conducted with the use of a shock tube at the Institute of Mechanics, Moscow State University to determine radiation absorption spectra in shock-heated oxygen in the wavelength range of 213–260 nm at a gas pressure of 1 Torr and shock wave velocities ranging from 3.4 to 4.5 km/s. Based on a comparison of the experimental data with the results of calculations using a spectral-kinetic model, the effect of bound–bound and bound–unbound transitions in the Schumann–Runge system on the absorption properties of oxygen is analyzed.
Simplified Kinetic Model of Kerosene Combustion G. Ya. Gerasimov, Yu. V. Tunik, P. V. Kozlov, V. Yu. Levashov, I. E. Zabelinskii, N. G. Bykova Russian Journal of Physical Chemistry B, 2021
Experimental investigation of the oscillating deactivation of molecules of CO in supersonic gas flow Izvestiya Akademii Nauk Mekhanika Zhidkosti I Gaza, 2000
Diagnostics possibility of methane containing mixtures using the nonlinear IR spectrograph... Izvestiya Akademii Nauk Ser Fizicheskaya, 1996
Use of CARS spectroscopy to study excitation and deactivation of nitrogen molecular vibrations in a supersonic gas stream Technical Physics, 1996
Absorption of 3.3 μm radiation by methane heated in a shock wave Technical Physics, 1996
Investigation of relaxation phenomena in shock-heated gas and supersonic flow by single-shot CARS Proceedings of SPIE the International Society for Optical Engineering, 1996
Spectroscopy of shock-heated methane using nonlinear IR spectrography Proceedings of SPIE the International Society for Optical Engineering, 1996
PULSED OPTICAL EFFECTS ON NEAR-ELECTRODE PROCESSES. Moscow University Physics Bulletin English Translation of Vestnik Moskovskogo Universiteta Fizik, 1986
