The paper presents the results of computational and experimental study of jet flows under loading of the hemispherical steel shell by explosion products. For two characteristic times, experimental radiographs are compared with X-ray patterns obtained by Monte-Carlo numerical simulation of the transmission of calculated gas-dynamic cuts of the object under study. The experiments are performed using X-ray facility based on linear induction accelerator LIA-20. The main elements and characteristics of the X-ray facility are given. Simulation was performed using GRAD and PRISMA software packages.

   The “Luch-Proton” project of the proton beam therapy center is being created at the National Research Center «Kurchatov Institute». The pulsed proton accelerator RFQ with energy of 5 MeV, operating frequency of 162.5 MHz and current of 30 mA is being developed at the National Research Center “Kurchatov Institute” – KKTEF as an injector of the proton synchrotron. The main aspects of RFQ beam dynamics are described choosing RFQ parameters, optimizing the transport and transmission of the accelerating channel, minimizing the output beam emittance. The results of beam dynamics simulation in RFQ are presented.

   The presented work shows the results of an experimental study of the structure of the flow separation over the wing of a small-sized aircraft with a leading edge and fuselage on the leeward and windward sides. Visualization images of the wall flow were obtained, followed by an analysis of these photographs and a comparison of the flow results on both sides. The flow structure studies were conducted at the critical angle of attack for the model used. Additionally, the study examined the influence of changes in the angle of sideslip and the deflection of control surfaces (elevons).

   Experimental results on the effect of weak shock waves on the laminar-turbulent transition in the supersonic boundary layer of a three-dimensional wing with a leading edge sweep angle of 45° at a Mach number of 2.5 are considered in the work. A pair of weak shock waves in the oncoming flow is created by a 2D unevenness. The 2D unevenness of surface had dimensions of 150 × 7 × 0.155 mm and was installed vertically on the side wall of the working part of the wind tunnel T-325 ITAM SB RAS. The measurements were made by the constant temperature anemometer. Experimental results show that weak shock waves influence the laminar-turbulent transition in the supersonic boundary layer of a three-dimensional wing and lead to early shear flow turbulization. The most powerful effect on the transition to turbulence in a supersonic spatial boundary layer is produced by a shock wave formed by the flow around a scarp from the trailing edge of a 2D unevenness. The second wave has almost no effect on the position of the transition. Effect of the cross flow on stationary vortices caused by the interaction of weak shock waves with the leading edge of a swept wing is also observed in experiments.

   The article discusses the features of the equilibrium conditions for the formation and dissociation of liquefied gas hydrates. Some known experimental data on the equilibrium conditions of hydrate formation for hydrocarbon systems are presented. The method developed by the authors for calculating the equilibrium thermobaric parameters of the formation of hydrates from a mixture of liquefied gases is described.

   This review article presents the results of the analysis of the features of the process of diffusion combustion of hydrogen during its outflow into the air space. The article considers works devoted to the experimental study of the features of diffusion combustion of a single hydrogen microjet depending on the outflow velocity and the ignition method. The results are systematized and expressed in dimensionless Reynolds numbers. The process of diffusion combustion of hydrogen during its outflow from nozzle devices providing independent coaxial air supply is also considered. Experimentally discovered scenarios of diffusion combustion of a hydrogen microjet surrounded by an air flow are considered, and the possibility of stabilizing the process of diffusion combustion of a hydrogen microjet by a coaxial air flow flowing out of a coaxially located annular gap is shown for the first time. The discovered useful effect, which allows maintaining hydrogen combustion under the influence of a water vapor flow, is also considered. The effect of “locking” the combustion process in a narrow cone-shaped region near the nozzle exit is considered during the interaction of hydrogen flowing out of an annular nozzle with a supersonic air jet flowing out of a coaxially located micronozzle. The established conditions and features of the interaction of two single hydrogen microjets are discussed.

   The temperature field of a three-layer thermoelement based on SiGe was studied in a non-stationary mode. Based on the analysis of the process, a mathematical model of unsteady heat transfer is proposed and justified. Analytical dependencies for the operation of a non-stationary temperature field are obtained. The temperature distribution in cylindrical layers has been studied. For each layer, thermal conductivity coefficients, Fourier criteria, Biot criteria, as well as the thermal emf coefficient are calculated.

   This paper presents the experience of developing and utilizing computer simulations for student laboratory assignments in atomic physics, specifically focusing on emission atomic spectra. The fundamental component of each laboratory assignment is a computer simulator of a spectrograph, which displays atomic line spectra on the monitor screen. The simulator operates by converting the wavelength of radiation into an RGB triplet. The configuration of setup parameters and experimental conditions is unique to each student conducting the laboratory assignment using the simulator. Individualized parameters, stored in Google Sheets, are transferred to the HTML template of the laboratory assignment via the Google Apps Scripts service. This individualization of simulator parameters serves to encourage students to engage in independent work.