This article is devoted to study of the condensation process in nozzles with a large degree of expansion.The flow of an inviscid gas in axisymmetric nozzles and jets is numerically simulated based on a quasi-two-dimensional nonstationary approximation.Two approaches to the modeling of condensation processes are considered: the kinetic method and the moment method.The two-phase medium is a multi-component gas (carrier gas and vapor of a condensable substance) and clusters (droplets) of a condensable substance.The gas phase and the droplets are in mechanical equilibrium.The results of test calculations for the condensation of water vapor in shock tubes and nozzles and the results of calculating the condensation of water in the nozzle of a hypersonic shock tube are presented

Non-stationary plane shock wave interaction with localized nanosecond-lasting surface discharges was investigated. Pulse discharge plasma glow evolution was recorded with a CCD camera and gas flow evolution was recorded with laser shadowgraphy. CFD simulations of pulse energy deposition near the horizontal wall surface in front of the shock wave were carried out. Non-stationary 2D symmetrical flow dynamics were studied and analysis of the instantaneous surface discharge energy rate through CFD and shadow images matching was carried out.