Published in Fluid Dynamics
Abstract—Experiments on heat transfer to a graphite specimen in supersonic underexpanded high-enthalpy nitrogen jets are conducted in the VGU-4 HF plasmatron of Institute for Problems in Mechanics of the Russian Academy of Sciences at the pressure in the low-pressure chamber of 8.5 hPa, the gas flow rate through the discharge channel of 3.6 g/s, an...
Published in Fluid Dynamics
Abstract—The processes of heat transfer and air ionization in gas flow in the neighborhood of blunt plates of bluntness radii Rn = 0.2 and 0.66 cm are simulated numerically over a wide free-stream-parameter range. The temperature fields of the translational and vibrational degrees of freedom of molecular components and the number densities of atomi...
Published in Fluid Dynamics
Abstract—For the purpose of studying the interrelation between the statistical characteristics of waves on the water surface and the laws of their variability the histograms are constructed and the cumulants and spectra are calculated for mechanical and wind waves in a wind-wave channel. The diversity of the histograms for the waves of different na...
Published in Fluid Dynamics
Abstract—Flow of the thin layer of a nonlinearly viscous fluid subject to the gravity force down an inclined plane is considered. The capillary forces are assumed to be significant and rheology is described by the power law. The effect of a small periodic topography applied to the plane on the characteristics of steady-state flow and its stability ...
Published in Fluid Dynamics
AbstractWe consider a steady submerged laminar jet of viscous incompressible fluid flowing out of a tube and propagating along a solid plane surface. The numerical solution of Navier–Stokes equations is obtained in the stationary three-dimensional formulation. The hypothesis that at large distances from the tube exit the flowfield is described by t...
Published in Fluid Dynamics
Abstract—The results of numerical simulation of the interaction of supersonic flow with a permeable screen in form of an infinite plane cascade (lattice) of circular cylinders are given. The interaction regime in which the shocks ahead of the cylinders are localized on the scale of the cascade step is considered. The multi-block computational techn...
Published in Fluid Dynamics
AbstractThe mathematical model of barotropic gas flow based on the two-layer flow representation with the regions of supersonic core and near-wall boundary layer is applied to the description of shock-wave structures in channels and nozzles of variable cross-section. The unsteady pseudoshock model is written in the form of the system of five inhomo...
Published in Fluid Dynamics
Abstract—A numerical solution of the Prandtl boundary layer equation for a steady plane incompressible flow at a given pressure gradient is derived. The gradient is determined by the well-known Rankine solution describing flow past a half-body. The contour of that body is obtained by means of superimposing a uniform flow on the point source flow. I...
Published in Fluid Dynamics
Abstract—We consider a plane problem on the evolution of perturbations of the surface of an ideal incompressible fluid of finite depth caused by a deep pulsating point source that begins its work in an initially undisturbed medium. The process of establishing surface waves propagating symmetrically in both directions from the source is described. T...
Published in Fluid Dynamics
Abstract—Water injection into a high-temperature geothermal reservoir saturated with superheated vapor is investigated. The stability of the phase transition front moving at constant speed is investigated by the normal modes method. Numerical study of the obtained dispersion equation is carried out. At different values of the main parameters, the d...
