K. N. Volkov

Aerooptic Effects in a Turbulent Flow and Their Simulation

Large-scale eddies and related aerooptic effects in a turbulent boundary layer, free mixing layer, and a jet flowing out of a round nozzle into a submerged space are simulated. The results obtained are used to analyze the distortions produced in the phase function of a coherent light beam by the turbulent fluctuations of the parameters of the medium. The results of numerical calculation are compared with the data of natural experiment and data obtained by solving Reynolds-averaged Navier-Stokes equations.

Influence of Turbulence on the Deposition of Particles from a Gas‐Dispersed Flow on the Wall

Simulation of the scattering and deposition of dispersed‐phase particles in the region of interaction of a turbulent flow with an obstacle is considered. The regimes and distinctive features of deposition of particles in the vicinity of a critical point are investigated under different conditions. The sedimentation coefficient of the impurity is calculated as a function of the parameters of unperturbed flow and the particle size. The results of the calculations are compared to the data obtained without allowance for the influence of the fluctuations of the carrier‐flow velocity on the motion of the impurity.

Scattering and Heat Exchange of Disperse Impurity Particles in Turbulent Nonisothermal Gas and Low‐Temperature Plasma Jets

This paper considers issues connected with the simulation of the motion and heat exchange of disperse impurity particles in nonisothermal gas and low‐temperature plasma jets under the action of turbulent pulsations of the carrier flow. The influence of the outflow conditions, the initial parameters of the phases, and the conditions of particle injection into a jet flow on the laws of impurity scattering and heat exchange are investigated. The results of the numerical calculations are compared with the data obtained without taking into account the influence of turbulent pulsations on the particle motion.

Aero-optic effects in turbulent flows

Large-scale vortices and related aero-optic effects in a turbulent boundary layer, a free mixing layer, and an underwater stream have been mathematically simulated. The results are used for the analysis of distortions in the wavefront-phase function of a coherent light beam, which are induced by turbulent fluctuations in the parameters of the medium. The results of numerical calculations are compared to the experimental data and to a solution of the Reynolds equations.