INTERACTION OF SUPERSONIC TWO-PHASE FLOW GAS+SOLID PARTICLE WITH OBSTACLE AND FORMATION OF SOLID-PHASE COVERS

Abstract

The processes of interacting supersonic two-phase flow (gas+solid particle) with obstacle surface were investigated for a purpose of determining a possibility to apply the covers for particles in the solid state at temperature of the working gas deceleration near to the room one. The stand of the experimental plants with a possibility to change the flow parameters and, specifically, velocites of the particles within the limits of 200 - 1,200 m/s has been created; the optic systems of the laser diagnostics for determination of the two-phase flow parameters have been created. The data about velocity unequibrium at acceleration of the two-phase flow in the supersonic nozzles have been obtained, the particle resistance coefficient depending on the Mach and Reynolds number has been determined. The value of the critical concentration in the particles (volumetric), difficulty leading to the change of the flow parameters has been specified. At flowing of the bodies, the body resistance decrease effect and also the effect of forming cover on the body surface have been explained, the procedure of the "cold" gasodynamic deposition (CGD) has been proposed. The CGD method bases, properties of the covers and the realization field have been investigated.Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio