Gnativ R. Development of scientific bases of prediction of hydraulic parameters of nonsteady-state streams in technological processes

Theoretical investigations of nonsteady-state flows have been conducted, a dissipative model which describes laminar, transient, and turbulent flow conditions has been formulated and used. A method of modeling the nonsteady-state streams of fluids in terms of physics and mathematics with taking into account 2-D of their flow has been created and scientifically substantiated; analysis of the influence of the inertion forces on the character of the flow by visualization method was also used. Laws of pressure and velocity distribution in nonsteady-state laminar and turbulent flows which take into account the peculiarities of the structure of the considered stream have been obtained. Factors and peculiarities of fluid flow which lead to non-stabilized flow have been studied. Fields of velocities of accelerated and decelerated streams have been experimentally investigated, local characteristics of those streams have been determined; the physical phenomenon as well as the physical model which are taken as the basis for creation of a mathematical model for non-steady streams calculation have been studied. New scientifically substantiated methods of calculation and prediction of hydraulic parameters of nonsteady-state stream are suggested; these methods take the calculation and prediction more exact. The results of this investigation are introduced into installations of technical water-supply system; these methods are also suggested for using them in calculations of protective systems in technological processes.