Khoryev O. Increasing the effectiveness of runners in radial-axial hydro machines by mathematical modeling of fluid flow in the flowing part

The research object - process of power interacting of a fluid stream with the runner of radial-axial hydromachines. Purpose - increase of efficiency of setting of radial-axial hydromachines at the expense of decrease of hydraulic losses in the runner on the basis of optimization of its geometrical parameters. The methods of research - methods of mathematical and physical modelling of working process of hydromachines, methods of the solution direct andinverse problem of a flow of a blade cascade and methods of optimization. Scientific novelty - on the basis of the developed geometrical model of the setting and model of flow is developed a technique, allowing to automize process of projection blade systems of runner of radial-axial hydromachines; the technique of modelling of agency of geometrical parameters of runner of radial-axial hydromachines on them energetic and cavitation parameters has received the further evolution; For the first time dependences which represent agency of the basic geometricalparameters of runner of the hydromachine on a predicted performance are received and allow to optimize energetic and cavitation parameters. Results - are developed complexes of programs for design of runner of radial-axial hydromachines and predictions of their performances; it is received quantitative and quality standard of agency of geometrical parameters bladesystems of runner of hydromachines on energetic and cavitation that enables to minimize hydraulic losses at a design stage of the setting. The degree of implementation - faculty of hydraulic machiner NTU "KhPI", Open Society "Turboatom", OJS "Kharkovturboengineering". Application area - hydroturbines construction