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Information × Registration Number 0207U006349, 0102U001751 , R & D reports Title Study in the ways of increasing the effective use of the gas flow and mechanisms for controlling the multi-phase flows popup.stage_title Head Timoshenko V.I. and Kovalenko N.D., Registration Date 25-04-2007 Organization Institute of Technical Mechanics of NASU and NSAU popup.description2 Research and methodic support is developed to calculate parameters of 3-D turbulent gas flows in compressor stages and air intakes of aircraft gas-turbine engines (GTEs) based on the Navier-Stokes full averaged equations and the k-e model of turbulence. The results of a numerical simulation of 3-D turbulent gas flows in the following elements of aircraft GTEs are given: two various-geometry air intakes for an aircraft turboprop engine; n impeller of a transonic axial compressor stage; impellers of the three supersonic fan stages; a high-loaded centrifugal compressor impeller; an input guiding device and an impeller of a centrifugal compressor stage. It is shown that the developed research and methodic support allows to study a complicated flow pattern in elements of aircraft GTEs using the calculations and to predict their power characteristics with reasonable exactness. A more refined version of the theory of isoentropic gas processes is presented, allowing to correlate well with experiment. It isshown that distinction from an isoentropic approxi-mation can be taken into account by variation in an expo-nent of a power in the equation of state of a process. The studied ways of decreasing in consumption of energy and improving the reliability of elements for gas-jet grinding loose solids demonstrated the prospects of using a gravitational classificator and ring-type working-medium injector.The work is performed to bring into operation the USI-20 experimental set and the working medium heater for gas-jet grinding loose solids. The experiments are made and rational lines for superfine gas-jet grinding loose solids of various nature and over a wide ranges of physical properties, in particular, the hardness, the density and the viscosity are proposed. The necessity of individual setting parameters for jet grinding with physical properties of materials is shown. The various complexity mathematical models are built for description of process in combustion of an air-carbon homogeneous mixture. They use the kinetic models of combustion with optimal systems of chemical reactions. The process of air-methane combustion in reaction spaces, gasdynamic passages and jets is studied by using the developed software and methodic support with the aim to intensify this process and minimize of environmental dangerous escapes. The result obtained can be used in calculations of local and integral characteristics of gas flows in intake devices and compressor vane channels for today's aircraft GTEs for the purpose of evaluating their aerodynamic improvement. The results of studies in the heat-power device and the process of gas-jet grinding are used in designs of new technological processes. Applications: aircraft and rocket and space industries, power engineering, engine manufacturing, industrial heat engineering, metallurgy. Product Description popup.authors popup.nrat_date 2020-04-02 Close