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Information × Registration Number 0305U003796, 0102U001751 , R & D reports Title Study of increasinng efficiency of gas flow energy utilization and the mecanisms of multyphase flow control popup.stage_title Розробка математичної моделі та програмного забезпечення для розрахунку двомірної нестаціонарної нерівноважної течії хімічно-реагуючої газової суміші в газодинамічних трактах паливних пристроїв та в струменях з урахуванням впливу в'язкості. Розвиток підходів до чисельного моделювання просторових турбулентних течій газу в робочих колесах відцентрових компресорних ступенів. Експериментальні дослідження течії в газодинамічних трактах паливних та струменевих пристроїв. Head Timoshenko V.I. and Kovalenko N.D., Registration Date 14-07-2005 Organization Institute of Technical Mechanics NASU and NSAU popup.description2 Research objects are non-equilibrium flows of chemically active gas mixture in burner gas dynamic sections and in jets, centrifugal compressor stages of the aviation gas turbine engines, jet grinders of solid loose materials. Work aims are the development of the mathematical model and software to calculate two-dimensional transitional non-equilibrium flow of chemically active gas mixture in burner gas dynamic sections and in jets with taking viscosity into account; the improvement of the developed earlier approach to numerical modeling of gas turbulent flows in areas with the complicated shape to the flows in centrifugal compressor stages of the aviation gas turbine engines; preparations and testing work to determine local characteristics of the various nature loose materials jet grinding. Used techniques are the numerical modeling of chemically active gas mixtures flows and spatial turbulence gas flows on the basis of averaged Navie-Stocks' equations and their approximations with the turbulence differential models use; experimental studies and design-exploratory works. The obtained results: - the mathematical model to calculate two-dimensional transitional non-equilibrium flow of chemically active gas mixture in the jet or in the burner gas dynamic section with taking viscosity influence into account has been developed. The integration of the transitional differential equations system for the "narrow" channel in partial derivatives on the basis of the split on physical processes method has been applied in the algorithm with use of the finite-difference scheme of the second order for the spatial displacements and of the first order for time. Calculations of the state flow in the pipe for the simplest kinetical model describing hydrogen burning in the air have been made by the assignment method. The estimation of the influence of the cycling methane inlet into the burning chamber at the time of its burnout has been carried out; - the brief description of the Navie-Stocks' equation, the energy equation and turbulence model equations numerical solution approach with use of increase accuracy scheme is given. Boarder conditions complex is formulated for the problem of spatial turbulence flow in blade channels of compressor centrifugal stages. Results of numerical modeling of airflow in working wheels of centrifugal compressor stages for the aviation gas turbine engines at various operational regimes are given. The features of calculation pictures for the considered stages work regimes are analyzed. The comparison of calculated energy characteristics of the centrifugal wheel with the existing test data is made; - technical documentation for the putting in the operation experimental device of solid loose materials jet grinding USI-20 has been developed. Installation-debugging work has been fulfilled and required characteristics of jet grinding process have been obtained. The necessity to heat the working body (air) for some technological processes using ultrafine materials has been stated. Test studies of various nature solid loose materials grinding have been carried out. The conclusion on the possibility of ultrafine grinding for various nature solid loose materials with wide range of physical properties, in particular, hardness, thickness, viscosity, has been made. The necessity of jet grinding parameters individual setup in dependence on material physical properties has been shown. The advisability of loose materials anti-jet grinding with the ring injector use has been stated. Test studies have been made with the flow visualization in the area of loose material capture and transfer by the air ring jet. The supersonic jet high carrying capacity at satisfactory for the jet grinding operation properties of loose material with working body jet mixture has been stated. The application areas are the aeronautical and rocket-space engineering, power engineering, propulsion engineering. Product Description popup.authors popup.nrat_date 2020-04-02 Close