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Information × Registration Number 0221U100841, 0120U101147 , R & D reports Title Controlling the ejecting property of a pulsed supersonic annular jet in variable backpressure conditions popup.stage_title Head Voropaev Genadiy O., Доктор фізико-математичних наук Registration Date 09-01-2021 Organization Institute of Hydromechanics of NAS of Ukraine popup.description2  The object of research is supersonic wall flows of a compressible medium in a limited volume and their ejection capacity. The main goal is to study the interaction of a pulsed supersonic jet with a stationary medium in limited volumes of arbitrary shape using methods of direct numerical simulation of nonstationary turbulent flows of a viscous compressible fluid, as well as verification of theoretical results by experimental studies. The research method is a physical and numerical experiment. The relevance is due to the wide range of uses of equipment and devices that use the effects of ejection in the interaction of supersonic jets with the subsonic environment. The content of the work is to study the influence of the geometry of supersonic pulse ejectors on the ability to maintain their ejection properties with increasing back pressure. The method and algorithms for calculating the nonstationary three-dimensional supersonic flow in a limited volume were adapted to determine the characteristics of transonic viscous compressible flows without allocating density jumps. The ratio of the jet pulse, the parameters of the nozzle and the amount of ambient gas captured by the jet was determined, depending on the geometry of the limited volume and the increase in pressure in it. Based on the obtained results of numerical modeling, the geometries of modified ejectors capable of maintaining ejection properties at significant back pressure were determined, which will be used to make test models and conduct experimental research in the laboratory of the Institute of Hydromechanics of NAS of Ukraine. Product Description popup.authors Vynohradskii Pavlo M. Dimitriieva Natalia F. Zahumennyi Yaroslav V. Korobov Vitalii I. Paramonov Yurii O. Rozumnyuk Natalia V. Sirosh Olena O. Shkvar Eugene O. Yurchenko Nina F. popup.nrat_date 2021-03-17 Close