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Information × Registration Number 0223U000976, 0122U000798 , R & D reports Title Investigation of ejection and thermodynamic properties of supersonic flows in limited volumes popup.stage_title Head Voropaiev Hennadii O., Доктор фізико-математичних наук Registration Date 23-01-2023 Organization The Institute of Hydromechanics of the National Academy of Sciences of Ukraine popup.description2  Based on a series of hot gas flow calculations in an axisymmetric ejector and a detailed parametric analysis of the obtained numerical results, the geometric parameters of the improved ejector model, which provides an ejection coefficient of about 6, were proposed, and detailed design drawings of the developed model were made. The processes of the formation of a wall supersonic jet, its ejection properties and the structure of compaction jumps on the walls of the mixing chamber of an axisymmetric ejector, depending on the value of high pressure, were studied; the causes and conditions of the instability of the supersonic jet in the exit section of the ejector are determined and the influence of this instability on the efficiency of the ejector is estimated. The thermodynamic processes in the forechamber of the ejector during the interaction of the supersonic jet with the wall were studied, the optimal geometric parameters of the forechamber were determined, which ensure effective throttling of high pressure under the condition of ensuring the necessary mass flow rate of the ejecting gas. A flexible multi-functional experimental complex has been created that allows you to adequately investigate the processes of filling a car airbag with cold air, which simulates the use of pyrotechnics and makes the experiment much safer and cheaper. The obtained experimental data are in good agreement with the calculated ones, both in terms of airbag inflation and ejection coefficient, as well as in terms of frequency characteristics. Product Description popup.authors Vynohradsky Pavlo Mykhailovych Dimitrieva Natalia F. Zagumennyi Iaroslav V Korobov Vitalii I Paramonov Yuriy О. Rozumnyuk Natalia V. Sirosh Olena O. Cymbal Volodymyr Semenovich Shkvar Eugene O. Yurchenko Nina F. popup.nrat_date 2023-01-23 Close