Тези доповідей, матеріали конференцій
Постійне посилання на розділhttps://dspace.nuft.edu.ua/handle/123456789/7373
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Документ Determination of the ejection coefficient of a jet apparatus with a conical-cylindrical mixing chamber(2023) Tymchenko, Ivan; Ponomarenko, Vitalii; Lementar, Sviatoslav; Yakobchuk, Roman; Liulka, DmytroEjectors have found wide application in various industries due to their simplicity, unpretentiousness to operating conditions, absence of tribological problems, etc. Their main drawback is related to the low efficiency, which is at the level of about 30%. The need to improve operational characteristics led to the creation of an innovative ejector with a combined mixing chamber (initial conical and subsequent cylindrical parts). A mathematical model based on balance equations is proposed for the possibility of determining the ejection coefficient (the main flow rate characteristic) when designing or auditing equipmentДокумент Liquid jet gas ejectors: designs of motive nozzles, performance efficiency(2019) Ponomarenko, Vitaliy; Dimitrov, Tsvetan; Sliusenko, Andrii; Liulka, Dmytro; Forostiuk, InnaДокумент The research of a one-step and two-step ejector with a compact and dispersed jet of liquid(2017) Ponomarenko, Vitaliy; Liulka, Dmytro; Dimitrov, Tsvetan; Lementar, Sviatoslav; Khitriy, Yaroslav; Perekrest, NataliThe work of the jet sulphitator ejector of sugar production is analyzed. The tests of a gas-liquid ejector with a compact and dispersed liquid jet in a wide range of changes in geometric characteristics (1.3 ... 11.25) were tested on the test-bench at the laboratory and the range of their optimal values (4 ... 7), which allowed to reach the maximum ejection coefficient, was found experimentally. The ejection coefficient for an ejector with a compact liquid jet is 15 ... 20% lower than for an ejector with a dispersed jet at the same flow rates.The design of a new two-stage ejector with improved expendable characteristics is offered, the basic geometric dimensions are justified. An increase of the ejection coefficient without additional energy penalties is experimentally proved. The field of application of the offered design ejector is not limited to food industry and it is recommended to use in those cases where heat-mass transfer processes take place.