izmertechИзмерительная техникаIzmeritel`naya Tekhnika0368-10252949-5237ФГУП "ВНИИФТРИ"10.32446/0368-1025it.2020-7-34-42izmertech-1814Research ArticleМЕХАНИЧЕСКИЕ ИЗМЕРЕНИЯMECHANICAL MEASUREMENTSМетодика расчёта расхода криогенных двухфазных потоков в бессепарационных расходомерах на базе сужающего устройстваTechnique for flowrate calculation of cryogenic two-phase flows in Venturi flowmeters without separation.АрхаровИ. А.ArkharovI. A.

Москва

Ivan A. Arkharov

Moscow

arkharov@bmstu.ruКакоринИ. Д.KakorinI. D.

Дубна

Igor D. Kakorin

Dubna

kakorin@jinr.ruМосковский государственный технический университет имени Н. Э. Баумана (Национальный исследовательский университет)РоссияThe Bauman Moscow State Technical UniversityRussian FederationОбъединённый институт ядерных исследованийРоссияJoint Institute for Nuclear ResearchRussian Federation202012072023073442Copyright © ФГУП "ВНИИФТРИ", 20232023ФГУП "ВНИИФТРИ"ФГУП "ВНИИФТРИ"https://www.izmt.ru/jour/about/submissions#copyrightNoticehttps://www.izmt.ru/jour/article/view/1814

Предложена методика расчёта расхода криогенных двухфазных потоков в бессепарационных расходомерах на базе сужающего устройства. Предложенная методика учитывает уравнения состояния двухфазной среды, т. е. изменения плотности, массового паросодержания и температуры двухфазных потоков криоагентов в зависимости от давления в сужающем устройстве. Показано, что без учёта эволюции параметров потока возникает дополнительная погрешность определения расхода и, следовательно, невозможно корректно определить чувствительность и диапазон измерений расходомера. Выбран наиболее оптимальный диапазон измерений перепада давлений, а также предложен способ измерения расхода двухфазного потока по перепаду температуры на сужающем устройстве. Проблема определения расхода двухфазных криогенных потоков актуальна для ускорительной, аэрокосмической и газотранспортной техники.

A technique for calculating the flowrate of cryogenic two-phase flows in separationless flowmeters based on a venturi is proposed. The technique takes into account the equation of state of the two-phase medium, that is changes in density, mass vapour quality and temperature of cryogens two-phase flows against pressure in the venturi. It is shown that without an accounting of the flow parameters evolution, an additional flowrate error appears and therefore it is impossible to correctly determine the sensitivity and measurement range of the flowmeter. The most optimal measurement range of the pressure drop is chosen as well as a method of the flowrate measuring by the temperature difference across the venturi is proposed. The problem of determining the flowrate of two-phase cryogenic flows is topical for accelerator, aerospace and gas-transport engineering.

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The authors declare that there are no conflicts of interest present.