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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">izmertech-864</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕХАНИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MECHANICAL MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Учёт фазовых переходов при воспроизведении газожидкостных потоков - путь совершенствования эталонов расхода многофазных потоков</article-title><trans-title-group xml:lang="en"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тонконог</surname><given-names>М. И.</given-names></name></name-alternatives><email xlink:type="simple">mikhail.tonkonog@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Левин</surname><given-names>К. А.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шабалин</surname><given-names>А. С.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макаров</surname><given-names>В. А.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фишман</surname><given-names>И. И.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Всероссийский научно-исследовательский институт расходометрии</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>11</issue><fpage>36</fpage><lpage>41</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/864">https://www.izmt.ru/jour/article/view/864</self-uri><abstract><p>Рассмотрена проблема влияния фазовых переходов газожидкостного потока на точность воспроизведения стендами расхода газожидкостной смеси при высоких давлениях. Предложен способ расчёта фазового равновесия смеси воздуха и заменителя нефти Exxol в различных концентрациях с использованием уравнений состояния и фундаментальных положений термодинамики. Получены коэффициенты бинарного взаимодействия заменителя нефти Exxol и основных компонентов воздуха: азота, диоксида углерода, кислорода и аргона. Приведены экспериментальные и расчётные значения давления насыщения смесей воздуха и Exxol различных концентраций. Показано, что отсутствие учёта фазовых переходов существенно искажает информацию о получаемых на стенде параметрах воспроизводимого потока многофазной смеси.</p></abstract><trans-abstract xml:lang="en"><p>Influence of phase transition between gas and liquid phases of gas-liquid flow on the accuracy of reproduction by facilities of gas-liquid mixture discharge at high pressure is analyzed. Algorithm of air and Exxol phase equilibrium calculations is developed for mixtures of different concentrations, using equations of states and fundamental statements of thermodynamics. The values of binary interaction coefficients of oil substitute Exxol and main air components ( nitrogen, carbon dioxide, oxygen and argon) were obtained. Experimental and calculated saturation pressure data is obtained for Exxol-air mixtures of different concentrations. It’s shown, that disregarding phase transitions leads to significant distortion of information on parameters of reproduced by facilities multiphase flow</p></trans-abstract><kwd-group xml:lang="ru"><kwd>фазовый переход</kwd><kwd>фазовое равновесие</kwd><kwd>воспроизведение расхода газожидкостной смеси</kwd><kwd>уравнения состояния</kwd><kwd>давление насыщения</kwd><kwd>phase transition</kwd><kwd>phase equilibrium</kwd><kwd>reproduction of gas-liquid mixture discharge</kwd><kwd>equation of state</kwd><kwd>saturation pressure</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">ГОСТ 8.637-2013. ГСИ. Государственная поверочная схема для средств измерений многофазных потоков.</mixed-citation><mixed-citation xml:lang="en">ГОСТ 8.637-2013. ГСИ. 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