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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">vdgtu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Дагестанского государственного технического университета. Технические науки</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of Dagestan State Technical University. Technical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6185</issn><issn pub-type="epub">2542-095X</issn><publisher><publisher-name>Daghestan State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21822/2073-6185-2021-48-1-65-75</article-id><article-id custom-type="elpub" pub-id-type="custom">vdgtu-912</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>ЭНЕРГЕТИЧЕСКОЕ, МЕТАЛЛУРГИЧЕСКОЕ И ХИМИЧЕСКОЕ МАШИНОСТРОЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER, METALLURGICAL AND CHEMICAL MECHANICAL ENGINEERING</subject></subj-group></article-categories><title-group><article-title>ИНТЕГРАЦИЯ МОДУЛЯ ЧИСЛЕННОГО РЕШЕНИЯ КИНЕТИЧЕСКОГО УРАВНЕНИЯ В CFD-ПАКЕТ ДЛЯ ЗАДАЧИ ОБЪЕМНОЙ КОНДЕНСАЦИИ ПРИ ИСТЕЧЕНИИ ПАРОГАЗОВОЙ СМЕСИ ЧЕРЕЗ СОПЛО</article-title><trans-title-group xml:lang="en"><trans-title>INTEGRATION OF THE NUMERICAL SOLUTION MODULE OF THE KINETIC EQUATION INTO THE CFD PACKAGE FOR THE VOLUME CONDENSATION PROBLEM OF THE VAPOR-GAS MIXTURE FLOW THROUGH A NOZZLE</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>Сидоров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sidorov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p><p>111250, Москва, Красноказарменная ул., 14, Россия </p></bio><bio xml:lang="en"><p>14 Krasnokazarmennaya St., Moscow 111250, Russia </p></bio><email xlink:type="simple">SidorovAAn@mpei.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>Ястребов</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Yastrebov</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры низких температур</p><p>111250, Москва, Красноказарменная ул., 14, Россия </p></bio><bio xml:lang="en"><p>14 Krasnokazarmennaya St., Moscow 111250, Russia </p></bio><email xlink:type="simple">YastrebovAK@mpei.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский университет «МЭИ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research University «MPEI»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>27</day><month>04</month><year>2021</year></pub-date><volume>48</volume><issue>1</issue><fpage>65</fpage><lpage>75</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сидоров А.А., Ястребов А.К., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Сидоров А.А., Ястребов А.К.</copyright-holder><copyright-holder xml:lang="en">Sidorov A.A., Yastrebov A.K.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnik.dgtu.ru/jour/article/view/912">https://vestnik.dgtu.ru/jour/article/view/912</self-uri><abstract><sec><title>Цель</title><p>Цель. Интеграция модуля численного решения кинетического уравнения для функции распределения капель по размерам в CFD-пакет. Применение модуля к задаче объемной  конденсации при сверхзвуковом истечении парогазовой смеси через сопло в двумерной  постановке, сравнение результатов с экспериментальными данными сторонних авторов. </p></sec><sec><title>Метод</title><p>Метод. В настоящей работе задача об объемной конденсации при сверхзвуковом истечении парогазовой смеси через сопло решается методами конечных элементов в двумерной постановке с использованием пользовательских функций UDF.</p></sec><sec><title>Результат</title><p>Результат. Представлен модуль для численного решения кинетического уравнения для функции распределения капель по размерам, выполненный в виде пользовательской функции UDF, интегрированной в расчетный CFD-пакет.</p></sec><sec><title>Вывод</title><p>Вывод. Применение модуля к задаче об объемной конденсации при истечении парогазовой смеси через сопло дало качественное во всех областях и количественное согласование в области интенсивной конденсации с экспериментальными данными. Представлены распределения температур, давлений, степени пересыщения как вдоль центральной оси, так и на плоскости, ограниченной контуром расчетной области. Показано, что модуль не зависит от типа решателя (стационарный или нестационарный).</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objective</title><p>Objective. Integrating the numerical solution module of the kinetic equation for the droplet size distribution function in a CFD package. Application of the module to volumetric condensation at the supersonic flow of a vapor-gas  mixture through a nozzle in a two-dimensional formulation, comparison of  the results with experimental data of third-party authors.</p></sec><sec><title>Methods</title><p>Methods. In this  paper, the problem of volume condensation in the supersonic flow of a vapor-gas mixture through a nozzle is solved by finite element methods in a two-dimensional formulation using user-defined functions.</p></sec><sec><title>Results</title><p>Results. A module for the numerical solution of the kinetic equation for the droplet size distribution function is presented as a user-defined function integrated into the calculated CFD package.</p></sec><sec><title>Conclusion</title><p>Conclusion. The module application to volumetric condensation for a vapor-gas mixture flow through the nozzle gave a qualitative agreement in all areas and a quantitative agreement in the area of intense condensation with  measurement data. The distributions of temperatures, pressures, and  the degree of supersaturation are presented both along the central axis and  on the plane bounded by the contour of the computational domain. It is shown that the module does not depend on the solver type (stationary or non-stationary).</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>объемная конденсация</kwd><kwd>CFD</kwd><kwd>методы конечных элементов</kwd><kwd>прямое численное решение</kwd><kwd>кинетическое уравнение</kwd><kwd>сверхзвук</kwd><kwd>сопло</kwd></kwd-group><kwd-group xml:lang="en"><kwd>volume condensation</kwd><kwd>CFD</kwd><kwd>finite element methods</kwd><kwd>direct numerical solution</kwd><kwd>kinetic  equation</kwd><kwd>supersonic sound</kwd><kwd>nozzle</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 19-38-90247.</funding-statement><funding-statement xml:lang="en">The research was carried out with the financial support of the RFBR in the framework of the scientific project No. 19-38-90247.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Стернин Л.Е. 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