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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">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2023-25-2-176-186</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-2624</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>ТЕОРЕТИЧЕСКАЯ И ПРИКЛАДНАЯ ТЕПЛОТЕХНИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORETICAL AND APPLIED HEAT ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Оценка моделей турбулентности при внешнем обтекании нагреваемой трубы</article-title><trans-title-group xml:lang="en"><trans-title>Evaluation of turbulence models in the external flow around the heated pipe</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5910-5312</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бадретдинова</surname><given-names>Г. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Badretdinova</surname><given-names>G. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гузель Рамилевна Бадретдинова, ассистент</p><p>кафедра «Теоретические основы теплотехники»</p><p>Казань</p></bio><bio xml:lang="en"><p>Guzel R. Badretdinova</p><p>Kazan</p></bio><email xlink:type="simple">mce.badretdmova@mail.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>Калимуллин</surname><given-names>И. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalimullin</surname><given-names>I. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ильдар Рамилевич Калимуллин, к. т. н.,  доцент, заведующий кафедрой</p><p>кафедра «Энергобезопасность»</p><p>Казань</p></bio><bio xml:lang="en"><p>Ildar. R. Kalimullin</p><p>Kazan</p></bio><email xlink:type="simple">ildarkalimullin@mail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1380-4433</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зинуров</surname><given-names>В. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Zinurov</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вадим Эдуардович Зинуров, ассистент</p><p>кафедра «Теоретические основы теплотехники»</p><p>Казань</p></bio><bio xml:lang="en"><p>Vadim E. Zinurov</p><p>Kazan</p></bio><email xlink:type="simple">vadd_93@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8979-4457</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дмитриев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dmitriev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Владимирович Дмитриев, д-р. техн. наук, доцент, заведующий кафедрой</p><p>кафедра «Теоретические основы теплотехники»</p><p>Казань</p></bio><bio xml:lang="en"><p>Audrey V. Dmitriev</p><p>Kazan</p></bio><email xlink:type="simple">ieremiada@mail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный энергетический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Power Engineering University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Казанский (Приволжский) федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>09</day><month>06</month><year>2023</year></pub-date><volume>25</volume><issue>2</issue><fpage>176</fpage><lpage>186</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бадретдинова Г.Р., Калимуллин И.Р., Зинуров В.Э., Дмитриев А.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Бадретдинова Г.Р., Калимуллин И.Р., Зинуров В.Э., Дмитриев А.В.</copyright-holder><copyright-holder xml:lang="en">Badretdinova G.R., Kalimullin I.R., Zinurov V.E., Dmitriev A.V.</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://www.energyret.ru/jour/article/view/2624">https://www.energyret.ru/jour/article/view/2624</self-uri><abstract><p>   Исследование теплообменных процессов с помощью численного моделирования в программных комплексах представляет собой сложную операцию. В ходе проведения численных исследований по передаче тепла необходимо адекватно настроить решение задачи. Для этого подбираются наиболее подходящие модели турбулентности, создаются сеточные модели, задаются граничные условия. Получение достоверных результатов численного моделирования теплообменных процессов напрямую зависит от задания верных параметров, которые необходимо изначально проанализировать. По итогу работы над анализом необходимых параметров можно получить адекватное решение задачи.</p><sec><title>   ЦЕЛЬ</title><p>   ЦЕЛЬ. Оценить влияние моделей турбулентностей на процесс теплоотдачи и подобрать наиболее подходящую модель для проведения численного моделирования внешнего обтекания нагреваемой трубы. Изучить влияние количественных критериев сеточной модели на точность и сходимость решения численного расчета.</p></sec><sec><title>   МЕТОДЫ</title><p>   МЕТОДЫ.  При проведении численного моделирования был использован метод конечных элементов в программном комплексе ANSYS Fluent.</p></sec><sec><title>   РЕЗУЛЬТАТЫ</title><p>   РЕЗУЛЬТАТЫ. В ходе проведения исследования была подобрана наиболее подходящая модель турбулентности для решения задачи внешнего обтекания нагреваемой трубы. Построена сеточная модель с учетом особенностей рассматриваемой задачи. Определены погрешности в зависимости от количественных критериев сеточноймодели.</p></sec><sec><title>   ЗАКЛЮЧЕНИЕ</title><p>   ЗАКЛЮЧЕНИЕ.  Проведенные численные исследования позволили дать сравнительную оценку для труб с различным оребрением. Полученные результаты показали, что замена труб с прямым оребрением на спиральное позволяент увеличить интенсивность теплоотдачи до 40 %.</p></sec></abstract><trans-abstract xml:lang="en"><p>   The study of heat exchange processes using numerical modeling in software systems is a complex operation. In the course of conducting numerical studies on heat transfer, it is necessary to adequately adjust the solution of the problem. To do this, the most suitable turbulence models are selected, grid models are created, and boundary conditions are set. Obtaining reliable results of numerical simulation of heat exchange processes directly dependson setting the correct parameters that need to be analyzed initially, , 4 s  a result of the work on the analysis of the necessary parameters, an adequate solution to the problem can be obtained.</p><sec><title>   THE PURPOSE</title><p>   THE PURPOSE. To evaluate the influence of turbulence models on the heat transfer process and to select the most suitable model for numerical simulation of the external flow around the heated pipe. To study the influence of quantitative criteria of the grid model on the accuracy and convergence of the numerical calculation solution.</p></sec><sec><title>   METHODS</title><p>   METHODS. During the numerical simulation, the finite element method was used in the ANSYS Fluent software package.</p></sec><sec><title>   RESULTS</title><p>   RESULTS. In the course of the study, the most suitable turbulence model was selected to solve the problem of external flow around the heated pipe. A grid model is constructed taking into account the features of the problem under consideration. The errors are determined depending on the quantitative criteria of the grid model.</p></sec><sec><title>   CONCLUSION</title><p>   CONCLUSION. Numerical studies have made it possible to give a comparative assessment for pipes with different fins. The results obtained showed that replacing pipes with straight fins with spiral ones allows increasing the heat transfer intensity up to 40 %.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>модель турбулентности</kwd><kwd>внешнее обтекание</kwd><kwd>оребренная труба</kwd><kwd>ортогональность</kwd><kwd>асимметрия</kwd><kwd>теплоотдача</kwd></kwd-group><kwd-group xml:lang="en"><kwd>turbulence model</kwd><kwd>external flow</kwd><kwd>finned tube</kwd><kwd>orthogonality</kwd><kwd>skewness</kwd><kwd>heat transfer</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">Taler D. Determining velocity and friction factor for turbulent flow in smooth tubes // International Journal of Thermal Sciences. 2016. Vol. 105. pp. 109-122.</mixed-citation><mixed-citation xml:lang="en">Taler D. 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