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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Fluid Dynamics</journal-id><journal-title-group><journal-title xml:lang="en">Fluid Dynamics</journal-title><trans-title-group xml:lang="ru"><trans-title>Известия Российской академии наук. Механика жидкости и газа</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1024-7084</issn><issn publication-format="electronic">3034-5340</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">672140</article-id><article-id pub-id-type="doi">10.31857/S1024708424010106</article-id><article-id pub-id-type="edn">sddsot</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Modeling of the unsteady aerodynamic characteristics of the NACA 0015 airfoil from the data of numerical calculations of the flow</article-title><trans-title-group xml:lang="ru"><trans-title>Моделирование нестационарных аэродинамических характеристик профиля NACA 0015 по данным численного расчета обтекания</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Abramova</surname><given-names>К. А.</given-names></name><name xml:lang="ru"><surname>Абрамова</surname><given-names>К. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kseniya.abramova@tsagi.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Alieva</surname><given-names>D. А.</given-names></name><name xml:lang="ru"><surname>Алиева</surname><given-names>Д. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>diana.alieva@tsagi.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sudakov</surname><given-names>V. G.</given-names></name><name xml:lang="ru"><surname>Судаков</surname><given-names>В. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vit_soudakov@tsagi.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khrabrov</surname><given-names>А. N.</given-names></name><name xml:lang="ru"><surname>Храбров</surname><given-names>А. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>khrabrov@tsagi.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Zhukovski Central Aerohydrodynamic Institute (TsAGI)</institution></aff><aff><institution xml:lang="ru">Центральный аэрогидродинамический институт им. проф. Н. Е. Жуковского</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-08-27" publication-format="electronic"><day>27</day><month>08</month><year>2024</year></pub-date><issue>1</issue><fpage>131</fpage><lpage>144</lpage><history><date date-type="received" iso-8601-date="2025-02-27"><day>27</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/1024-7084/article/view/672140">https://transsyst.ru/1024-7084/article/view/672140</self-uri><abstract xml:lang="en"><p>The possible application of the results of numerical modeling in developing an approximate phenomenological mathematical aerodynamic model applicable in solving the problems of dynamics is studied with reference to the example of the unsteady flow past the NACA 0015 airfoil oscillating in the angle of attac<italic>k</italic> at different frequencies, amplitudes, and mean angles of attac<italic>k</italic>. For this purpose, the Reynolds equations are solved in both steady and unsteady formulations, together with the <italic>k</italic>–ω-SST turbulence model. The results of the calculations are validated by means of comparing them with the experimental data. The model of the normal force and the longitudinal moment formulated within the framewor<italic>k</italic> of an approach introducing an internal dynamic variable is identified according to the data of calculations. The results of the modeling are compared with the numerical and experimental data. The comparison with the conventional approach to the modeling based on the linear unsteady model with the use of dynamic derivatives is also carried out.</p></abstract><trans-abstract xml:lang="ru"><p>Исследуется возможность применения результатов численного моделирования для разработки приближенной феноменологической математической модели аэродинамики, пригодной для использования в задачах динамики, на примере нестационарного обтекания профиля NACA 0015 при колебаниях по углу атаки с различными частотами, амплитудами и средними углами атаки. Для этого решаются уравнения Рейнольдса в стационарной и нестационарной постановках с моделью турбулентности <italic>k</italic>–ω-SST. Проводится валидация результатов расчета путем сравнения с данными эксперимента. По данным расчета идентифицируется модель нормальной силы и продольного момента, сформулированная в рамках подхода с введением внутренней динамической переменной. Результаты моделирования сравниваются с расчетными и экспериментальными данными. Приводится сопоставление с традиционным подходом моделирования с помощью линейной нестационарной модели, использующей динамические производные.</p></trans-abstract><kwd-group xml:lang="en"><kwd>unsteady flow</kwd><kwd>hysteresis</kwd><kwd>aerodynamic characteristic</kwd><kwd>wing airfoil</kwd><kwd>numerical modeling</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нестационарное обтекание</kwd><kwd>гистерезис аэродинамических характеристик</kwd><kwd>профиль крыла</kwd><kwd>численное моделирование</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>проект № 21-19-00659</award-id></award-group><funding-statement xml:lang="en">The work was carried out with financial support from the Russian Science Foundation (project No. 21-19-00659).</funding-statement><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского научного фонда (проект № 21-19-00659).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Аэродинамика, устойчивость и управляемость сверхзвуковых самолетов / Под ред. 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