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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">caht</journal-id><journal-title-group><journal-title xml:lang="ru">Научный вестник МГТУ ГА</journal-title><trans-title-group xml:lang="en"><trans-title>Civil Aviation High Technologies</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-0619</issn><issn pub-type="epub">2542-0119</issn><publisher><publisher-name>Moscow State Technical University of Civil Aviation (MSTU CA)</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">caht-841</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>Статьи</subject></subj-group></article-categories><title-group><article-title>ВЕРИФИКАЦИЯ ГИБРИДНОЙ ЧИСЛЕННОЙ СХЕМЫ ДЛЯ ЗАДАЧИ НАТЕКАНИЯ СЖИМАЕМОЙ СТРУИ НА ТВЕРДУЮ ПРЕГРАДУ</article-title><trans-title-group xml:lang="en"><trans-title>VERIFICATION OF HYBRID NUMERICAL SCHEME FOR THE CASE OF COMPRESSIBLE JET IMPINGIMENT ON FLAT PLATE</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>Крапошин</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kraposhin</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший научный сотрудник</p></bio><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>Стрижак</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Strijhak</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер</p></bio><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>ИСП РАН</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>28</day><month>11</month><year>2016</year></pub-date><volume>0</volume><issue>226</issue><fpage>183</fpage><lpage>190</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Крапошин М.В., Стрижак С.В., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Крапошин М.В., Стрижак С.В.</copyright-holder><copyright-holder xml:lang="en">Kraposhin M.V., Strijhak S.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://avia.mstuca.ru/jour/article/view/841">https://avia.mstuca.ru/jour/article/view/841</self-uri><abstract><p>В статье рассматриваются вопросы математического моделирования истечения свободной сжимаемой турбулентной струи из модельного сопла и натекания струи на твердую преграду при различных степенях нерасчетности. Для решения задачи используется разработанный авторами статьи решатель pisoCentralFoam на базе гибридной численной схемы Kurganov-Tadmor, алгоритма PISO и метода контрольного объема. Для расчета сжимаемой струи используется модель на базе нестационарных уравнений Рейнольдса и k-omega SST модели турбулентности с пристеночными функциями. Приведена постановка задачи для расчета натекания струи на преграду. Расчетная область представляла собой прямоугольник. Для упрощения постановки задачи рассматривалось только половина сопла. Для случая свободной струи на задания давления на выходе расчетной области использовалось смешанное граничное условие 3-го рода. На входе расчетной области задавалось специальное табличное условие для давления, которое позволяло постепенно поднимать абсолютное значений для давления. Значение степени нерасчетности струи выбиралось равным n = 2,5 и n = 5,0. Проведен анализ сеточной сходимости на сетках от 100 тысяч до 500 тысяч ячеек. Среднее значение величины y+ составило 270. Расчеты проводились для конечного времени Tend = 0,01 секунды. Получены результаты распределения поля модуля скорости, давления на оси симметрии. Проведено сравнение результатов расчета распределения давления по длине сопла на разных расчетных сетках с результатами эксперимента. Получено совпадение с результатами эксперимента с точностью в 5 %.</p></abstract><trans-abstract xml:lang="en"><p>The article deals with the questions of mathematical modeling of compressible jet outflow from model nozzle and jet impingiment on flat plate at various values of n. pisoCentralFoam solver which is based on the Kurganov-Tadmor hybrid numerical scheme, PISO algorithm and finite volume method, is used for the solution of this problem. The model, based on unsteady Reynolds equation and K-omega SST turbulence model with boundary functions is used for compressible jet calculation. The problem definition for calculation of jet impingiment on flat plate is given. The simulation domainwas selected as a rectangle. Only a half of the nozzle was considered for simplification. The mixed boundary condition for pressure setting in case of free jet was used on the outlet of simulation domain. The special condition for the pressure with table data, allowed to increase the value of pressure gradually, was used on the inlet of simulation domain. The value of the jet pressure degree was selected as n = 2.5 and n = 5.0. The results of distribution of the velocity magnitude, field pressure, upon symmetry axes were received. The simulations were done with grids 100 000-500 000 cells. The average value of y+ was equal to 270. The calculations were done for the end time Tend = 0.01 s. Comparison of the results of pressure distribution calculation based on nozzle length on different grids with the results of the experiment is carried out. The coincidence to engineering accuracy of 5 % is received.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Сжимаемая струя</kwd><kwd>твердая преграда</kwd><kwd>бочка Маха</kwd><kwd>устойчивость</kwd><kwd>сетка</kwd><kwd>численная схема</kwd><kwd>нестационарный расчет</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Compressible Jet</kwd><kwd>flat plate</kwd><kwd>Mach barrel</kwd><kwd>stability</kwd><kwd>grid</kwd><kwd>numerical scheme</kwd><kwd>unsteady simulation</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">Антонов А.Н., Купцов В.М., Комаров В.В. Пульсации давления при струйных и отрывных течениях. М.: Машиностроение, 1990. 272 с</mixed-citation><mixed-citation xml:lang="en">Antonov A.N. et al. Pulsatsii davleniya pri stryinykh i otryvnykh techeniyach. Moscow, Mashinostroenie, 1990. 272 p. 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