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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">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">18626</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2018-19-1-7-21</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Aviation and rocket and space technology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Авиационная и ракетно-космическая техника</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">Numerical modeling of a wing leading-edge thermal regimes for a reusable space vehicle</article-title><trans-title-group xml:lang="ru"><trans-title>Численное моделирование тепловых режимов передней кромки крыла возвращаемого космического аппарата</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bodnya</surname><given-names>Ivan S</given-names></name><name xml:lang="ru"><surname>Бодня</surname><given-names>Иван Сергеевич</given-names></name></name-alternatives><bio xml:lang="en"><p>master student at Bauman Moscow State Technical University in the Mechanical engineering department SM-13 “Space-Rocket Composite Designs”. Research interests: heat transfer, thermal regimes of space vehicles</p></bio><bio xml:lang="ru"><p>магистрант кафедры СМ-13 «Ракетно-космические композитные конструкции» Московского государственного технического университета им. Н.Э. Баумана (национальный исследовательский университет). Область научных интересов: теплообмен, тепловые режимы космических аппаратов</p></bio><email>ivanbodnya@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Timoshenko</surname><given-names>Valery P</given-names></name><name xml:lang="ru"><surname>Тимошенко</surname><given-names>Валерий Павлович</given-names></name></name-alternatives><bio xml:lang="en"><p>professor at Bauman Moscow State Technical University in the Mechanical engineering department SM-13 “Space-Rocket Composite Designs”. Research interests: heat transfer, thermal protection of space vehicles, space vehicles tests.</p></bio><bio xml:lang="ru"><p>профессор кафедры СМ-13 «Ракетно-космические композитные конструкции» Московского государственного технического университета им. Н.Э. Баумана (национальный исследовательский университет). Область научных интересов: теплообмен, тепловая защита космических аппаратов, испытания космических аппаратов</p></bio><email>moltim@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Bauman Moscow State Technical University (National research university of technology)</institution></aff><aff><institution xml:lang="ru">Московский государственный технический университет им. Н.Э. Баумана (национальный исследовательский университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2018</year></pub-date><volume>19</volume><issue>1</issue><issue-title xml:lang="en">VOL 19, NO1 (2018)</issue-title><issue-title xml:lang="ru">ТОМ 19, №1 (2018)</issue-title><fpage>7</fpage><lpage>21</lpage><history><date date-type="received" iso-8601-date="2018-06-03"><day>03</day><month>06</month><year>2018</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Bodnya I.S., Timoshenko V.P.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Бодня И.С., Тимошенко В.П.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Bodnya I.S., Timoshenko V.P.</copyright-holder><copyright-holder xml:lang="ru">Бодня И.С., Тимошенко В.П.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/18626">https://journals.rudn.ru/engineering-researches/article/view/18626</self-uri><abstract xml:lang="en"><p>Throughout the history of human exploration of outer space, work is underway to reduce the cost of bringing cargo into space. One of the technically feasible solutions to achieve this is the use of smallsized reusable aerospace vehicles. As the new thermal protection materials are developed, they are employed for the construction of the reusable aerospace vehicles (RSV). In this paper, the assessment is given of the possibility of making RSV wing leading edge from an Al2O3 fiber based heat-resistant porous ceramic. The main advantages of using such material are its relatively low values of thermal conductivity and density, which makes it possible to improve weight characteristics of the RSV. The material of the support structure is heat-resistant carbon fiber reinforced polymer (CFRP). Due to the porous nature of such thermal protection system (TPS), it is necessary to consider the effect of air pressure on the thermal conductivity of the material. Therefore, a computational mathematical model is proposed that allows one to take into account this dependence of thermal conductivity on temperature and pressure for the wing edge porous TPS of an aerospace vehicle, during its re-entry in the atmosphere. Based on the temperature field inside the leading edge, the minimum thickness of the thermal protection coating was determined so that the support structure temperature stays within its maximum permissible operating range. It is shown that the Al2O3 heat-resistant porous ceramic can provide the required thermal protection, so that the maximum temperature of the composite support structure does not exceed 250 °C on the entire re-entry flight path.</p></abstract><trans-abstract xml:lang="ru"><p>На протяжении всей истории освоения людьми космического пространства, ведутся работы по снижению стоимости вывода грузов в космос. Одним из технически реализуемых решений для достижения этой цели является использование малоразмерных многоразовых аэрокосмических аппаратов. Для обеспечения тепловой защиты конструкции многоразовых аэрокосмических аппаратов применяются современные термостойкие композитные покрытия. В данной работе представлена оценка возможности выполнения кромки крыла из термостойкой пористой керамики на основе волокон Al2O3. В связи с пористой структурой подобной теплозащиты, показана необходимость принимать во внимание влияние внешнего давления воздуха на теплопроводность материала. Предложена расчетная математическая модель, позволяющая учитывать зависимость теплопроводности пористого теплозащитного материала передней кромки крыла аэрокосмического аппарата от температуры и давления, при его спуске в атмосфере. На основе анализа поля температур внутри кромки крыла определена минимальная толщина теплозащитного покрытия исходя из максимально допустимой рабочей температуры силовой конструкции. Показано, что термостойкая пористая керамика на основе волокон Al2O3 способна обеспечить необходимую тепловую защиту силовой конструкции, температура которой не превышала 250 °С на всей траектории полета.</p></trans-abstract><kwd-group xml:lang="en"><kwd>mathematical modeling</kwd><kwd>wing leading edge</kwd><kwd>composite material</kwd><kwd>porous ceramics</kwd><kwd>Al2O3 fibers</kwd><kwd>thermal protection</kwd><kwd>small-size aerospace vehicle</kwd><kwd>heat flow</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>математическое моделирование</kwd><kwd>передняя кромка крыла</kwd><kwd>композитный материал</kwd><kwd>пористая керамика</kwd><kwd>волокна Al2O3</kwd><kwd>тепловая защита</kwd><kwd>малоразмерный аэрокосмический аппарат</kwd><kwd>тепловой поток</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Dumbacher D. 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