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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">10.21822/2073-6185-2018-45-4-133-141</article-id><article-id custom-type="elpub" pub-id-type="custom">vdgtu-629</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>СТРОИТЕЛЬСТВО И АРХИТЕКТУРА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BUILDING AND ARCHITECTURE</subject></subj-group></article-categories><title-group><article-title>ЭКСПЕРИМЕНТАЛЬНОЕ ОПРЕДЕЛЕНИЕ КОЭФФИЦИЕНТОВ КОНВЕКТИВНОЙ ТЕПЛООТДАЧИ В СИСТЕМЕ ВЕНТИЛЯЦИИ С ТЕПЛОВЫМ ПОБУЖДЕНИЕМ</article-title><trans-title-group xml:lang="en"><trans-title>EXPERIMENTAL DETERMINATION OF CONVECTIVE HEAT TRANSFER COEFFICIENTS IN THERMAL BUOYACY VENTILATION SYSTEM</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>Абрамкина</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Abramkina</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>преподаватель, кафедра «Теплогазоснабжение и вентиляция»</p><p>129337, г. Москва, Ярославское шоссе, д.26, Россия</p></bio><bio xml:lang="en"><p>Teacher, Department "Heat and gas supply and ventilation"</p><p>26 Yaroslavskoye Shosse, Moscow 129337, Russia</p></bio><email xlink:type="simple">dabramkina@ya.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>Абрамян</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Abramyan</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>бакалавр, кафедра «Теплогазоснабжение и вентиляция»</p><p>129337, г. Москва, Ярославское шоссе, д.26, Россия</p></bio><bio xml:lang="en"><p>Bachelor, Department "Heat and gas supply and ventilation"</p><p>26 Yaroslavskoye Shosse, Moscow 129337, Russia</p></bio><email xlink:type="simple">alexeyabramyan@icloud.com</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>Шевченко-Эннс</surname><given-names>Э. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Shevchenko-Enns</surname><given-names>E. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>бакалавр, кафедра «Теплогазоснабжение и вентиляция»</p><p>129337, г. Москва, Ярославское шоссе, д.26, Россия</p></bio><bio xml:lang="en"><p>Bachelor, Department "Heat and gas supply and ventilation"</p><p>26 Yaroslavskoye Shosse, Moscow 129337, Russia</p></bio><email xlink:type="simple">eleonora_shevchenkoenns@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (National Research University)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>27</day><month>06</month><year>2019</year></pub-date><volume>45</volume><issue>4</issue><fpage>133</fpage><lpage>141</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Абрамкина Д.В., Абрамян А.А., Шевченко-Эннс Э.Р., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Абрамкина Д.В., Абрамян А.А., Шевченко-Эннс Э.Р.</copyright-holder><copyright-holder xml:lang="en">Abramkina D.V., Abramyan A.A., Shevchenko-Enns E.R.</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/629">https://vestnik.dgtu.ru/jour/article/view/629</self-uri><abstract><p>Цель. Главной целью статьи является представление разработанного метода экспериментального определения коэффициентов конвективной теплоотдачи, подходящего при исследовании внутренней конвекции моделей сложной конфигурации. Метод. Исследование свободной конвекции в условиях внутренней задачи проводилось с помощью определения условной толщины пограничного слоя графическим методом. В первую очередь производился подбор расчетных сечений и плоскостей для экспериментальной установки. Выбор осуществляется таким образом, чтобы расчетные плоскости были перпендикулярны нагреваемым стенкам рассматриваемого канала. Установка экспериментальной модели возможна только в помещении с низкой подвижностью внутреннего воздуха, а также устойчивой температурой. В данном помещении не должно быть отопительных и нагревательных приборов, которые могут создавать сильные конвективные потоки около канала экспериментальной установки. Результат. В статье представлены результаты экспериментального исследования по определению распределения температуры воздушного потока и средних коэффициентов конвективной теплоотдачи по высоте вентиляционного канала. Снижение коэффициентов конвективной теплоотдачи на высоте от 0,5 до 1 метра происходит менее заметно, чем на высоте от 1 до 2 метров, что связано с восстановлением течения после вентиляционного отвода. На участке стабилизации происходит сначала постепенное снижение, а потом увеличение осевой скорости, которое обусловлено слиянием разнонаправленных потоков воздуха в этой области. Вывод. Выявлено, что в случае моделирования свободной конвекции в условиях внутренней задачи при наличии теплоотводящих границ в пределах расчетной разности температур, учет турбулизации течения практически не оказывает влияние на конечные результаты. </p></abstract><trans-abstract xml:lang="en"><p>Objectives. The main goal of the article is to present the developed method for the experimental determination of convective heat transfer coefficients, suitable for studying the internal convection of models of complex configuration. Method. The study of free convection under the conditions of an internal problem was carried out by determining the conditional thickness of the boundary layer by a graphic method. The first was the selection of the calculated sections and planes for the experimental installation. The selection is carried out in such a way that the calculated planes are perpendicular to the heated walls of the channel in question. Installation of an experimental model is possible only in a room with low internal air mobility, as well as a stable temperature. In this room there should not be heating and heating devices that can create strong convective currents near the channel of the experimental installation. Result. The article presents the results of an experimental study to determine the temperature distribution of the air flow and average convective heat transfer coefficients over the height of the ventilation channel. A decrease in convective heat transfer coefficients at an altitude of 0.5 to 1 meter occurs less noticeably than at an altitude of 1 to 2 meters, which is associated with the restoration of flow after a vent removal. At the stabilization section, there is first a gradual decrease, and then an increase in axial velocity, which is caused by the merging of multidirectional air flows in this area. Conclusion. It was revealed that in the case of modeling free convection under the conditions of an internal problem in the presence of heat-removing boundaries  within the limits of the calculated temperature difference, taking into account the flow turbulization has practically no effect on the final results.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>свободная конвекция</kwd><kwd>коэффициент теплоотдачи</kwd><kwd>условная толщина пограничного слоя</kwd><kwd>тепловое побуждение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>free convection</kwd><kwd>heat transfer coefficient</kwd><kwd>conditional thickness of the boundary layer</kwd><kwd>thermal inducement</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">Корепанов Е.В. Свободная конвекция в окнах с двойным остеклением / Е.В. Корепанов // Известия высших учебных заведений. 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(In Russ.)]</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
