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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">kaz29</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Казахстанско-Британского технического университета</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of the Kazakh-British Technical University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-6688</issn><issn pub-type="epub">2959-8109</issn><publisher><publisher-name>Казахстанско-Британский Технический Университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55452/1998-6688-2021-18-2-45-52</article-id><article-id custom-type="elpub" pub-id-type="custom">kaz29-83</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>ФИЗИКО-МАТЕМАТИЧЕСКИЕ И ТЕХНИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICAL, MATHEMATICAL AND TECHNICAL SCIENCES</subject></subj-group></article-categories><title-group><article-title>ЧИСЛЕННОЕ ИССЛЕДОВАНИЕ РАССЕИВАНИЯ ЗАГРЯЗНИТЕЛЕЙ ВОЗДУХА В РЕЗУЛЬТАТЕ ХИМИЧЕСКИХ РЕАКЦИЙ ОТ ТЕПЛОВОЙ ЭЛЕКТРОСТАНЦИИ</article-title><trans-title-group xml:lang="en"><trans-title>NUMERICAL STUDY OF THE DISPERSION OF AIR POLLUTANTS AS A RESULT OF CHEMICAL REACTIONS IN A THERMAL POWER PLANT</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1937-8615</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Исахов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Issakhov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>050000, Алматы</p></bio><bio xml:lang="en"><p>Alibek Issakhov - PhD, Head of the Department of Mathematical and Computer Modeling</p><p>050000, Almaty</p></bio><email xlink:type="simple">Alibek.issakhov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1048-784X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алимбек</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Alimbek</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>050000, Алматы</p></bio><bio xml:lang="en"><p>Aidana Alimbek - Master of technical sciences, tutor of the Scientific and Educational Center of Mathematics and Cybernetics</p><p>050000, Almaty</p></bio><email xlink:type="simple">a.alimbek@kbtu.kz</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Казахский Национальный университет им. аль-Фараби; Казахстанско-Британский технический университет<country>Казахстан</country></aff><aff xml:lang="en">Al-Farabi Kazakh National university; Kazakh-British technical university<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Казахстанско-Британский технический университет<country>Казахстан</country></aff><aff xml:lang="en">Kazakh-British technical university<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>04</day><month>11</month><year>2021</year></pub-date><volume>18</volume><issue>2</issue><fpage>45</fpage><lpage>52</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Исахов А.А., Алимбек А.К., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Исахов А.А., Алимбек А.К.</copyright-holder><copyright-holder xml:lang="en">Issakhov A.A., Alimbek A.K.</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.kbtu.edu.kz/jour/article/view/83">https://vestnik.kbtu.edu.kz/jour/article/view/83</self-uri><abstract><p>В данной статье представлены результаты, полученные путем численного моделирования распространения загрязняющих веществ, образующихся при сжигании топлива на электрической теплоэлектростанции, и их химическая реакция в атмосфере. На примере реальной теплоэлектростанции (Экибастузская ГРЭС-1), была смоделирована дисперсия NO и продукт NO2 при химической реакции с кислородом. Примечательной особенностью данной теплоэлектростанции является то, что разница между дымоходами позволяет изучить влияние высоты источника на дисперсию загрязнения. Для описания этого процесса использовались уравнения Навье – Стокса, состоящие из уравнения неразрывности и движения. Для проверки математической модели и численного алгоритма численно решались тестовые задачи. Целью данной работы было изучение уровня концентрации загрязнения на разных расстояниях от источника. В результате были определены массовые доли концентрации и продукта. Согласно полученным данным, с увеличением расстояния от источника концентрация загрязнения распространяется более широко под влиянием диффузии. Чем дальше расстояние от трубы, тем ниже концентрация вещества. В результате численного исследования полученные данные могут быть использованы для дальнейших исследований проблем, связанных с распространением загрязняющих веществ в атмосферу для реальных атмосферных условий, также могут позволить в будущем спрогнозировать оптимальное расстояние от жилых районов для строительства ТЭС, при котором концентрация выбросов будет оставаться на безопасном уровне.</p></abstract><trans-abstract xml:lang="en"><p>This article presents the results obtained by numerical modeling of the spread of pollutants formed during the combustion of fuel at an electric thermal power plant and their chemical reaction in the atmosphere. On the example of a real thermal power plant (Ekibastuz SDPP-1), the dispersion of NO and the product of NO2 was modeled during a chemical reaction with oxygen. A notable feature of this thermal power plant is that the difference between the chimneys makes it possible to study the influence of the height of the source on the dispersion of pollution. To describe this process, the Navier - Stokes equations were used, consisting of the equation of continuity and motion. To check the mathematical model and the numerical algorithm, test problems were solved numerically. The aim of this work was to study the level of pollution concentration at different distances from the source. As a result, the mass fractions of concentration and product were determined. According to the data obtained, with increasing distance from the source, the concentration of pollution spreads more widely under the influence of diffusion. The further the distance from the pipe, the lower the concentration of the substance. As a result of a numerical study, the data obtained can be used for further studies of the problems associated with the spread of pollutants into the atmosphere for real atmospheric conditions, and can also allow in the future to predict the optimal distance from residential areas for the construction of thermal power plants, at which the concentration of emissions will remain at a safe level.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>химическая реакция</kwd><kwd>рассеивание загрязнителей воздуха</kwd><kwd>тепловая электростанция</kwd><kwd>струя в поперечном потоке</kwd><kwd>осреднение Навье-Стокса по Рейнольдсу (RANS)</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Chemical reaction</kwd><kwd>air pollutant dispersion</kwd><kwd>thermal power plant</kwd><kwd>jet in crossflow</kwd><kwd>Reynolds averaged Navier-Stokes (RANS)</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">H. 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