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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">vestift</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-технических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physical-technical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8358</issn><issn pub-type="epub">2524-244X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8358-2023-68-4-331-343</article-id><article-id custom-type="elpub" pub-id-type="custom">vestift-821</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>ЭНЕРГЕТИКА, ТЕПЛО- И МАССООБМЕН</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING, HEAT AND MASS TRANSFER</subject></subj-group></article-categories><title-group><article-title>Оценка эффективности механизмов гетерогенного и гомогенного ингибирования частицами огнетушащего порошка активных частиц пламени с учетом скорости их образования</article-title><trans-title-group xml:lang="en"><trans-title>The effectiveness of mechanisms of heterogeneous and homogeneous inhibition of flame particles taking by extinguishing powder particles, into account the rate of their formation</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>Кицак</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kitsak</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кицак Анатолий Ильич – кандидат физико-математических наук, ведущий научный сотрудник отдела исследований автоматических средств обнаружения и ликвидации чрезвычайных ситуаций НИИ пожарной безопасности и проблем чрезвычайных ситуаций Министерства по чрезвычайным ситуациям Республики Беларусь.</p><p>Ул. Солтыса, 183а, 220046, Минск</p></bio><bio xml:lang="en"><p>Аnatoli I. Kitsak – Cand. Sci. (Physics and Mathematics), Leading Researcher of the Research Department of Automatic Means of Detection and Elimination of Emergencies at Research Institute of Fire Safety and Emergency Situations of the Ministry of Emergency Situations of the Republic of Belarus.</p><p>183а, Soltys Str., 220046, Minsk</p></bio><email xlink:type="simple">kitsak48@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>НИИ пожарной безопасности и проблем чрезвычайных ситуаций  Министерства по чрезвычайным ситуациям Республики Беларусь</institution></aff><aff xml:lang="en"><institution>Research Institute of Fire Safety and Emergencies of the Ministry for Emergency Situations of the Republic of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>08</day><month>01</month><year>2024</year></pub-date><volume>68</volume><issue>4</issue><fpage>331</fpage><lpage>343</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кицак А.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Кицак А.И.</copyright-holder><copyright-holder xml:lang="en">Kitsak A.I.</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://vestift.belnauka.by/jour/article/view/821">https://vestift.belnauka.by/jour/article/view/821</self-uri><abstract><p>Для совершенствования технологии тушения пожара огнетушащим порошком проведен анализ механизмов тушения пожара данным веществом, основанных на физико-химических процессах прерывания цепных реакций горения. Выполнена оценка эффективности механизмов гетерогенного и гомогенного ингибирования частицами порошка активных частиц пламени с учетом скорости их образования, а также сопоставление их вкладов в результат тушения пожара. Проведено математическое моделирование механизмов гетерогенного и гомогенного ингибирования частицами огнетушащего порошка активных частиц пламени с учетом скорости их образования. Получены теоретические зависимости скоростей реакций гетерогенного и гомогенного ингибирования активных частиц пламени от дисперсных характеристик частиц порошка, времени пребывания их в зоне горения и характерных длительностей реакций. Установлено, что условием эффективного восстановления активных частиц пламени рассматриваемыми механизмами является превышение времени взаимодействия частиц порошка с активными частицами пламени над длительностями реакций ингибирования, а также превышение скоростей данных реакций скорости их образования. Скорость восстановления активных частиц пламени зависит от размеров частиц огнетушащего порошка: чем меньше размер частиц порошка, тем больше скорость восстановления. Такая зависимость наблюдается в явном виде для механизма гетерогенного ингибирования активных частиц пламени и в неявном виде для механизма гомогенного ингибирования через зависимость скорости термообразования радикалов оксидов металлов огнетушащего порошка, участвующих в данном процессе, от размеров частиц порошка. Наличие двух стадий в реализации механизма гомогенного ингибирования активных частиц пламени (термообразования радикалов оксидов металлов применяемых порошковых веществ и собственно самого процесса ингибирования) позволяет считать данный механизм восстановления активных частиц более длительным, чем механизм гетерогенного ингибирования, а следовательно, не вносящим существенного вклада в химический процесс тушения пожара. Результаты работы могут быть применены при разработке составов огнетушащих порошков, а также в пожаротушении для выбора оптимальной скорости подачи огнетушащего порошка в очаг пожара.</p></abstract><trans-abstract xml:lang="en"><p>The relevance of the work is due to the need to improve the technology of extinguishing fire with extinguishing powders based on the study of the laws of the physicochemical processes of interrupting chain combustion reactions, in particular, heterogeneous and homogeneous mechanisms of inhibition of active flame centers by powder particles. The aim of the work is to evaluate the effectiveness of non-stationary mechanisms of heterogeneous and homogeneous inhibition of active flame particles by fire extinguishing powder particles taking into account the rate of their birth, as well as to compare the contributions of each of the mechanisms to the result of fire extinguishing. Mathematical modeling of the mechanisms of heterogeneous and homogeneous inhibition of active flame particles by fire extinguishing powder particles is carried out, taking into account the rate of birth of active particles of in flame. The theoretical dependences of the rates of reactions of heterogeneous and homogeneous inhibition of active flame particles on the dispersed characteristics of powder particles, their residence time in the zone of flame and the characteristic durations of inhibition reactions are obtained. It is established that the condition for the effective recovery inhibition of active particles of flame by the mechanisms under consideration is exceeding the time of interaction of powder particles with active flame particles over the duration of inhibition processes, as well as an excess of the rate of inhibition of active flame particles over the rate of their birth. The rate of inhibition of active particles of flame depends on the particle size of the extinguishing powder, namely, the smaller the particle size of the powder, the greater the rate of inhibition. This dependence is observed explicitly for the mechanism of heterogeneous inhibition of active particles of flame and implicitly for the mechanism of homogeneous inhibition through the dependence of the rate of thermal production of metal oxide radicals of the extinguishing powder involved in this process on the size of the powder particles. The presence of two stages in the implementation of the mechanism of homogeneous inhibition of active flame particles (thermal production of metal oxide radicals of the powder substances used and the inhibition process itself) allows us to consider this mechanism of extraction of active particles longer than the mechanism of heterogeneous reduction, and, therefore, it does not significantly contribute to the chemical process of extinguishing a fire.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>огнетушащий порошок</kwd><kwd>активные центры пламени</kwd><kwd>гетерогенное ингибирование пламени</kwd><kwd>гомогенное ингибирование</kwd><kwd>скорость генерации активных частиц пламени</kwd></kwd-group><kwd-group xml:lang="en"><kwd>extinguishing powder</kwd><kwd>active particles of flame</kwd><kwd>heterogeneous inhibition</kwd><kwd>homogeneous inhibition</kwd><kwd>inhibition time</kwd><kwd>the speed of birth active particles of flame</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">Краснянский, М. 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