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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">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2021-23-4-84-95</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-1887</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</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Влияние закрутки лопаток последней ступени на эффективность блока «ступень-диффузор» стационарной ГТУ</article-title><trans-title-group xml:lang="en"><trans-title>The influence of the last stage blades swirl to the efficiency of «stage-diffuser» unit of stationary GTU</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2944-1822</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вокин</surname><given-names>Л. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Vokin</surname><given-names>L O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вокин Леонид Олегович – аспирант сектора Турбин ВШЭМ ИЭ </p><p>г. Санкт-Петербург</p><p> </p></bio><bio xml:lang="en"><p>Leonid O. Vokin – Higher School of Power Engineering, Institution of Energy</p><p>Saint-Petersburg</p></bio><email xlink:type="simple">leonidvokin@mail.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>Семакина</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Semakina</surname><given-names>E Yu</given-names></name></name-alternatives><bio xml:lang="ru"><p>Семакина Елена Юрьевна – кандидат технических наук, доцент сектора Турбин ВШЭМ ИЭ </p><p>г. Санкт-Петербург</p></bio><bio xml:lang="en"><p>Elena Yu. Semakina– Higher School of Power Engineering, Institution of Energy</p><p>Saint-Petersburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Черников</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Chernikov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Черников Виктор Александрович – доктор технических наук, профессор, доцент сектора Турбин ВШЭМ ИЭ</p><p>г. Санкт-Петербург</p></bio><bio xml:lang="en"><p>Victor A. Chernikov –Higher School of Power Engineering, Institution of Energy</p><p>Saint-Petersburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский политехнический университет Петра Великого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Peter the Great St. Petersburg Polytechnic University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>12</day><month>10</month><year>2021</year></pub-date><volume>23</volume><issue>4</issue><fpage>84</fpage><lpage>95</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Вокин Л.О., Семакина Е.Ю., Черников В.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Вокин Л.О., Семакина Е.Ю., Черников В.А.</copyright-holder><copyright-holder xml:lang="en">Vokin L.O., Semakina E.Y., Chernikov V.A.</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://www.energyret.ru/jour/article/view/1887">https://www.energyret.ru/jour/article/view/1887</self-uri><abstract><sec><title>ЦЕЛЬ</title><p>ЦЕЛЬ. Нахождение специального закона закрутки лопаток последней ступени стационарной ГТУ. В силу специфичности условий её работы – в системе с диффузором – традиционные законы закрутки приводят к неоптимальному течению в диффузоре и, как следствие, снижают эффективность всего блока и установки в целом. В работе предпринята попытка применения такой закрутки лопаточного аппарата, которая способствовала бы улучшению процесса восстановления давления в диффузоре. Исследовались две ступени с различными законами закрутки – с традиционным законом постоянства угла выхода потока из направляющего аппарата вдоль радиуса, и с «обратной закруткой» потока. Диффузор в обоих случаях использовался один и тот же.</p></sec><sec><title>МЕТОДЫ</title><p>МЕТОДЫ. В работе применялись численные и экспериментальные методы исследования трёхмерного потока. Экспериментальные исследования проводились с помощью пневмометрических пятиканальных зондов оригинальной конструкции на аэродинамическом стенде ЭТ-4 в лаборатории Турбостроения СПбПУ. Численные исследования выполнялись в пакете газодинамического расчёта CFX в качестве граничных условий использовались параметры в соответствующих сечениях, полученные во время физического эксперимента.</p></sec><sec><title>РЕЗУЛЬТАТЫ</title><p>РЕЗУЛЬТАТЫ. Были получены интегральные характеристики ступени, поля векторов скоростей потока в различных сечениях. Результаты эксперимента были сопоставлены с данными численных расчётов.</p></sec><sec><title>ЗАКЛЮЧЕНИЕ</title><p>ЗАКЛЮЧЕНИЕ. Оптимальным законом закрутки для последней ступени, работающей в блоке с диффузором, является специальный тип закрутки её лопаточного аппарата – «обратная закрутка».</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>THE PURPOSE</title><p>THE PURPOSE. Determination of the optimal law of swirling of the blades of the last stage of a stationary GTU. Due to the specificity of its operating conditions - in a system with a diffuser - the traditional laws of swirling lead to a non-optimal flow in the diffuser and, consequently, reduce the efficiency of the entire unit and the power plant as a whole. In this paper, we used numerical and experimental methods for studying a three-dimensional flow. Two stages with different laws of swirling were investigated - with the traditional law of constancy of the angle of flow out of the guide vanes along the radius, and with reverse swirling. The same diffuser was used in both cases. </p></sec><sec><title>METHODS</title><p>METHODS. Experimental studies were carried out using pneumometric five-channel probes of an original design on an ET-4 aerodynamic stand in the Turbomachinery laboratory of SPbPU. Numerical studies were carried out in the CFX gas dynamic calculation package; the parameters in the corresponding sections, obtained during the physical experiment, were used as boundary conditions.</p></sec><sec><title>RESULTS</title><p>RESULTS. Integral characteristics of the stage, the vector of flow velocities in various sections were obtained. The experiment was compared with the numerical calculation and showed satisfactory convergence of the results. </p></sec><sec><title>CONCLUSION</title><p>CONCLUSION. The optimal swirling law for the last stage operating in a system with a diffuser is forced vortex flow.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>закон закрутки</kwd><kwd>численное моделирование</kwd><kwd>физический эксперимент</kwd><kwd>аэродинамический зонд</kwd><kwd>турбина</kwd><kwd>диффузор</kwd><kwd>эффективность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>swirl law</kwd><kwd>numerical modeling</kwd><kwd>physical experiment</kwd><kwd>aerodynamic probe</kwd><kwd>turbine</kwd><kwd>diffuser</kwd><kwd>efficiency</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">Гафуров А.М., Осипов Б.М., Гафуров Н.М., и др. Способ утилизации тепловых вторичных энергоресурсов промышленных предприятий для выработки электроэнергии. Известия высших учебных заведений. Проблемы энергетики.2016. №11-12. 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