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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">10.30724/1998-9903-2018-20-11-12-93-98</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-808</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>ПРОЦЕСС ПЕРЕНОСА ТЕПЛА В ДВУХСЛОЙНОМ ЦИЛИНДРИЧЕСКОМ ТЕЛЕ</article-title><trans-title-group xml:lang="en"><trans-title>THE PROCESS OF HEAT TRANSFER IN TWO-LAYERED CYLINDRICAL BODY</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>Видин</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vidin</surname><given-names>U. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">zlobinsfu@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>Казаков</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kazakov</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">roman.kazakov@list.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Злобин</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zlobin</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">zlobinsfu@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский федеральный университет, г. Красноярск</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Polytechnic Institute of the Siberian Federal University, Krasnoyarsk</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>МОД «Народный контроль в ЖКХ», г. Красноярск</institution><country>Россия</country></aff><aff xml:lang="en"><institution>People's control in housing and communal services, Krasnoyarsk</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>02</month><year>2019</year></pub-date><volume>20</volume><issue>11-12</issue><fpage>93</fpage><lpage>98</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Видин Ю.В., Казаков Р.В., Злобин В.С., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Видин Ю.В., Казаков Р.В., Злобин В.С.</copyright-holder><copyright-holder xml:lang="en">Vidin U.V., Kazakov R.V., Zlobin V.S.</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/808">https://www.energyret.ru/jour/article/view/808</self-uri><abstract><p>Определение тепловых режимов составных цилиндрических тел аналитическими методами приводит к появлению сложных характеристических уравнений, решением которых является определение собственных чисел. В статье рассмотрен сравнительно простой приближенный аналитический метод определения собственных чисел характеристических уравнений для двухслойного цилиндрического тела при граничных условиях третьего рода. Данный метод также может быть легко использован в более сложных постановках задач теплопроводности.</p></abstract><trans-abstract xml:lang="en"><p>Determination of thermal regimes of composite cylindrical bodies by analytical methods leads to the appearance of complex characteristic equations, the solution of which is the determination of eigenvalues. The article considers a relatively simple approximate analytical method for determining the eigenvalues of characteristic equations for a two-layer cylindrical body under boundary conditions of the third kind. This method can also be easily used in more complex formulations of heat conduction problems.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>характеристическое уравнение</kwd><kwd>собственные числа</kwd><kwd>нестационарное температурное поле</kwd><kwd>неоднородное цилиндрическое тело.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>characteristic equation</kwd><kwd>eigenvalues</kwd><kwd>non-stationary temperature field</kwd><kwd>non-uniform cylindrical body</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">Лыков А.В. Теория теплопроводности. М.: Высшая школа, 1967. 600 с.</mixed-citation><mixed-citation xml:lang="en">Lykov, A.V. the Theory of thermal conductivity. M.: Higher school, 1967. 600 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Карслоу Г., Егер Д. 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