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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">pimi</journal-id><journal-title-group><journal-title xml:lang="ru">Приборы и методы измерений</journal-title><trans-title-group xml:lang="en"><trans-title>Devices and Methods of Measurements</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-9506</issn><issn pub-type="epub">2414-0473</issn><publisher><publisher-name>BNTU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2220-9506-2019-10-1-53-60</article-id><article-id custom-type="elpub" pub-id-type="custom">pimi-424</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>Методы измерений, контроля, диагностики</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Methods of measurements, monitoring, diagnostics</subject></subj-group></article-categories><title-group><article-title>Измерение температурного и напряженно-деформированного состояний трубного образца при воздействии локальных стохастических температурных пульсаций</article-title><trans-title-group xml:lang="en"><trans-title>Measuring the Temperature and Stress-Strain States of a Tube Sample under the Local Stochastic Temperature Pulsations</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>Дмитриев</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Dmitriev</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рязапов</surname><given-names>Р. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryazapov</surname><given-names>R. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адрес для переписки: Р.Р. Рязапов – Нижегородский государственный технический университет имени Р.Е. Алексеева, ул.Минина, 24, г. Нижний Новгород 603950, Россия.       e-mail: ryazapov.renat@gmail.com</p></bio><bio xml:lang="en"><p>Address for correspondence: R.R. Ryazapov – Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Minin str., 24, Nizhny Novgorod 603950, Russia.    e-mail: ryazapov.renat@gmail.com</p><p> </p></bio><email xlink:type="simple">ryazapov.renat@gmail.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>Мамаев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mamaev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соборнов</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Sobornov</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Котин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kotin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Легчанов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Legchanov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Львов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lvov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Нижегородский государственный технический университет имени Р.Е. Алексеева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>R.E. Alekseev Nizhny Novgorod State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Федеральный научно-производственный центр АО «Научно-производственное предприятие «Полет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research and Production center Joint Stock Company «Research and Production Company «Polyot»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>15</day><month>03</month><year>2019</year></pub-date><volume>10</volume><issue>1</issue><fpage>53</fpage><lpage>60</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дмитриев С.М., Рязапов Р.Р., Мамаев А.В., Соборнов А.Е., Котин А.В., Легчанов М.А., Львов А.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Дмитриев С.М., Рязапов Р.Р., Мамаев А.В., Соборнов А.Е., Котин А.В., Легчанов М.А., Львов А.В.</copyright-holder><copyright-holder xml:lang="en">Dmitriev S.M., Ryazapov R.R., Mamaev A.V., Sobornov A.E., Kotin A.V., Legchanov M.A., Lvov A.V.</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://pimi.bntu.by/jour/article/view/424">https://pimi.bntu.by/jour/article/view/424</self-uri><abstract><p>Обеспечение ресурса теплообменного оборудования водоохлаждаемых реакторных установок при случайных пульсациях температуры является важной научно-технической задачей атомной энергетики. Наиболее опасны термопульсации, вызываемые смешением потоков рабочих сред при высоких градиентах температуры. Целью работы являлось экспериментальное исследование температурного и напряженно-деформированного состояний трубного образца при воздействии локальных термопульсаций, обусловленных смешением потоков теплоносителя.</p><p>Для решения поставленных задач изготовлен тройниковый узел типа «встречный впрыск», включенный в состав теплофизического исследовательского стенда. Конструкция узла позволяет проводить исследования теплогидравлических и ресурсных характеристик трубных образцов 60 × 5 мм, изготовленных из сталей аустенитного класса. Разработаны средства измерения температурного, напряженно-деформированного состояний трубного образца и температурного поля потока теплоносителя в зоне смешения однофазных сред с различной температурой. Измерительные модели оснащены микротермопарами и тензорезисторами. В результате исследований получены массивы экспериментальных данных, содержащих реализации термопульсаций, осредненные во времени профили температуры потока и наружной поверхности трубного образца, статистические и спектрально-корреляционные характеристики термопульсаций. По результатам измерения относительных деформаций определены значения усталостных напряжений.</p><p>Разработаны устройства и методики исследования. Установлены комбинации режимных параметров, обеспечивающих термосиловое нагружение поверхности металла с наиболее высоким уровнем амплитуд переменных напряжений. Полученные данные используются для верифицирования метода оценки усталостной долговечности конструкционных материалов реакторных установок при случайных термопульсациях.</p></abstract><trans-abstract xml:lang="en"><p>Provding a high level of durability of heat exchange equipment of water-cooled reactors under local stochastic temperature pulsations is an important scientific and technical problem for the nuclear power industry. Temperature pulsations produced by mixing non-isothermal coolant flows with high temperature gradient are most dangerous. This work is an experimental study of temperature and stress-strain state of a tube sample under local stochastic temperature pulsations caused by mixing of coolant flows.</p><p>To solve the problems posed, a Y-junction with «counter injection» was built, which was included in the thermal-hydraulic research facility. The design of the Y-junction allows study of the thermal-hydraulic characteristics and durability of tube samples made of austenitic steel of 60 × 5 мм. Some tube samples had developed for measuring the temperature, stress-strain state of tube material and temperature field of coolant flow in mixing zone of single-phase coolants with different temperatures. Measuring tube samples were equipped with micro thermocouples and strain gauges.</p><p>The experimental data of temperature pulsations, time-averaged temperature field in the coolant flow and on the outer surface of the sample were obtained, and statistical and spectral correlation characteristics of temperature pulsations were analyzed. According to results of measuring the relative strain, values of stresses were calculated.</p><p>Devices and research techniques are developed. The combination of coolant flows parameters that provide thermal load of the metal surface at the highest level of stress intensity amplitude was obtained. The study results are used to verify the method for evaluating fatigue of reactor installations materials under stochastic temperature pulsations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>температурные пульсации</kwd><kwd>термоусталость</kwd><kwd>ресурс</kwd><kwd>тройниковый узел</kwd></kwd-group><kwd-group xml:lang="en"><kwd>temperature pulsations</kwd><kwd>thermal fatigue</kwd><kwd>metal durability</kwd><kwd>Y-junction</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Министерство образования и науки РФ (13.8823.2017/8.9).</funding-statement><funding-statement xml:lang="en">Ministry of Education and Science of the Russian Federation (Grant No. 8.2297.2017/4.6)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Судаков, А.В. 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