<?xml version="1.0" encoding="ISO-8859-1"?><article 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">
<front>
<journal-meta>
<journal-id>0120-6230</journal-id>
<journal-title><![CDATA[Revista Facultad de Ingeniería Universidad de Antioquia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.fac.ing.univ. Antioquia]]></abbrev-journal-title>
<issn>0120-6230</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-62302022000300140</article-id>
<article-id pub-id-type="doi">10.17533/udea.redin.20210847</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Hidroituango intake gate closure - Emergency conditions]]></article-title>
<article-title xml:lang="es"><![CDATA[Hidroituango- Cierre de emergencia compuertas de aducción]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suárez]]></surname>
<given-names><![CDATA[Bladimir]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vera]]></surname>
<given-names><![CDATA[José David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Botero]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suarez]]></surname>
<given-names><![CDATA[Byron H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giraldo]]></surname>
<given-names><![CDATA[William]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Empresas Públicas de Medellín Unidad Operaciones Ituango ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Empresas Públicas de Medellín Unidad Ingeniería de Proyectos 1 ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad EAFIT Departamento de Ingeniería Mecánica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Empresas Públicas de Medellín Dirección Desarrollo Proyecto Ituango ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Empresas Públicas de Medellín Vicepresidencia Proyectos Generación Energía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<numero>104</numero>
<fpage>140</fpage>
<lpage>151</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-62302022000300140&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-62302022000300140&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-62302022000300140&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This article presents the investigation, analysis, and results of the intake gate closure of two vertical fixed-wheel gates at the hydroelectric project Ituango in Colombia (2400 MW) under free- flow conditions. This atypical operation was considered successful notwithstanding adverse conditions, and therefore, it can be classified as a unique operation in the field of hydraulic gates. In this article, some relevant parameters, such as the hydraulic force of the servomotor during the operation of the gate, were measured before and after the operation and analyzed, and the results were presented. A new chart is proposed for the downpull coefficient based on the collected data, which could be implemented in the closure of gates against the free flow. Considering the abovementioned factors, the authors propose some recommendations and present drawn conclusions contributing to state of the art on design, manufacturing, and operation of this type of hydraulic gates and structures for large and small dams under adverse and extreme conditions.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Este artículo presenta la investigación, análisis y resultados del cierre de emergencia de dos compuertas de aducción verticales en el proyecto hidroeléctrico Ituango en Colombia (2400 MW) bajo condiciones de flujo libre. Esta operación se consideró exitosa a pesar de las condiciones adversas y atípicas presentes al momento de ejecutar la maniobra por lo que se puede clasificar como una operación única en el campo de las compuertas hidráulicas. El artículo presenta resultados de algunos parámetros relevantes como la fuerza hidráulica del servomotor que se midió durante la operación y además fue analizado antes y después del cierre de las compuertas. Se propone un nuevo coeficiente de downpull con base en los datos recopilados, que podría implementarse en el cierre de compuertas contra flujo libre. Teniendo en cuenta los factores antes mencionados, los autores proponen algunas recomendaciones y presentan conclusiones extraídas que contribuyen al estado del arte en el diseño, fabricación y operación de este tipo de compuertas y estructuras hidráulicas para grandes y pequeñas presas en condiciones adversas y extremas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[hydraulic gates]]></kwd>
<kwd lng="en"><![CDATA[free flow closure]]></kwd>
<kwd lng="en"><![CDATA[hydrodynamic forces]]></kwd>
<kwd lng="en"><![CDATA[vibrations analysis]]></kwd>
<kwd lng="en"><![CDATA[aeration]]></kwd>
<kwd lng="es"><![CDATA[compuertas hidráulicas]]></kwd>
<kwd lng="es"><![CDATA[cierre a flujo libre]]></kwd>
<kwd lng="es"><![CDATA[fuerzas hidrodinámicas]]></kwd>
<kwd lng="es"><![CDATA[análisis de vibraciones]]></kwd>
<kwd lng="es"><![CDATA[aireación]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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