<?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>0188-6266</journal-id>
<journal-title><![CDATA[Acta universitaria]]></journal-title>
<abbrev-journal-title><![CDATA[Acta univ]]></abbrev-journal-title>
<issn>0188-6266</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Guanajuato, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-62662016000200043</article-id>
<article-id pub-id-type="doi">10.15174/au.2016.991</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis del déficit de flujo en un ventilador de tiro forzado: propuestas de modificación geométrica al diseño original]]></article-title>
<article-title xml:lang="en"><![CDATA[Flow shortfall analysis in a forced-draft fan: proposals of geometrical changes for the original design]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zaleta-Aguilar]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Belman-Flores]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Trujillo]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez-Vargas]]></surname>
<given-names><![CDATA[L. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gámez-Arredondo]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guanajuato División de Ingenierías Departamento de Ingeniería Mecánica]]></institution>
<addr-line><![CDATA[Salamanca Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<volume>26</volume>
<numero>2</numero>
<fpage>43</fpage>
<lpage>54</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-62662016000200043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-62662016000200043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-62662016000200043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En este trabajo se presenta el análisis fluidodinámico mediante Dinámica de Fluidos Computacional (CFD, por sus siglas en inglés) de un ventilador de tiro forzado, el cual ha sido modificado en su diseño original debido a la carencia de flujo volumétrico observado durante su operación. El análisis se inicia con la caracterización termodinámica del ventilador, partiendo de las modificaciones geométricas propuestas como aumento del álabe y el aumento del diámetro del rotor, encontrando con esto un flujo de 8800 m3/min. El siguiente análisis está relacionado con la influencia de la velocidad y presión del flujo de aire a la salida del ventilador a causa del aumento de la velocidad angular y potencia. Del análisis se obtiene una velocidad angular de 1185 rpm, una velocidad a la descarga de 25 m/s, con una presión total de 5.44 kPa; mientras que a la velocidad angular propuesta, estos valores son cercanos a 30 m/s y 7.5 kPa. Con el fin de verificar que las modificaciones propuestas al ventilador no presenten daños al equipo por efectos de vibración, se desarrolló un análisis por elemento finito con la finalidad de encontrar las frecuencias naturales y los modos de vibración. Para una frecuencia de operación de 19.75 Hz (1185 rpm) se obtuvieron cuatro frecuencias naturales, de las cuales las más cercanas son de 18.52 Hz y 18.58 Hz, mismas que se encuentran apenas por debajo de la frecuencia de operación. Con este estudio, se concluye que las modificaciones propuestas a la geometría del ventilador son adecuadas para su operación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This paper presents fluid dynamic analysis through computational fluid dynamics (CFD) in a forced draft fan which has been modified from its original design due to its lack of volumetric flow observed during its operation. The analysis started with thermodynamic characterization of the fan, beginning from the proposed geometrical modifications like the increase of the blade size and the diameter of the rotor, achieving a flow of 8800 m3/min. Next analysis is related to influence of speed and pressure of the air flow to the fan outlet due of the increase of angular speed and potential. An angular speed of 1185 rpm and a discharge speed of 25m/s were obtained from the analysis with a total pressure of 5.44 kPa; while at the proposed angular speed, these values are closed to 30m/s and 7.5 kPa. With aim to verify that the proposed modification do not damage the fan by vibration, a finite element analysis was developed with purpose of finding natural frequencies and vibration modes. For an operation frequency of 19.75Hz (1185 rpm), 4 natural frequencies were obtained in the analysis, in which the closest frequencies are of 18.52 Hz and 18.58 Hz, which are barely below the operation frequency. This study concluded that the proposed modifications to the geometry of the fan are adequate for its operation.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Centrifugal fan]]></kwd>
<kwd lng="en"><![CDATA[thermodynamic analysis]]></kwd>
<kwd lng="en"><![CDATA[simulation]]></kwd>
<kwd lng="en"><![CDATA[CFD]]></kwd>
<kwd lng="en"><![CDATA[flow]]></kwd>
<kwd lng="es"><![CDATA[Ventilador centrífugo]]></kwd>
<kwd lng="es"><![CDATA[análisis termodinámico]]></kwd>
<kwd lng="es"><![CDATA[simulación]]></kwd>
<kwd lng="es"><![CDATA[CFD]]></kwd>
<kwd lng="es"><![CDATA[flujo]]></kwd>
</kwd-group>
</article-meta>
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