<?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>2215-3470</journal-id>
<journal-title><![CDATA[Uniciencia]]></journal-title>
<abbrev-journal-title><![CDATA[Uniciencia]]></abbrev-journal-title>
<issn>2215-3470</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional, Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-34702021000200096</article-id>
<article-id pub-id-type="doi">10.15359/ru.35-2.7</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de un difusor tipo wind lens en flujo turbulento]]></article-title>
<article-title xml:lang="pt"><![CDATA[Efeito de um difusor tipo wind lens em fluxo turbulento]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Richmond-Navarro]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casanova-Treto]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Castro]]></surname>
<given-names><![CDATA[Franklin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica Laboratorio de Investigación en Energía Eólica Escuela de Ingeniería Electromecánica]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Instituto de Investigaciones en Ingeniería(INII) Facultad de Ingeniería]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hochschule für Gestaltung Schwäbisch Gmünd Escuela de Ingeniería en Diseño Industrial Instituto Tecnológico de Costa Rica]]></institution>
<addr-line><![CDATA[Schwabisch Gmund ]]></addr-line>
<country>Germany</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>96</fpage>
<lpage>118</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-34702021000200096&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-34702021000200096&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-34702021000200096&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue medir el efecto de un concentrador de flujo tipo wind lens en el caso de flujo turbulento. El estudio se realizó en el túnel de viento de capa límite del Instituto de Investigación en Mecánica Aplicada de la Universidad de Kyushu, Japón, entre marzo y mayo de 2019. Se utilizó un anemómetro de hilo caliente con un mecanismo móvil para realizar tres pruebas. Primero se mide la velocidad en el eje del túnel, sin la rejilla de turbulencia instalada. En segundo lugar, se coloca la rejilla y se mide la intensidad de turbulencia en el eje del túnel de viento. En tercer lugar, se determina el efecto del WL en la velocidad del viento incidente, a diferentes niveles de intensidad de turbulencia. La velocidad del viento en el túnel sin la rejilla de turbulencia es casi constante, alrededor de 9.6 m/s. Al colocar la rejilla se registró en el eje del túnel de viento una intensidad de turbulencia decreciente, desde un valor de 28.6 % a 500 mm de la rejilla, hasta un 5 % de intensidad de turbulencia a 3 100 mm de la rejilla. Cuando se midió el efecto del wind lens en flujo turbulento, se obtuvo un aumento del 20 % o más en la velocidad del viento. El wind lens demostró ser adecuado para turbinas eólicas que operan en flujo turbulento, acrecentó la velocidad del viento en todas las pruebas, generando un mayor aumento a mayor intensidad de turbulencia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O objetivo foi medir o efeito de um concentrador de fluxo tipo wind lens no caso de fluxo turbulento. O estudo foi realizado no túnel de vento de camada limite do Instituto de Pesquisa em Mecânica Aplicada da Universidade de Kyushu, Japão, entre março e maio de 2019. Foi utilizado um anemômetro de fio quente com um mecanismo móvel para a realização de três testes. Primeiro, mede-se a velocidade no eixo do túnel, sem a grelha de turbulência instalada. Segundo, coloca-se a grelha e mede-se a intensidade de turbulência no eixo do túnel de vento. Em terceiro lugar, determina-se o efeito do WL na velocidade do vento incidente, em diferentes níveis de intensidade de turbulência. A velocidade do vento no túnel sem a grelha de turbulência é quase constante, aproximadamente 9,6 m/s. Ao colocar a grelha foi registrada no eixo do túnel de vento uma intensidade de turbulência decrescente, desde um valor de 28,6 % a 500 mm da grelha, até 5 % de intensidade de turbulência a 3 100 mm da grelha. Ao medir o efeito do wind lens em fluxo turbulento, obteve-se um aumento de 20 % ou mais na velocidade do vento. O wind lens mostrou ser ideal para turbinas eólicas que operam em fluxo turbulento, aumentou a velocidade do vento em todas os testes, gerando um maior aumento em uma maior intensidade de turbulência.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Wind lens]]></kwd>
<kwd lng="es"><![CDATA[concentrador de flujo]]></kwd>
<kwd lng="es"><![CDATA[flujo turbulento]]></kwd>
<kwd lng="es"><![CDATA[intensidad de turbulencia]]></kwd>
<kwd lng="pt"><![CDATA[Wind lens]]></kwd>
<kwd lng="pt"><![CDATA[concentrador de fluxo]]></kwd>
<kwd lng="pt"><![CDATA[fluxo turbulento]]></kwd>
<kwd lng="pt"><![CDATA[intensidade de turbulência.]]></kwd>
</kwd-group>
</article-meta>
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