{"id":86114,"date":"2018-03-10T00:10:38","date_gmt":"2018-03-10T00:10:38","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/a-vibratory-approach-to-cavitation-erosion-prediction\/"},"modified":"2018-03-10T00:10:38","modified_gmt":"2018-03-10T00:10:38","slug":"a-vibratory-approach-to-cavitation-erosion-prediction","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/a-vibratory-approach-to-cavitation-erosion-prediction\/","title":{"rendered":"A vibratory approach to cavitation erosion prediction"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Francesc Xavier Escaler Puigoriol <\/strong><\/h2>\n<p>Este trabajo ha permitido demostrar que un metodo sencillo basado en las vibraciones inducidas por la cavitaci\u00f3n permite predecir el riesgo de erosi\u00f3n de la cavitaci\u00f3n en el laboratorio. El metodo consiste en la caracterizaci\u00f3n de la intensidad y de la velocidad de producci\u00f3n de colapsos de cavidades de vapor actuando en el s\u00f3lido mediante las vibraciones que se inducen en la estructura mec\u00e1nica. A partir de estas vibraciones, el valor absoluto de las fuerzas asociadas a los impactos que participan en el proceso se estima mediante el uso de funciones de transferencia que relacionan las fuentes de excitaci\u00f3n con la respuesta medida. Finalmente, la determinaci\u00f3n de una relaci\u00f3n fuerza-da\u00f1o para un material determinado nos permite calcular las areas de los agujeros causadas por las fuerzas que ocurren por encima de un nivel minimo a partir del cual se inicia el da\u00f1o, durante un cierto periodo de tiempo. Con esta informaci\u00f3n, se puede calcular el periodo minimo de tiempo antes de que el da\u00f1o cubra toda la superficie afectada por la cavitaci\u00f3n y de esta forma poder predecir la aparici\u00f3n de una cavitaci\u00f3n severa.  el \u00e9xito de esta metodolog\u00eda reside en el conocimiento previo de la resistencia del material al tipo de excitaci\u00f3n que interviene en el proceso de erosi\u00f3n. un generador de v\u00f3rtices permite someter al material a impactos de individuales de colapsos de v\u00f3rtice. Ensayos de corta duraci\u00f3n nos permiten establecer la correlaci\u00f3n directa entre las fuerzas de los impactos i el numero de agujeros. De esta forma, tambi\u00e9n se puede establecer el nivel minimo de a partir del cual el material sufre el primer da\u00f1o. Los impactos debidos a la cavitaci\u00f3n se detectan con la presencia de la fase de vapor cerca de la superficie del s\u00f3lido. Se miden las aceleraciones resultantes y las fuerzas correspondientes de los impactos se aproximan con las funciones de transmisibilidad calculadas mediante un martillo instrumentado. Los agu<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>A vibratory approach to cavitation erosion prediction<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 A vibratory approach to cavitation erosion prediction <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Francesc Xavier Escaler Puigoriol <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/07\/2000<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Eduardo Egusquiza Estevez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: francois Avellan <\/li>\n<li>Carlos Santolaria morros (vocal)<\/li>\n<li>eugenio Valencia leonardo (vocal)<\/li>\n<li>josep Dolz ripoll\u00e9s (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Francesc Xavier Escaler Puigoriol Este trabajo ha permitido demostrar que un metodo sencillo basado en las vibraciones [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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