{"id":20862,"date":"2018-03-09T09:10:23","date_gmt":"2018-03-09T09:10:23","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/inestabilidad-de-combustion-en-motores-cohete-de-propulsante-solido\/"},"modified":"2018-03-09T09:10:23","modified_gmt":"2018-03-09T09:10:23","slug":"inestabilidad-de-combustion-en-motores-cohete-de-propulsante-solido","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/politecnica-de-madrid\/inestabilidad-de-combustion-en-motores-cohete-de-propulsante-solido\/","title":{"rendered":"Inestabilidad de combusti\u00f3n en motores cohete de propulsante s\u00f3lido"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Garc\u00eda Schafer Juan  Esteban <\/strong><\/h2>\n<p>Se describen las inestabilidades de combusti\u00f3n en motores de propulsante s\u00f3lido de combusi\u00f3n lateral analizando mediante m\u00e9todos de perturbaciones la interacci\u00f3n entre las oscilaciones ac\u00fasticas y el flujo b\u00e1sico casi-estacionario en c\u00e1maras esbeltas y con toberas cuya \u00e1rea de la garganta es mucho menor que el \u00e1re trasversal de la c\u00e1mara. Se realiza un an\u00e1lisis lineal de la estabilidad considerando peque\u00f1as perturbaciones, de tipo arm\u00f3nico, superpuestas al flujo b\u00e1sico en c\u00e1maras de combusti\u00f3n cil\u00edndricas circulares.  se analizan separadamente las oscilaciones longitudinales, con tiempos acusticos proporcionales a la longitud de la c\u00e1mara l, de las oscilaciones traversales, con tiempos ac\u00fasticos proporcionales al radio de la c\u00e1mara a, mucho m\u00e1s peque\u00f1os. Asociadas a las oscilaciones longitudinales , o de baja frecuencia se encuentran oscilaciones de vorticidad y de entrop\u00eda con longitudes de onda t\u00edpicamente peque\u00f1as comparadas con el radio de la c\u00e1mara y que penetran profundamente en ella. Usando t\u00e9cnicas de escalas m\u00faltiples, aprovechando la disparidad de escalas espacio-temporales presentes en el problema, se deducen las ecuaciones diferenciales que permiten calcular la dependencia axial y longitudinal de la amplitud de estas ondas. Las condiciones de contorno est\u00e1n determinadas por la admitancia ac\u00fastica del propulsante s\u00f3lido, que se obtiene de los an\u00e1lisis existentes de la capa delgada de reacci\u00f3n en fase gaseosa, y del an\u00e1lisis de la tobera que aqu\u00ed se realiza teniendo en cuenta las ondas de vorticidad y de entrop\u00eda. La ecuaciones se resuelven de forma cerrada proporcionando el exponente de estabilidad, el cual se usa para determinar las condiciones en las que se presenta la inestabilidad en las oscilaciones longitudinales.  las oscilaciones transversales, o de alta frecuencia, son, en primera aproximaci\u00f3n, las correspondientes a la ac\u00fastica cl\u00e1sica con una amplitud lentamente variable a lo l<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Inestabilidad de combusti\u00f3n en motores cohete de propulsante s\u00f3lido<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Inestabilidad de combusti\u00f3n en motores cohete de propulsante s\u00f3lido <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Garc\u00eda Schafer Juan  Esteban <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/12\/2002<\/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>Amable Li\u00f1an Mart\u00ednez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Salva monfort Jos\u00e9 Juan <\/li>\n<li> S\u00e1nchez p\u00e9rez Antonio  Luis (vocal)<\/li>\n<li> Vega de prada Jos\u00e9 Manuel (vocal)<\/li>\n<li>Antonio Barrero ripoll (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Garc\u00eda Schafer Juan Esteban Se describen las inestabilidades de combusti\u00f3n en motores de propulsante s\u00f3lido de combusi\u00f3n [&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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