{"id":28482,"date":"2004-03-02T00:00:00","date_gmt":"2004-03-02T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-numerico-de-la-histeresis-y-cargas-laterales-en-toberas-de-motor-cohete-de-empuje-optimo-sobreexpansionadas\/"},"modified":"2004-03-02T00:00:00","modified_gmt":"2004-03-02T00:00:00","slug":"estudio-numerico-de-la-histeresis-y-cargas-laterales-en-toberas-de-motor-cohete-de-empuje-optimo-sobreexpansionadas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/politecnica-de-madrid\/estudio-numerico-de-la-histeresis-y-cargas-laterales-en-toberas-de-motor-cohete-de-empuje-optimo-sobreexpansionadas\/","title":{"rendered":"Estudio numerico de la histeresis y cargas laterales en toberas de motor cohete de empuje optimo sobreexpansionadas"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Mori\u00f1igo Madue\u00f1o Jos\u00e9 Antonio <\/strong><\/h2>\n<p>El presente trabajo num\u00e9rico analiza los fenom\u00e9nos de hist\u00e9resis, modos de separaci\u00f3n y transicic\u00f3n entre ellos observados en un tipo especifico de toberas conocido como empuje \u00f3ptimo (toc) en sobre-expansi\u00f3n, propias de motores cohete de lanzadores en su operaci\u00f3n a nivel de mar. El estudio se centra en la tobera sub-escala j-2s 1:16 ensayada con aire seco. Mediante simulaci\u00f3n num\u00e9rica de fluidos, se profundiza en la fenomenolog\u00eda citada y en la aparici\u00f3n de fuertes cargas laterales durante los  transitorios de arranque y parada del motor , estando el estudio soportado por los resultados experimentales disponibles. Como punto de partida, la realizaci\u00f3n de simulaciones rans 2d-axisim\u00e9tricas estacionarias ha permitido clarificar el papel desempe\u00f1ado por la onda de choque interna nacida en la vecindad de la garganta de la tobera en la formaci\u00f3n y configuraci\u00f3n del patr\u00f3n de ondas de choque denominado cap-shock.  adem\u00e1s, las similaciones rans 2d.Axisim\u00e9tricas no.Estacionarias de los transitorios de operaci\u00f3n de la tobera han permitido indagar en la no-estacionariedad del flujo y evoluci\u00f3n de la configuraci\u00f3n  de ondas de choque presentes en el divergente. Los resultados revelan la existencia de una transici\u00f3n hacia la situaci\u00f3n de flujo readherido (transitrio de arranque) y otra hacia la situaci\u00f3n de flujo separado (transitorio de parada). El nacimiento de la gran bolsa  de recirculaci\u00f3n sobre el eje  aguas abajo del cap-shock y subsiguiente crecimiento constituyen fen\u00f3menos analizados, postul\u00e1ndose un criterio de nacimiento de la misma de acuerdo con el comportamiento observado.  en el contexto de las simulaciones 2d-axisim\u00e9tricas, el bucle de hisr\u00e9resis visible en el mapa de eficiencia del empuje, as\u00ed como los perfiles de presi\u00f3n sobre la pared para varios ratios de presi\u00f3n de c\u00e1mara (nprs), muestran un buen ajuste con los ensayos.  las simulaciones rans 2d y 3d no-estacionarias han puesto de manifies<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio numerico de la histeresis y cargas laterales en toberas de motor cohete de empuje optimo sobreexpansionadas<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio numerico de la histeresis y cargas laterales en toberas de motor cohete de empuje optimo sobreexpansionadas <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Mori\u00f1igo Madue\u00f1o Jos\u00e9 Antonio <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 03\/02\/2004<\/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> Salva Monfort Jos\u00e9 Juan<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: amable Li\u00f1an Martinez <\/li>\n<li> Sanchez perez  Antonio  Luis (vocal)<\/li>\n<li>Antonio Crespo Martinez (vocal)<\/li>\n<li>Antonio Lecuona neumann (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mori\u00f1igo Madue\u00f1o Jos\u00e9 Antonio El presente trabajo num\u00e9rico analiza los fenom\u00e9nos de hist\u00e9resis, modos de separaci\u00f3n y [&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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