{"id":2052,"date":"2017-06-30T15:58:07","date_gmt":"2017-06-30T18:58:07","guid":{"rendered":"https:\/\/www.nachodelatorre.com.ar\/mosconi\/?p=2052"},"modified":"2017-06-30T15:58:07","modified_gmt":"2017-06-30T18:58:07","slug":"metodologia-para-variar-las-curvas-de-empuje-de-propulsantes-solidos-a-traves-de-la-introduccion-de-membranas-de-alta-conduccion-termica-en-el-grano","status":"publish","type":"post","link":"https:\/\/www.fie.undef.edu.ar\/ceptm\/?p=2052","title":{"rendered":"Metodolog\u00eda para variar las curvas de empuje de propulsantes s\u00f3lidos a trav\u00e9s de la introducci\u00f3n de membranas de alta conducci\u00f3n t\u00e9rmica en el grano"},"content":{"rendered":"<p>Esta es una patente reciente donde se describe una metodolog\u00eda para lograr modificar las curvas de empuje de propulsantes s\u00f3lidos (PS) sin modificar su geometr\u00eda. En esta metodolog\u00eda se procede a la carga del propulsante en el motor, aprovechando todo el volumen disponible, sin dejar espacios libres, hasta obtener un cilindro s\u00f3lido, dentro del cual se introduce una o varias membranas de material de alta conductividad t\u00e9rmica. Al iniciar la combusti\u00f3n en la cara libre del PS, como un cigarro, las membranas transmiten selectivamente el frente de llama al interior del grano, cumpliendo la funci\u00f3n hasta ahora s\u00f3lo posible a trav\u00e9s de moldear o extrudar el propulsante con una forma adecuada. La metodolog\u00eda tradicional deja espacios vac\u00edos dentro del motor, con lo que la densidad de carga disminuye. Una alternativa anterior usaba cables met\u00e1licos embebidos en el grano, pero esta patente describe el empleo de membranas polim\u00e9ricas, recubiertas con alg\u00fan metal introducidas en la masa del PS con la forma que me interese darle para obtener la curva de empuje adecuada a mis necesidades.<!--more--><\/p>\n<p>I. Field of the Invention<\/p>\n<p>&nbsp;<\/p>\n<div class=\"description-line\">The present invention relates generally to a solid propellant grain.<\/div>\n<div class=\"description-line\"><\/div>\n<div class=\"description-line\">II. Description of Related Art<\/div>\n<p>&nbsp;<\/p>\n<div id=\"p-0006\" class=\"description-line\">Solid rocket propellants are used in many different rocket motors, especially for military applications. The solid propellant is ignited and creates a combustion zone on the propellant grain surface. The generated combustion gases create thrust via gas mass flow through the rocket nozzle, which provides propulsion for the solid rocket motor. Thrust over time (\u201cthrust profile\u201d) is typically controlled by selection of desirable solid propellant burn rates and the geometry of the solid propellant grain. High thrust levels or complex thrust profiles usually require unique grain configurations such that the burning surface area coupled with propellant regression can achieve the desired gas mass flow. Achieving such grain surface areas requires internal passageways through the solid propellant, resulting in more free volume and less solid propellant within the confines of the combustion chamber. Such solid propellant grains result in low loading densities and reduced ranges.<\/div>\n<p>&nbsp;<\/p>\n<div id=\"p-0007\" class=\"description-line\">One alternative is the end-burning solid propellant grain, where the propellant can fill virtually the entire combustion chamber. This has the highest loading density of any solid propellant grain, but also has the lowest initial surface area since just the flat end is exposed toward the rocket nozzle. Typical end-burning solid rocket motors result in long burn times but very low mass flow rate. Many rocket motors require much higher thrust levels to meet mission requirements.<\/div>\n<div class=\"description-line\"><\/div>\n<div class=\"description-line\" style=\"text-align: right;\"><em><strong><a href=\"https:\/\/www.google.com\/patents\/US20170096968\" target=\"_blank\" rel=\"noopener noreferrer\">Leer mas &gt;&gt;<\/a><\/strong><\/em><\/div>\n<p>&nbsp;<\/p>\n<p><strong>Fuente:<\/strong> <em><a href=\"https:\/\/www.google.com\/patents\/US20170096968\">https:\/\/www.google.com\/patents\/US20170096968<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Esta es una patente reciente donde se describe una metodolog\u00eda para lograr modificar las curvas de empuje de propulsantes s\u00f3lidos (PS) sin modificar su geometr\u00eda.&hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[29,24],"tags":[],"_links":{"self":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/2052"}],"collection":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2052"}],"version-history":[{"count":0,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/2052\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2052"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2052"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2052"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}