{"id":64945,"date":"2024-12-02T11:17:00","date_gmt":"2024-12-02T10:17:00","guid":{"rendered":"https:\/\/xometry.pro\/stories\/trace-transpiration-cooling-technology\/"},"modified":"2024-12-02T12:23:46","modified_gmt":"2024-12-02T11:23:46","slug":"trace-refroidissement-par-transpiration","status":"publish","type":"stories","link":"https:\/\/xometry.pro\/fr\/temoignages\/trace-refroidissement-par-transpiration\/","title":{"rendered":"TRACE, ou le refroidissement par transpiration pour la conqu\u00eate de l\u2019espace"},"content":{"rendered":"<div role=\"navigation\" aria-label=\"Table des mati\u00e8res\" class=\"simpletoc wp-block-simpletoc-toc\"><h2 class=\"simpletoc-title\">Table des mati\u00e8res<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#h-refroidissement-par-transpiration-une-alternative-prometteuse\">Refroidissement par transpiration : une alternative prometteuse<\/a>\n\n<\/li>\n<li><a href=\"#h-trace-de-l-idee-au-prototype\">TRACE : de l\u2019id\u00e9e au prototype<\/a>\n\n<\/li>\n<li><a href=\"#h-une-innovation-technique-majeure\">Une innovation technique majeure<\/a>\n\n<\/li>\n<li><a href=\"#h-conseils-pour-les-innovateurs-de-demain\">Conseils pour les innovateurs de demain<\/a>\n<\/li><\/ul><\/div>\n\n\n<p>TRACE, acronyme de <strong>TRAnspiration Cooling Experiment<\/strong>, vise \u00e0 tester une technologie de refroidissement par transpiration pour les boucliers thermiques. L\u2019exp\u00e9rience repose sur une unit\u00e9 autonome (FFU) largu\u00e9e depuis une fus\u00e9e pour mesurer la dissipation thermique lors de la rentr\u00e9e atmosph\u00e9rique \u00e0 des vitesses pouvant atteindre <a href=\"#Mach3.2\">Mach 3,2<\/a>. L\u2019objectif est d\u2019optimiser la gestion thermique des engins spatiaux lors de leur retour sur Terre. Le refroidissement par transpiration repr\u00e9sente une alternative r\u00e9utilisable et efficace aux boucliers thermiques classiques, ouvrant la voie \u00e0 une r\u00e9duction des co\u00fbts et des mat\u00e9riaux n\u00e9cessaires pour les missions futures.<\/p>\n\n\n    <aside data-id=\"Mach3.2\" class=\"aside-popup\">\r\n        <div class=\"popup-content\">\r\n            <div class=\"popup-close-btn\">\r\n                <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/themes\/xometry\/assets\/images\/cross.svg\" alt=\"close-popup\">\r\n            <\/div>\r\n            <div>\r\n                <div class=\"popup-text\">Mach 3,2 correspond \u00e0 une vitesse 3,2 fois sup\u00e9rieure \u00e0 celle du son, soit environ 3 920 km\/h \u00e0 basse altitude, typique des rentr\u00e9es atmosph\u00e9riques \u00e0 haute vitesse.<\/div>            <\/div>\r\n                    <\/div>\r\n    <\/aside>\r\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-refroidissement-par-transpiration-une-alternative-prometteuse\"><strong>Refroidissement par transpiration : une alternative prometteuse<\/strong><\/h2>\n\n\n\n<p>Les boucliers thermiques sont cruciaux pour les engins spatiaux destin\u00e9s \u00e0 atterrir sur d\u2019autres plan\u00e8tes ou \u00e0 revenir sur Terre. Ils dissipent l\u2019\u00e9nergie cin\u00e9tique g\u00e9n\u00e9r\u00e9e par la rentr\u00e9e orbitale, prot\u00e9geant ainsi la structure des charges a\u00e9rodynamiques et thermiques extr\u00eames. Aujourd\u2019hui, les syst\u00e8mes de protection thermique sont souvent \u00e0 usage unique ou n\u00e9cessitent une maintenance complexe, limitant leur r\u00e9utilisabilit\u00e9 dans un contexte o\u00f9 la durabilit\u00e9 est essentielle.<\/p>\n\n\n\n<p>Le refroidissement par transpiration constitue une r\u00e9volution par rapport aux syst\u00e8mes ablatifs, qui utilisent la pyrolyse destructrice pour g\u00e9rer la chaleur. Un gaz est expuls\u00e9 \u00e0 travers la surface de l\u2019engin, formant une couche protectrice qui r\u00e9duit les charges thermiques extr\u00eames durant la rentr\u00e9e.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"685\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team-1024x685.png\" alt=\"Part of the TRACE team at the roll-out of the REXUS 31 rocket during the launch campaign\" class=\"wp-image-64678\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team-1024x685.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team-300x201.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team-768x514.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team-1536x1027.png 1536w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team.png 1865w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team.png\" data-fancybox=\"gallery-64945\" data-caption=\"Membres de l&#039;\u00e9quipe TRACE lors du d\u00e9ploiement de la fus\u00e9e REXUS 31 pendant la campagne de lancement\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/trace-team.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Membres de l&rsquo;\u00e9quipe TRACE lors du d\u00e9ploiement de la fus\u00e9e REXUS 31 pendant la campagne de lancement<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-trace-de-l-idee-au-prototype\"><strong>TRACE : de l\u2019id\u00e9e au prototype<\/strong><\/h2>\n\n\n\n<p>TRACE trouve son origine dans un m\u00e9moire de licence men\u00e9 en collaboration avec le <a href=\"https:\/\/www.dlr.de\/en\" target=\"_blank\" rel=\"noreferrer noopener\">Centre a\u00e9rospatial allemand (DLR)<\/a>. Cette premi\u00e8re \u00e9tude explorait la faisabilit\u00e9 d\u2019un syst\u00e8me de refroidissement par transpiration pour une application sur une fus\u00e9e REXUS. \u00c0 partir de cette base th\u00e9orique, nous avons fix\u00e9 des objectifs exp\u00e9rimentaux concrets, transformant ces concepts en composants testables.<\/p>\n\n\n\n<p>Le d\u00e9veloppement du projet TRACE a n\u00e9cessit\u00e9 de surmonter plusieurs d\u00e9fis techniques :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Miniaturisation<\/strong> : Int\u00e9grer tous les syst\u00e8mes dans une capsule compacte sans compromis sur les performances.<\/li>\n\n\n\n<li><strong>D\u00e9ploiement du parachute<\/strong> : Garantir une ouverture stable et contr\u00f4l\u00e9e \u00e0 des vitesses supersoniques.<\/li>\n\n\n\n<li><strong>A\u00e9rodynamique<\/strong> : Optimiser la forme de la capsule pour r\u00e9duire la tra\u00een\u00e9e et maintenir une trajectoire stable.<\/li>\n\n\n\n<li><strong>D\u00e9lais de production<\/strong> : R\u00e9organiser les plannings pour continuer \u00e0 avancer malgr\u00e9 les retards impr\u00e9vus.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"776\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace-1024x776.png\" alt=\"CAD model of TRACE\" class=\"wp-image-64666\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace-1024x776.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace-300x227.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace-768x582.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace.png 1262w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace.png\" data-fancybox=\"gallery-64945\" data-caption=\"Mod\u00e8le CAO de TRACE\" aria-label=\"Ouvrir l&#039;image compl\u00e8te\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/11\/cad-model-trace.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Mod\u00e8le CAO de TRACE<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-une-innovation-technique-majeure\"><strong>Une innovation technique majeure<\/strong><\/h2>\n\n\n\n<p>TRACE int\u00e8gre des avanc\u00e9es techniques de pointe pour r\u00e9pondre aux exigences extr\u00eames des tests en rentr\u00e9e atmosph\u00e9rique. La capsule est con\u00e7ue pour atteindre <a href=\"#Mach3\">Mach 3<\/a>, g\u00e9n\u00e9rant des conditions thermiques intenses dans l\u2019atmosph\u00e8re dense, permettant ainsi de tester le syst\u00e8me de refroidissement. Son coefficient balistique \u00e9lev\u00e9 garantit une stabilit\u00e9 et une vitesse maintenue tout au long de la descente.<\/p>\n\n\n\n<p>Le syst\u00e8me de refroidissement par transpiration utilise de l\u2019argon pour prot\u00e9ger les surfaces expos\u00e9es \u00e0 la chaleur, pr\u00e9servant la structure des charges thermiques s\u00e9v\u00e8res. De plus, un parachute supersonique, capable de se d\u00e9ployer \u00e0 <a href=\"#Mach2\">Mach 2<\/a> \u00e0 environ 10 km d\u2019altitude, assure une descente contr\u00f4l\u00e9e et la transmission fiable des donn\u00e9es.<\/p>\n\n\n    <aside data-id=\"Mach3\" class=\"aside-popup\">\r\n        <div class=\"popup-content\">\r\n            <div class=\"popup-close-btn\">\r\n                <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/themes\/xometry\/assets\/images\/cross.svg\" alt=\"close-popup\">\r\n            <\/div>\r\n            <div>\r\n                <div class=\"popup-text\">Environ 3 675 km\/h \u00e0 basse altitude<\/div>            <\/div>\r\n                    <\/div>\r\n    <\/aside>\r\n\n\n    <aside data-id=\"Mach2\" class=\"aside-popup\">\r\n        <div class=\"popup-content\">\r\n            <div class=\"popup-close-btn\">\r\n                <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/themes\/xometry\/assets\/images\/cross.svg\" alt=\"close-popup\">\r\n            <\/div>\r\n            <div>\r\n                <div class=\"popup-text\">Environ 2 450 km\/h \u00e0 basse altitude<\/div>            <\/div>\r\n                    <\/div>\r\n    <\/aside>\r\n\n\n<div id=\"yW5oGMSsS_s-69f9a95837fe4\" data-video-id=\"yW5oGMSsS_s\" class=\"ma-gdpr-youtube-wrapper\" style=\"width:100%;height:56.25%;padding-top:56.25%;\" data-new-window=\"\" data-yt-parameters=\"WyJtYXgtd2lkdGg9XHUyMDFjNzAwcHhcIiJd\"><picture class=\"ma-gdpr-youtube-thumbnail\"><source media=\"(min-width:320px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/yW5oGMSsS_s\/yW5oGMSsS_s_sddefault.webp\"><source media=\"(min-width:320px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/yW5oGMSsS_s\/yW5oGMSsS_s_sddefault.jpg\"><source media=\"(min-width:240px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/yW5oGMSsS_s\/yW5oGMSsS_s_hqdefault.webp\"><source media=\"(min-width:240px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/yW5oGMSsS_s\/yW5oGMSsS_s_hqdefault.jpg\"><img decoding=\"async\" src=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/yW5oGMSsS_s\/yW5oGMSsS_s_mqdefault.jpg\" alt=\"\" title=\"\"><\/picture><svg class=\"ma-gdpr-youtube-button\"><use xlink:href=\"#ma-gdpr-youtube-play-button\"><\/use><\/svg><div class=\"ma-gdpr-youtube-notice\" style=\"font-size:.7em;\"><\/div><\/div>\n\n\n\n<p>TRACE se distingue par ses caract\u00e9ristiques novatrices, comme l\u2019int\u00e9gration d\u2019un des premiers tests en vol d\u2019un syst\u00e8me de refroidissement par transpiration pour boucliers thermiques. Son design compact, r\u00e9alis\u00e9 en impression 3D m\u00e9tal \u00e0 partir de titane Grade 5 (Ti6Al4V), illustre la pr\u00e9cision et la polyvalence des proc\u00e9d\u00e9s de fabrication additive avanc\u00e9s.<\/p>\n\n\n\n<p>De plus, le parachute supersonique, con\u00e7u pour un d\u00e9ploiement \u00e0 Mach 2, garantit une descente s\u00e9curis\u00e9e et permet une transmission de donn\u00e9es fiable, m\u00eame dans des conditions de vitesse extr\u00eame.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conseils-pour-les-innovateurs-de-demain\"><strong>Conseils pour les innovateurs de demain<\/strong><\/h2>\n\n\n\n<p>Nous sommes fiers d\u2019avoir men\u00e9 TRACE \u00e0 son lancement depuis <a href=\"https:\/\/www.esa.int\/Education\/Rexus_Bexus\/Eight_student_experiments_launched_on_sounding_rockets\" target=\"_blank\" rel=\"noreferrer noopener\">Esrange (Su\u00e8de) en mars 2024<\/a>. Ce succ\u00e8s a demand\u00e9 une pr\u00e9cision technique exceptionnelle et un engagement sans faille. Les d\u00e9fis rencontr\u00e9s ont renforc\u00e9 la r\u00e9silience de notre \u00e9quipe et ont rendu cette exp\u00e9rience particuli\u00e8rement enrichissante.<\/p>\n\n\n\n<p>Pour la suite, nous pr\u00e9parons TRACER, une \u00e9volution de TRACE int\u00e9gr\u00e9e directement \u00e0 la fus\u00e9e. Ce projet permettra de tester plusieurs fluides de refroidissement et de simplifier l\u2019accessibilit\u00e9 des composants.<\/p>\n\n\n\n<p>Pour toute \u00e9quipe d\u00e9butant un projet similaire, notre conseil est de prototyper et tester le plus t\u00f4t possible. Adoptez une approche it\u00e9rative et agile, en restant flexible face aux r\u00e9sultats. C\u2019est la cl\u00e9 pour r\u00e9ussir tout projet ambitieux.<\/p>\n\n\n\n<p>En savoir plus sur le <a href=\"https:\/\/www.spaceteamaachen.de\/projects\/trace\" target=\"_blank\" rel=\"noreferrer noopener\">projet TRACE<\/a> et l&rsquo;universit\u00e9 <a href=\"https:\/\/www.spaceteamaachen.de\/\" target=\"_blank\" rel=\"noreferrer noopener\">Space Team Aachen<\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-alpha-channel-opacity has-background\" style=\"background-color:#f5f7f8;color:#f5f7f8\"\/>\n\n\n\n<p><strong>Et vous ? Avez-vous travaill\u00e9 sur des syst\u00e8mes pour l\u2019a\u00e9rospatiale, comme la gestion thermique ou la propulsion ? <\/strong>Partagez vos id\u00e9es et exp\u00e9riences pour cr\u00e9er les prochaines g\u00e9n\u00e9rations d\u2019engins spatiaux r\u00e9utilisables !<\/p>\n\n\n\n<p><\/p>\n","protected":false},"author":50,"featured_media":64695,"comment_status":"open","ping_status":"closed","template":"","c-tag-stories":[1652],"global-tag":[485],"class_list":["post-64945","stories","type-stories","status-publish","has-post-thumbnail","hentry","c-tag-stories-aerospatial","global-tag-impression-3d"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Le refroidissement par transpiration pour la conqu\u00eate de l\u2019espace | Xometry Pro<\/title>\n<meta name=\"description\" content=\"Bonjour, je m&#039;appelle Till, ing\u00e9nieur m\u00e9canique sur le 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