Science Alert<\/a>. Acest proces poate provoca un fenomen denumit \u201eblowoff\u201d, care, \u00een anumite condi\u021bii, poate stinge flac\u0103ra.<\/p>\n\u00cen contrast, pe Lun\u0103, de\u0219i exist\u0103 un flux de gaze, acesta se desf\u0103\u0219oar\u0103 mult mai lent. Aceast\u0103 caracteristic\u0103 permite fl\u0103c\u0103rii s\u0103 fie alimentat\u0103 constant cu oxigen, f\u0103r\u0103 a genera o mi\u0219care suficient de rapid\u0103 a vaporilor care s\u0103 conduc\u0103 la apari\u021bia blowoff-ului. Astfel, materiale care pe P\u0103m\u00e2nt nu sunt considerate inflamabile ar putea arde mult timp \u00een condi\u021biile lunare.<\/p>\n
Testul NASA-STD-6001B<\/h2>\n
De zeci de ani, NASA utilizeaz\u0103 un test denumit NASA-STD-6001B pentru a evalua inflamabilitatea materialelor destinate zborului. Acest test impune men\u021binerea unei fl\u0103c\u0103ri de \u0219ase inci la baza unui material montat vertical. Dac\u0103 flac\u0103ra ajunge s\u0103 ard\u0103 de la o distan\u021b\u0103 mai mare de \u0219ase inci sau dac\u0103 materialul picur\u0103 resturi \u00een fl\u0103c\u0103ri, acesta nu trece testul.<\/p>\n
\u00cen medii terestre, aerul se mi\u0219c\u0103 \u0219i genereaz\u0103 curen\u021bi convectivi, av\u00e2nd o direc\u021bie clar\u0103 \u201esus\u201d \u0219i \u201ejos\u201d. \u00cen schimb, \u00een loca\u021bii precum Sta\u021bia Spa\u021bial\u0103 Interna\u021bional\u0103, orient\u0103rile nu mai exist\u0103. Astfel, \u00een microgravita\u021bie, fl\u0103c\u0103rile nu se \u00eendreapt\u0103 \u201e\u00een sus\u201d, ci formeaz\u0103 pete sferice care se extind lent, alimentate aproape exclusiv de sistemele de ventila\u021bie ale sta\u021biei.<\/p>\n
Fenomene fizice ciudate<\/h2>\n
Pentru a explora aceste aspecte, NASA a efectuat anterior testul Spacecraft Fire Safety (Saffire). Aceste experimente au avut loc \u00een interiorul unei capsule de marf\u0103 Cygnus, dup\u0103 ce aceasta a fost deta\u0219at\u0103 de ISS \u0219i \u00eenainte de a reintra \u00een atmosfera P\u0103m\u00e2ntului. \u00cen timpul acestor teste, cercet\u0103torii au aprins foi mari de bumbac, fibr\u0103 de sticl\u0103, \u021bes\u0103turi \u0219i acril, observ\u00e2nd comportamentul lor \u00een microgravita\u021bie.<\/p>\n
Rezultatele au relevat fenomene fizice neobi\u0219nuite, fl\u0103c\u0103rile uneori r\u0103sp\u00e2ndindu-se \u00een direc\u021bia opus\u0103 curentului de aer \u0219i arz\u00e2nd mai intens pe materialele mai sub\u021biri. Datele ob\u021binute din aceste experimente au subliniat discrepan\u021bele dintre standardele NASA \u0219i realitatea incendiilor \u00een spa\u021biu.<\/p>\n
Noul proiect pl\u0103nuit de NASA<\/h2>\n
\u00cen acest context, experimentul \u201eFlammability of Materials on the Moon\u201d (FM2) devine crucial. Datorit\u0103 gravita\u021biei mai reduse de pe Lun\u0103, acesta ofer\u0103 un cadru ideal pentru studierea dinamicii fl\u0103c\u0103rilor. FM2 va fi integrat \u00eentr-o misiune Commercial Lunar Payload Service (CLPS), av\u00e2nd ca scop explorarea comportamentului materialelor \u00een condi\u021bii lunare.<\/p>\n
O camer\u0103 autonom\u0103 va fi utilizat\u0103 pentru a arde patru probe de combustibil solid \u00een condi\u021bii de gravita\u021bie lunar\u0103 de lung\u0103 durat\u0103, o experien\u021b\u0103 imposibil de replicat \u00een prezent pe P\u0103m\u00e2nt. Camera va fi dotat\u0103 cu camere video, radiometre \u0219i senzori de oxigen, permi\u021b\u00e2nd monitorizarea fl\u0103c\u0103rii \u0219i a atmosferei \u00een timp real.<\/p>\n
Acest experiment va oferi o prim\u0103 leg\u0103tur\u0103 \u00eentre comportamentul teoretic al fl\u0103c\u0103rii \u00een gravita\u021bie par\u021bial\u0103 \u0219i observa\u021biile realizate \u00een condi\u021bii de gravita\u021bie zero \u0219i 1G din studii anterioare.<\/p>\n","protected":false},"excerpt":{"rendered":"
Cercet\u0103torii de la Centrul de Cercetare Glenn \u0219i Centrul Spa\u021bial Johnson al NASA, \u00eempreun\u0103 cu speciali\u0219ti de la Universitatea Case Western Reserve, au elaborat un articol captivant care detaliaz\u0103 o misiune inovatoare. Aceasta vizeaz\u0103 testarea inflamabilit\u0103\u021bii materialelor de pe suprafa\u021ba Lunii, un mediu \u00een care focul ar putea avea un comportament complet diferit fa\u021b\u0103 de […]<\/p>\n","protected":false},"author":2,"featured_media":14916,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":[],"jnews_primary_category":[],"jnews_override_counter":[],"footnotes":""},"categories":[39],"tags":[2094,17398,5486,17397,13938,17399,4287,8502],"class_list":["post-14915","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stirile-zilei","tag-cercetare","tag-flacara","tag-gravitatie","tag-inflamabilitate","tag-luna","tag-materiale","tag-misiune","tag-nasa"],"_links":{"self":[{"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/posts\/14915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/comments?post=14915"}],"version-history":[{"count":0,"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/posts\/14915\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/media\/14916"}],"wp:attachment":[{"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/media?parent=14915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/categories?post=14915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsrecorder.ro\/app\/wp-json\/wp\/v2\/tags?post=14915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}