{"id":16389,"date":"2024-04-24T12:32:56","date_gmt":"2024-04-24T12:32:56","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=16389"},"modified":"2024-04-26T15:05:57","modified_gmt":"2024-04-26T15:05:57","slug":"experimental-study-of-shock-shock-interferences-in-a-hypersonic-mach20-2-rarefied-flow","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/04\/24\/experimental-study-of-shock-shock-interferences-in-a-hypersonic-mach20-2-rarefied-flow\/","title":{"rendered":"Experimental Study of Shock\/Shock Interferences in a Hypersonic Mach20.2 Rarefied Flow"},"content":{"rendered":"\n<p><strong>Vincente Cardona, Viviana Lago<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST-2022-402<\/strong><\/p>\n\n\n\n<p>When a spacecraft re-enters Earth\u2019s atmosphere, or in the case of a destructive space debris re-entry, the<br>problem of proximal bodies is considered. In particular shock\/shock interferences can occur, and affect<br>the structure of the spacecraft or the debris aerodynamics. Depending on the altitude, endured flows<br>are hypersonic and rarefied, leading to predominant viscous effects. In order to better understand the<br>impact of rarefaction level on shock\/shock interferences, experiments were carried out in the MARHy<br>wind tunnel (ICARE, CNRS, France). A couple of spheres were placed in a hypersonic rarefied flow<br>with a free-stream Mach number of 20.2 and a free-stream pressure of 0.07 Pa. Different relative<br>positions were experimentally explored to identify various types of interferences occurring in this flow,<br>characteristic of an altitude of 95 km. Results, obtained with the discharge glow visualization method,<br>allowed the detection of shock waves and the analysis of intensity levels. They revealed that shock-<br>shock interferences show different behaviors than in a continuum regime or in a less rarefied flow.<br>Indeed shock waves do not seem to be affected by the interaction with an incident shock. However,<br>by analyzing the level of intensity near the interacting sphere, differences are observed according the<br>different positions. This statement is also true concerning the drag forces, measured on the second<br>sphere with the pendulum technique. This study shows that even if the shock\/shock interferences<br>are not clearly observed visually, the aerodynamics of the following sphere is modified according its<br>position towards the first one. As a consequence, it can be stated that during the atmospheric re-entry,<br>the shock\/shock interferences play a part on wall flux endured by the spacecraft structure and on the<br>modification of space debris trajectory.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/04\/HiSST-2022-402.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Vincente Cardona, Viviana Lago<\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST-2022-402<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1008,1006],"tags":[440,527,1292,632],"class_list":["post-16389","post","type-post","status-publish","format-standard","hentry","category-high-speed-aerodynamics-and-aerothermodynamics-hisst-2022","category-hisst-2022","tag-hypersonic","tag-rarefied-flow","tag-shock-shock-interferences","tag-wind-tunnel","category-1008","category-1006","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16389","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/comments?post=16389"}],"version-history":[{"count":2,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16389\/revisions"}],"predecessor-version":[{"id":16504,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16389\/revisions\/16504"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=16389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=16389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=16389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}