{"id":369762,"date":"2026-08-18T15:41:42","date_gmt":"2026-08-18T10:11:42","guid":{"rendered":"https:\/\/forumias.com\/blog\/?p=369762"},"modified":"2026-08-18T15:41:42","modified_gmt":"2026-08-18T10:11:42","slug":"rotating-detonation-engines-dres","status":"publish","type":"post","link":"https:\/\/forumias.com\/blog\/rotating-detonation-engines-dres\/","title":{"rendered":"Rotating Detonation Engines (DREs)"},"content":{"rendered":"<div class=\"content-box-green\">\n<p><strong>News:<\/strong> India-based defence start-up D-Propulse successfully demonstrated a Rotating Detonation Engine (RDE) at a Defence Research &amp; Development Organisation facility in Hyderabad.<\/p>\n<\/div>\n<h2 class=\"red-h2-box\">About Rotating Detonation Engines (DREs)<\/h2>\n<figure id=\"attachment_369765\" aria-describedby=\"caption-attachment-369765\" style=\"width: 386px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\" wp-image-369765\" src=\"https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/08\/Source-University-of-Texas.jpg?resize=386%2C279&#038;ssl=1\" alt=\"Rotating Detonation Engines (DREs)\" width=\"386\" height=\"279\" srcset=\"https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/08\/Source-University-of-Texas.jpg?resize=300%2C217&amp;ssl=1 300w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/08\/Source-University-of-Texas.jpg?w=727&amp;ssl=1 727w\" sizes=\"auto, (max-width: 386px) 100vw, 386px\" \/><figcaption id=\"caption-attachment-369765\" class=\"wp-caption-text\">Source &#8211; University of Texas<\/figcaption><\/figure>\n<ul>\n<li><strong>Detonation<\/strong> is a <strong>combustion process <\/strong>in which the<strong> flame travels through the fuel mixture faster than the speed of sound<\/strong>, unlike <strong>conventional<\/strong> combustion where the <strong>flame travels slower than the speed of sound<\/strong>.<\/li>\n<li><strong>Type of Detonation:<\/strong> Detonation engines can be <strong>Pulsed Detonation Engines (PDEs)<\/strong> or <strong>Rotating Detonation Engines (RDEs).<\/strong><\/li>\n<li><strong>Pulsed Detonation Engine (PDE):<\/strong> The detonation <strong>travels through a long tube and works in repeated cycles.<\/strong>\n<ul>\n<li>The tube is purged before the next cycle.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Rotating Detonation Engine (RDE):<\/strong> The detonation wave <strong>moves continuously in a circular path inside an annular chamber<\/strong>, so <strong>combustion<\/strong> can <strong>continue as long as fuel is supplied.<\/strong><\/li>\n<li><strong>Working Mechanism of RDE:<\/strong>\n<ul>\n<li><strong>Fuel and oxidizer<\/strong> are continuously<strong> injected<\/strong> into the narrow, ring-shaped chamber called<strong> &#8216;annulus&#8217;.<\/strong><\/li>\n<li>The <strong>detonation wave moves around the annulus at very high speed<\/strong> and <strong>rapidly compresses<\/strong> and <strong>burns<\/strong> the fresh <strong>fuel-air mixture.<\/strong><\/li>\n<li>The wave <strong>consumes the mixture and produces high-pressure, high-temperature gases.<\/strong>\n<ul>\n<li>Continuous fuel injection keeps the detonation going.<\/li>\n<\/ul>\n<\/li>\n<li>The combustion products are <strong>expelled through the nozzle<\/strong>, <strong>generating continuous thrust or mechanical energy.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Key Features of RDE:<\/strong>\n<ul>\n<li><strong>Higher Efficiency:<\/strong> RDEs can <strong>provide around 10%\u201325% higher thermodynamic efficiency<\/strong> than conventional combustors, depending on design and conditions.<\/li>\n<li><strong>Fuel Saving:<\/strong> A <strong>20% increase in thermodynamic efficiency<\/strong> could theoretically <strong>reduce fuel requirement by about 17%<\/strong> for the same output.<\/li>\n<li><strong>Compact Design:<\/strong> <strong>RDE combustors can be at least 40% shorter than standard rocket engines<\/strong>.<\/li>\n<li><strong>Propellant Flexibility:<\/strong> RDEs have been <strong>demonstrated with hypergolic and cryogenic propellants.<\/strong><\/li>\n<li><strong>Wide Applications: <\/strong>RDEs can be used for <strong>chemical propulsion, including rocket launches, in-space propulsion, and missions involving spacecraft such as upper stages, landers and Mars Ascent Vehicles<\/strong>.<\/li>\n<li><strong>Current Status: <\/strong>RDEs remain in the <strong>research and development stage,<\/strong> with <strong>no known models ready for commercial or military use.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>India\u2019s Progress:<\/strong> India-based <strong>defence start-up D-Propulse<\/strong> has successfully <strong>demonstrated an RDE at a DRDO facility in Hyderabad.<\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>News: India-based defence start-up D-Propulse successfully demonstrated a Rotating Detonation Engine (RDE) at a Defence Research &amp; Development Organisation facility in Hyderabad. About Rotating Detonation Engines (DREs) Detonation is a combustion process in which the flame travels through the fuel mixture faster than the speed of sound, unlike conventional combustion where the flame travels slower&hellip; <a class=\"more-link\" href=\"https:\/\/forumias.com\/blog\/rotating-detonation-engines-dres\/\">Continue reading <span class=\"screen-reader-text\">Rotating Detonation Engines (DREs)<\/span><\/a><\/p>\n","protected":false},"author":10401,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[1566,1738,12039],"tags":[11872],"class_list":["post-369762","post","type-post","status-publish","format-standard","hentry","category-daily-factly-articles","category-science-and-technology-daily-factly-articles","category-knolls","tag-9pm-daily-factly","entry"],"jetpack_featured_media_url":"","views":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/369762","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/users\/10401"}],"replies":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/comments?post=369762"}],"version-history":[{"count":0,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/369762\/revisions"}],"wp:attachment":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/media?parent=369762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/categories?post=369762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/tags?post=369762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}