{"id":36229,"date":"2023-08-21T12:20:27","date_gmt":"2023-08-21T10:20:27","guid":{"rendered":"https:\/\/deftech.ch\/?p=36229"},"modified":"2023-08-21T12:28:56","modified_gmt":"2023-08-21T10:28:56","slug":"china-successfully-tests-most-powerful-mach-30-wind-tunnel","status":"publish","type":"post","link":"https:\/\/deftech.ch\/de\/2023\/08\/21\/china-successfully-tests-most-powerful-mach-30-wind-tunnel\/","title":{"rendered":"China successfully tests &#8220;most powerful&#8221; Mach 30 wind tunnel"},"content":{"rendered":"<p>In mid-July the government of the People&#8217;s Republic of China released a video showing what it claims is the<a href=\"https:\/\/www.eurasiantimes.com\/blistering-at-mach-30-china-tests-worlds-most-powerful\/#:~:text=Home%20Asia%20Pacific-,At%20Blistering%20Speeds%20Of%20Mach%2030%2C%20China%20Tests%20World%27s%20%27Most,Wind%20Tunnel%20For%20Mothership%20Aircraft&amp;text=Amid%20intensifying%20hypersonic%20race%2C%20the,wind%20tunnel%20in%20the%20world.%E2%80%9D\"> world\u2019s most powerful wind tunnel<\/a> being used to conduct a scale separation test of what <em><a href=\"https:\/\/www.thedrive.com\/the-war-zone\/chinas-new-mach-30-wind-tunnel-tests-space-plane-mothership-design\">The Drive reports<\/a><\/em> could be an air-launched space plan design from a mothership aircraft.<\/p>\n<figure id=\"attachment_36238\" aria-describedby=\"caption-attachment-36238\" style=\"width: 300px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-36238 size-medium\" src=\"https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/JF_22-video-300x166.png\" alt=\"\" width=\"300\" height=\"166\" srcset=\"https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/JF_22-video-300x166.png 300w, https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/JF_22-video-1024x567.png 1024w, https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/JF_22-video-768x425.png 768w, https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/JF_22-video.png 1080w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-36238\" class=\"wp-caption-text\">Video of the oblique detonation wave aired on Chinese media. Source: Twitter <a href=\"https:\/\/www.thedrive.com\/the-war-zone\/chinas-new-mach-30-wind-tunnel-tests-space-plane-mothership-design\">via The Drive<\/a><\/figcaption><\/figure>\n<p>The video was broadcast on the state-run China Central Television\u2019s Channel 13, which is the country\u2019s largest 24-hour television news network. Clips of the video appeared on social media soon thereafter. The video highlighted three interesting developments related to the PRC\u2019s approach to and prioritization of hypersonic vehicles\u2014not just hypersonic weapons but also aircraft that can lower the cost and increase the frequency and flexibility of space launches.<\/p>\n<p><strong>Facility: <\/strong>The first development of interest is the validation that the JF-22 hypervelocity tunnel is, in fact, operational. The facility has been under development since 2018 and has garnered considerable attention in domestic press and among the \u201cChina Watching\u201d community. While the Institute of Mechanics of the Chinese Academy of Science (CAS) did announce last month that the JF-22 facility had passed an \u201cacceptance check\u201d in which 16 experts from diverse institutes and organizations approved the facility for use, this was the first known test using the JF-22.<\/p>\n<figure id=\"attachment_36230\" aria-describedby=\"caption-attachment-36230\" style=\"width: 300px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-36230 size-medium\" src=\"https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/jf-22-wind-tunnel-handout-300x200.webp\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/jf-22-wind-tunnel-handout-300x200.webp 300w, https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/jf-22-wind-tunnel-handout-1024x683.webp 1024w, https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/jf-22-wind-tunnel-handout-768x512.webp 768w, https:\/\/deftech.ch\/wp-content\/uploads\/2023\/08\/jf-22-wind-tunnel-handout.webp 1098w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-36230\" class=\"wp-caption-text\">An image of the JF-22 wind tunnel. Source: JF-22 handout as published on <a href=\"https:\/\/www.thedrive.com\/the-war-zone\/chinas-new-mach-30-wind-tunnel-tests-space-plane-mothership-design\">The Drive<\/a><\/figcaption><\/figure>\n<p>At just under 548 feet and with a test cabin of 13 feet in diameter, the tunnel is longer and more advanced than the JF-12 wind tunnel with which it is collocated, and which has been an important component of China\u2019s hypersonic development to date. Chinese officials have stressed that the JF-22 uses a novel approach that involves using chemical expositions to crate hypersonic conditions while facilities in other states rely on mechanical compressors to produce high-speed airflow. The reported advantages help to simulate flights at higher altitudes and speeds (up to Mach 30) where fuel is burned much faster.<\/p>\n<p><strong>Shcramjet: <\/strong>The videos also contains footage of the high-speed oblique detonation wave engine, known as a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Shcramjet\">shcramjet<\/a> (an acronym for shock induced combustion ramjet and also referred to as Oblique Detonation Wave Engine (ODWE). Shcramjet engines should not be confused with scramjet engines, which provide another mechanism for achieving and sustaining hypersonic speeds.<\/p>\n<p>While scramjet concepts rely on the diffusive burning of injected fuel, shcramjets seek to avoid a long combustion chamber by injecting the fuel in the inlet of the vehicle and burning the fuel\/air mixture through a shock wave. This reduces the weight of the engine and, as a result, reduces the overall weight the hypersonic vehicle and takes advantage of the typically long inlets found at hypersonic velocities. Shcramjets, then, are more efficient than scramjet engines and are also believed to have a better overall propulsive performance than the scramjet at higher Mach numbers, especially above Mach 10.<\/p>\n<p><strong>Air-Launched Orbital Aircraft Concept: <\/strong>The wind tunnel and use of shcramjet technologies are likely to support China\u2019s space ambitions generally and efforts to develop a two-stage mothership space launch concept and capability.<\/p>\n<p>Indeed, the video showed a scaled down delta-winged and dart-shaped platform that, according to <em>The Drive<\/em>,<a href=\"https:\/\/www.thedrive.com\/the-war-zone\/chinas-new-mach-30-wind-tunnel-tests-space-plane-mothership-design\"> \u201clooks similar, in very broad strokes, to air-launched spaceplane and mothership concepts that Chinese aerospace companies and academic institutions have shown publicly in the past.\u201d<\/a><\/p>\n<p>The two-stage concept involves a mothership\u2014usually a reusable space plane capable of landing on conventional runways\u2014carrying a spacecraft to a very high altitude at which point the spacecraft is launched into space using its own propulsion. These motherships can use advanced high-speed air breathing engines such as shcramjets to increase the speed of launch. Two-stage launches increase the flexibility of launch as it does not require a large static infrastructure or time to prepare for launch. The concept can also reduce costs of space launch by as much as 90%, <a href=\"https:\/\/www.eurasiantimes.com\/blistering-at-mach-30-china-tests-worlds-most-powerful\/#:~:text=Home%20Asia%20Pacific-,At%20Blistering%20Speeds%20Of%20Mach%2030%2C%20China%20Tests%20World%27s%20%27Most,Wind%20Tunnel%20For%20Mothership%20Aircraft&amp;text=Amid%20intensifying%20hypersonic%20race%2C%20the,wind%20tunnel%20in%20the%20world.%E2%80%9D\">according to <em>The EurAsian Times<\/em><\/a><em>. <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In mid-July the government of the People&rsquo;s Republic of China released a video showing what it claims is the world&rsquo;s most powerful wind tunnel being used to conduct a scale separation test of what The Drive reports could be an air-launched space plan design from a mothership aircraft. The video was broadcast on the state-run [&#8230;]\n","protected":false},"author":5,"featured_media":36269,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[120,118],"tags":[],"class_list":["post-36229","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energy-and-propulsion","category-space"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>China successfully tests &quot;most powerful&quot; Mach 30 wind tunnel - Deftech \u00b7 Defence Future Technologies<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"China successfully tests &quot;most powerful&quot; Mach 30 wind tunnel - Deftech \u00b7 Defence Future Technologies\" \/>\n<meta property=\"og:description\" content=\"In mid-July the government of the People&rsquo;s Republic of China released a video showing what it claims is the world&rsquo;s most powerful wind tunnel being used to conduct a scale separation test of what The Drive reports could be an air-launched space plan design from a mothership aircraft. 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