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China Outer Space Science, Technology and Explorations: News & Updates

China航天
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23-7-16 19:49
发布于 海南

【探访JF-22超高速风洞】我国JF-22超高速风洞可以复现40至90公里高空、速度最高达每秒10公里、相当于约30倍声速的飞行条件。
中国科学院力学研究所研究员、怀柔激波风洞项目负责人 姜宗林：第一个尺度大。我们这个风洞吹出来这个流场有2.5米的直径，一般国外最大直径的话1.5米，这样的话你可以放更大的飞行器。第二个时间长。在马赫10的时候我们达到40个毫秒，比国内国际的同类先进水平大概要有几倍、成倍提高，实验的结果的精度也高了。第三个总温高，总压高，性能高。现在可以做到2500摄氏度到18000摄氏度，而总压的话，我们可以做到100个大气压一直到10000个大气压。所以这个性能的话在世界上没有其它风洞可以比的。
中国科学院力学研究所研究员、怀柔激波风洞现场负责人 韩桂来：我们最近正要研究两级或者多级入轨的这样一个飞行器，火箭是垂直起降，将来我们要通过飞行器水平起降，然后飞到比方说30公里到40公里高度，再把第二级释放出来，接着往上飞，形成这样一个接力的模式，叫两级或者多级入轨，所以最近我们也正在准备这样一个相应的分离方案的实验，主要就是来探索下面级跟上面级它产生一个分离的过程。
JF-12复现风洞和JF-22超高速风洞可分别实现每秒1.5-3km和每秒3-10km的实验条件，共同构成覆盖马赫数5-25、飞行高度25-90km的气动实验平台。
姜宗林：利用马赫数10比如说100多个大气压，40个毫秒的实验时间，我们可以做高超声速发动机试验。我们实验室提出一种新型的发动机，叫做驻定斜爆轰发动机。现在我们用JF-12已经做到马赫数7到马赫数9，现在看来的话，我们新型的发动机比传统的发动机热效率高，要高50%，燃烧稳定。JF-22准备从马赫数9一直做到马赫数16，如果有这样一个发动机做完之后，我觉得对我们国家下一步的航空航天技术是一个非常大的推动。
此外，科研团队还将利用这一激波风洞实验平台，展开滑翔式飞行器、天地往返飞行器、多级入轨飞行器等研究，支撑和服务国家高超声速科技领域重大需求和关键技术攻关。
姜宗林：到马赫数20这个层次，我们可以做高空滑翔飞行器，可以说是一个小时全球到达。如果我们做到马赫数30，实际上我们是航空器大气再入，比如说探火星、轨道飞行器回来之后再入大气层回来的时候用到这样一个马赫数。所以这个风洞覆盖了从航天到航空一直到探测器的整个范畴，所以具有很大的应用领域。全文“飞行器的摇篮”JF-22超高速风洞究竟是什么？长啥样？一文了解
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China Aerospace
23-7-16 19:49 Posted in Hainan

【Visiting JF-22 hypersonic speed wind tunnel】

China's JF-22 ultra-high-speed wind tunnel can reproduce flight conditions at an altitude of 40 to 90 kilometers and a speed of up to 10 kilometers per second, which is equivalent to about 30 times the speed of sound.

Speaking on its feature, Jiang Zonglin, researcher at the Institute of Mechanics, Chinese Academy of Sciences, and head of the Huairou Shock Tunnel Project:

First its diameter is larger. The flow field blown out by our wind tunnel has a diameter of 2.5 meters. Generally elsewhere abroad, the maximum diameter is 1.5 meters. In this way, you can put in a larger aircraft.

The second it has longer duration. At Mach 10, we reached 40 milliseconds, which is about several times higher than the domestic and international advanced level of the same type, and the accuracy of the experimental results is also high.

The third it has high total temperature, high total pressure and high performance. Now it can reach 2,500 degrees Celsius to 18,000 degrees Celsius, and in terms of total pressure, we can achieve 100 atmospheres until 10,000 atmospheres. So this performance is comparable to no other wind tunnel in the world.

Han Guilai, a researcher at the Institute of Mechanics of the Chinese Academy of Sciences and the site leader of the Huairou Shock Wave Wind Tunnel: We are currently studying an aircraft with two or more stages into orbit. Currently rocket can takes off and lands vertically. In the future, we will use the aircraft to take off and land horizontally, and then fly to an altitude of, say, 30 kilometers to 40 kilometers, release the second stage, and then fly upwards in a relay, which is called two-stage or multi-stage orbit entry, so we are also researching such system recently. The experiment of the separation scheme is mainly to explore the separation process between the lower level and the upper level.

The JF-12 reproduction wind tunnel and the JF-22 ultra-high-speed wind tunnel can realize the experimental conditions of 1.5-3km per second and 3-10km per second respectively, and together constitute an aerodynamic experiment covering Mach number 5-25 and flight altitude 25-90km platform.

Jiang Zonglin: With a Mach number of 10, say more than 100 atmospheres, and an experiment time of 40 milliseconds, we can conduct hypersonic engine tests. Our laboratory proposes a new type of engine called a stationary oblique detonation engine. Now we have achieved Mach number 7 to Mach number 9 with JF-12. Now it seems that our new engine has higher thermal efficiency than the traditional engine, which is 50% higher, and the combustion is stable. JF-22 is going to go from Mach 9 to Mach 16. If such an engine is completed, I think it will be a great impetus to our country's next step in aerospace technology.

In addition, the scientific research team will use this shock wave wind tunnel experimental platform to carry out research on gliding craft, space-to-earth shuttle craft, and multi-stage orbiting craft to support and serve the country's major needs in the field of hypersonic technology and others key technological research.

Jiang Zonglin: At the level of Mach 20, we can research high-altitude gliding aircraft, which can reach anywhere globally in an hour. If we achieve a Mach number of 30, we can research for example, the scenario when such a Mach number will be require when a Mars exploration probe re-enter earth atmosphere. Therefore, this wind tunnel covers the entire range from aviation to aerospace to space probe, so it has a wide range of applications.

Horizontal Takeoff Horizontal Landing craft
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Stationary oblique detonation engine
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China's new-generation rocket propellant tank successfully passed a cryogenic burst test Wednesday, proving its robustness under extreme environments. It is expected to be applied to the modified versions of China's Long March-7 and 8 carrier rockets.
https://twitter.com/x/status/1684730641458544640
 
How to use Huawei Mate60 to make a satellite call?
1. Search for a China's "Tiantong" satellite.
2. Connect it.
3. Just call.
#Huawei #HuaweiMate60Pro #SatelliteCall
https://twitter.com/x/status/1696849327811870754
From https://en.wikipedia.org/wiki/Tiantong_(Satellite)
the task of the satellite system is to provide all-weather, all-time, stable and reliable mobile communication services to users in China and its surrounding areas, the Middle East, Africa and most parts of the Pacific and Indian ocean
Click to expand...
 
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来自 微博视频号​
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【#商业航天电磁发射高温超导电动悬浮航行试验成功#】2023年9月7日，中国航天科工三院完成了商业航天电磁发射高温超导电动悬浮航行试验，本次试验在380米线路上实现了234公里/小时试验速度，创造了国内高温超导电动悬浮最高航行速度纪录！本次试验的成功标志着商业航天电磁发射高温超导技术取得了重大突破，基本具备了系统研制和试验能力。#科技强军 航天报国# 中国航天科工的微博视频​

China Aerospace Science and Industry Corp
23-9-8 22:31 from Weibo video account

[Commercial aerospace electromagnetic launch high-temperature superconducting electric suspension navigation test successful]

On September 7, 2023, the China Academy of Aerospace Science and Industry Corp completed the commercial aerospace electromagnetic launch high-temperature superconducting electric suspension navigation test. This test achieved a test speed of 234 kilometers per hour on a 380-meter line, created the domestic high-temperature superconducting electric levitation highest speed record! The success of this test marks a major breakthrough in high-temperature superconducting technology for commercial aerospace electromagnetic launch, and basically has acquire the ability to develop and test the system.
 
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来自 微博视频号​
关注​
【#日喀则40米口径射电望远镜开建#】#聊点科技# 记者从中国科学院获悉，在海拔4100米的高原，中国科学院上海天文台日喀则40米射电望远镜15日正式开工建设。它位于西藏自治区日喀则市西侧，是一架大型全可动高精度多用途射电望远镜，未来计划配备8个波段致冷接收机，具有1GHz到100GHz的观测能力。它将成为中国甚长基线干涉测量（VLBI）网的一个重要结点，承担我国探月四期和深空探测的测定轨任务，并促进我国射电天文科学观测研究发展。​
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根据探月工程四期测轨需求，我国将在西藏日喀则和吉林长白山建设两台40米口径的大型射电望远镜，形成“六站一中心”的中国VLBI网，未来将具备“双子网、双目标”能力。（光明日报全媒体记者齐芳）@光明日报 光明日报的微博视频​
Translated by Alibaba Cloud
The reporter learned from the Chinese Academy of Sciences that on the plateau at an altitude of 4100 meters, the construction of the Shigatse 40-meter radio telescope by the Shanghai Observatory of the Chinese Academy of Sciences officially started on the 15th. It is located on the west side of Xigaze City, Tibet Autonomous Region. It is a large fully movable high-precision multi-purpose radio telescope. In the future, it is planned to be equipped with 8-band refrigerated receivers with an observation capability of 1GHz to 100GHz. It will become an important node of China's Very Long Baseline Interferometry (VLBI) network, undertake the orbit determination tasks of China's fourth lunar exploration and deep space exploration, and promote the development of China's radio astronomy scientific observation and research.

According to the orbit measurement requirements of the fourth phase of the lunar exploration project, my country will build two large radio telescopes with a diameter of 40 meters in Xigaze, Tibet and Changbai Mountain, Jilin, forming a "six stations and one center" China VLBI network. "Double target" capability. (Qi Fang, all-media reporter of Guangming Daily)@光明日报http://t.cn/A6O9ddiC

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China's Wide-Field Survey Telescope Put into Operation​

Sep 17, 2023

A wide-field telescope capable of surveying the entire sky from the Northern Hemisphere was officially put into operation in northwest China's Qinghai Province on Sunday.
https://www.cctvplus.com/news/2023091...
 
China plans to expand its space station into six modules from the existing three in coming years, a researcher at the China Academy of Space Technology said. It will be at 180 tonnes after expansion, about 40% of the mass of the International Space Station.
https://twitter.com/x/status/1710384178389541002
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