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Photos of the Chinese Armed Forces

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11月7日,陆军第77集团军某合成旅在海拔4700多米的雪域高原进行48小时连贯演练考核,由10多个兵种组成的合成战斗群协调一致立体作战,没有脚本不设预案,根据实时更新的战场综合态势,构建立体火力打击网,全面锤炼部队在高原高寒条件下的作战能力。(中国军网英文版/郭朋 摄影报道)

On November 7, the army's 77th army brigade a synthesis in more than 4700 meters above sea level snow area plateau, 48 hours coherent exercise synthetic combat group composed of more than 10 units coordinated three-dimensional operations, no script without plan, according to comprehensive real-time update of battlefield situation, building three-dimensional fire hit the net, temper forces in an all-round way

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China builds world’s fastest wind tunnel to test weapons that could strike US within 14 minutes

Researchers want new facility to be up and running by 2020 as race to develop hypersonic technology intensifies

PUBLISHED : Wednesday, 15 November, 2017, 9:01pm
UPDATED : Thursday, 16 November, 2017, 12:14pm
By Stephen Chen - South China Morning Post


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China is testing a range of hypersonic aircraft, which can travel at many times the speed of sound. Photo: SCMP

China is building the world’s fastest wind tunnel to simulate hypersonic flight at speeds of up to 12 kilometres per second.

A hypersonic vehicle flying at this speed from China could reach the west coast of the United States in less than 14 minutes.

Zhao Wei, a senior scientist working on the project, said researchers aimed to have the facility up and running by around 2020 to meet the pressing demand of China’s hypersonic weapon development programme.

It will boost the engineering application of hypersonic technology, mostly in military sectors, by duplicating the environment of extreme hypersonic flights, so problems can be discovered and solved on the ground,” said Zhao, a deputy director of the State Key Laboratory of High Temperature Gas Dynamics at the Chinese Academy of Sciences in Beijing.

The ground tests will significantly reduce the risk of failure when test flights of hypersonic aircraft start.

The world’s most powerful wind tunnel at present is America’s LENX-X facility in Buffalo, New York state, which operates at speeds of up to 10 kilometres per second – 30 times the speed of sound.

Hypersonic aircraft are defined as vehicles that travel at speeds of Mach 5, five times the speed of sound, or above.

The US military tested HTV-2, a Mach 20 unmanned aircraft in 2011 but the hypersonic flight lasted only a few minutes before the vehicle crashed into the Pacific Ocean.

In March, China conducted seven successful test flights of its hypersonic glider WU-14, also known as the DF-ZF, at speeds of between Mach 5 and Mach 10.

Other countries including Russia, India and Australia have also tested some early prototypes of the aircraft, which could be used to deliver missiles including nuclear weapons.

China and the US have started a hypersonic race,” said Wu Dafang, professor at the school of aeronautic science and engineering at Beihang University in Beijing who received a national technology award for the invention of a new heat shield used on hypersonic vehicles in 2013.

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The JF-12 hypersonic wind tunnel near Beijing is able to replicate hypersonic flight conditions. Photo: SCMP

Wu has worked on the development of hypersonic cruise missiles, a near space vehicle, high-speed drones and other possible weapons for the People’s Liberation Army.

He said there were a number of hypersonic wind tunnels in mainland China which had helped ensure the high success rate of its hypersonic weapon tests.

The new wind tunnel will be “one of the most powerful and advanced ground test facilities for hypersonic vehicles in the world”, said Wu, who was not involved in the project.

“This is definitely good news for us. I look forward to its completion,” he added.

In the new tunnel there will be a test chamber with room for relatively large aircraft models with a wing span of almost three metres.

To generate an airflow at extremely high speeds, the researchers will detonate several tubes containing a mixture of oxygen, hydrogen and nitrogen gases to create a series of explosions that can discharge one gigawatt of power within a split second, according to Zhao.

This is more than half of the total power generation capacity of the Daya Bay nuclear power plant in Guangdong.

The shock waves, channelled into the test chamber through a metallic tunnel, will envelope the prototype vehicle and increase the temperature over its body to 8,000 Kelvins, or 7,727 degrees Celsius, Zhao said.

That is nearly 50 per cent hotter than the surface of the Sun.

The hypersonic vehicle therefore must be covered by special materials with extremely efficient cooling systems inside the airframe to dissipate the heat, otherwise it could easily veer off the course or disintegrate during a long-distance flight.

The new tunnel would also be used to test the scramjet, a new type of jet engine designed specifically for hypersonic flights. Traditional jet engines are not capable of handling air flows at such speeds.

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The JF-12 facility has been in operation since 2012, testing a variety of hypersonic weapons. Photo: SCMP

Zhao said the construction of the new facility would be led by the same team that built JF12, a hypervelocity denotation-driven shock tunnel in Beijing capable of duplicating flight conditions at speeds ranging from Mach 5 to Mach 9 at altitudes between 20 and 50 kilometres.

Jiang Zonglin, lead developer of the JF12, won the annual Ground Test Award issued by the American Institute of Aeronautics and Astronautics last year for advancing “state-of-the-art large-scale hypersonic test facilities”.

Jiang’s JF12 design “uses no moving parts and generates a longer test-duration and a higher energy flow than more traditionally designed tunnels”, according to the American institute.

According to state media reports, the JF12 tunnel has been operating at full capacity with a new test every two days since its completion in 2012 as the pace of hypersonic weapon development increased significantly in recent years.

In an article published in the domestic journal National Science Review last month, Jiang said the impact of hypersonic flights on society could be “revolutionary”.

With practical hypersonic aeroplanes, a two-hour flight to anywhere in the world will be possible” while the cost of space travel could be cut by 99 per cent with reusable spacecraft technology, Jiang wrote.

Hypersonic flight is, and in the foreseeable future will be, the driver of national security, and civilian transportation and space access,” he added.

The escape velocity, or the minimum speed needed to leave the Earth, is 11 kilometres per second.

http://www.scmp.com/news/china/policies-politics/article/2120072/china-builds-worlds-fastest-wind-tunnel-test-weapons

This article appeared in the South China Morning Post print edition as: Wind tunnel to give China edge in hypersonic tests

What's the Hypersonic Wind Tunnel? Why is it important?

"The Chinese nation is no longer satisfied with living like a farmer who eyes nothing but his own piece of land and a family to raise. We are looking up into space now."

Scramjet engines mix together air and liquid fuel at supersonic speeds, to result in the rapid combustion that propels aircraft and missiles at hypersonic speeds over Mach 5. In September 2015, Professor Wang Zhenguo received an award from the Chinese Society for Aeronautics and Astronautics (CSAA) for the successful development of China's first scramjet engine over the past decade.

China has the world's largest Hypersonic Wind Tunnel, the JF-12. The JF-12 can produce speeds of up to Mach 9 (NASA's Hypersonic Wind Tunnel reaches to only Mach 7). The JF-12 would provide Chinese scientists with a convenient way to observe supersonic airflow of different scramjet configurations, in addition to directly testing material durability in laboratory conditions, rather than having to make difficult and expensive high-altitude engine test flights.

And old article from October 2015, yet it's still worth of reading if one is new to this technology.

Chinese Hypersonic Engine Wins Award, Reshapes Speed Race? | Popular Science (2015)
https://www.popsci.com/chinese-hypersonic-engine-wins-award-reshapes-speed-race

A newer short footage on the China's Hypersonic Wind Tunnel (Sep 2017)
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China to complete building world's fastest wind tunnel in 2020

TECH & SCI
By Guo Meiping - CGTN
2017-11-21 14:57 GMT+8

China's Wind Tunnel 01.jpg


China is building a wind tunnel for advanced aircraft-testing which will be able to simulate hypersonic flight at speeds of up to 12 kilometers per second, considered the world’s fastest.

Zhao Wei, a senior scientist on the project, said that their goal is to complete the facility and have it operational by 2020, CCTV reported.

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A wind tunnel is a tool used in aerodynamic research to study the effects of air moving past solid objects. /Screenshot via CCTV

A wind tunnel is a tool used in aerodynamic research to study the effects of air moving past solid objects. The aircraft cannot move when tested on the ground, so the wind tunnel creates airflow that has the same speed as the aircraft to simulate flight conditions.

These ground tests help researchers to figure out issues connected to hypersonic aircraft and reduce the risk of failure before test flights start.

Hypersonic aircraft are defined as vehicles that travel at five times the speed of sound or above, CNBC reported.

Hypersonic aircraft are defined as vehicles that travel at 5X the speed of sound or above.jpg

Hypersonic aircraft are defined as vehicles that travel at five times the speed of sound or above. /Photo via Reuters

"The world-famous wind tunnel in the US can achieve four to seven times the speed of sound," said Jiang Zonglin, a researcher from the Chinese Academy of Sciences, adding that the Chinese one will be able to simulate aircraft at five to ten times the speed of sound.

"We want the next generation’s aircraft to achieve five times the speed of sound or above," Jiang told CCTV. "It will take only two hours flying from Beijing to New York if we succeed."

"It will change our lives by turning international travel to domestic travel," Jiang added.

https://news.cgtn.com/news/784d6a4d78637a6333566d54/share_p.html

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Watch this CGTN footage:
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DongFeng MengShi 东风猛士 Series in High-altitude test
dafeng cao 7:47 AM - 2 Dec 2017
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Watch the online video at the Tencent video site:
(just wait for a while for the ad to run)

铁血雄姿,东风猛士系列车型成果展在北京举行_腾讯视频
(Unshakeable majestic appearance,Dongfeng Mengshi Series -Model of the achieving vehicles being exhibited at Beijing)
https://v.qq.com/x/page/o05110zettj.html

OedoSoldier also shared at below - the lower resolution videos :D

DongFeng MengShi 东风猛士 Series in High-altitude test

Dongfeng Mengshi 东风猛士 Series - Motor Show at Beijing
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Dongfeng Mengshi modular vehicle is a family of "3rd generation motorized military vehicles" laying the foundation for the "next generation motorization" and accomplish full motorization of the PLA by 2020.
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Not a Mengshi but looks interesting
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Mengshi on display at 2016 Beijing International Auto Show
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From weibo, entries of military photography contest.

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赤胆忠心。作者:李三红
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党的光辉照兵心。作者:谭长俊
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中国梦 强军梦。作者:张凯
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喜马拉雅雄鹰。作者:刘应华

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在那遥远的天边边。作者:王宁
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月夜剑影。作者:宋远高
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踏破贺兰山阙。作者:王英楠
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反恐英雄王刚。作者:刘海山
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天宫望乡(组照)。作者:景海鹏、陈冬

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弯弓搭箭射天狼 作者  张建刚
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拼了 作者  杨再新
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长剑作笔画九天(组照) 作者 王晓予
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夜鹰呼啸震长空 作者  杨 盼
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电磁风暴(组照) 作者  马  冰
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我为祖国筑长城 作者  朱  伟
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潜机协同 作者  周演成
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朱日和:红蓝对抗战正酣(组照) 作者  张坤平​
 
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From weibo, entries of military photography contest.

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赤胆忠心。作者:李三红
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党的光辉照兵心。作者:谭长俊
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中国梦 强军梦。作者:张凯
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喜马拉雅雄鹰。作者:刘应华

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在那遥远的天边边。作者:王宁
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月夜剑影。作者:宋远高
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踏破贺兰山阙。作者:王英楠
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反恐英雄王刚。作者:刘海山
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天宫望乡(组照)。作者:景海鹏、陈冬

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弯弓搭箭射天狼 作者  张建刚
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拼了 作者  杨再新
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长剑作笔画九天(组照) 作者 王晓予
87e90f81ly1fm5hvxbekmj20b407xac4.jpg

夜鹰呼啸震长空 作者  杨 盼
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电磁风暴(组照) 作者  马  冰
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我为祖国筑长城 作者  朱  伟
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潜机协同 作者  周演成
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朱日和:红蓝对抗战正酣(组照) 作者  张坤平​
Wow! Many impressive photos for the annual contest. I picked some of those coolest pics to share among friends in the phone chat tool :enjoy:

Watch this clip: a Chinese soldier drives tank like sports car :D:P

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