China's Space Program News Thread


nabla

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Xi'an Aerospace Propulsion Institute of CASC has apparently
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, intended for a single-stage reusable space plane.
OpenFOAM mentioned in the slides is a popular fluid/gas dynamics simulation package. The fact that this software is mentioned here makes me to think that these slides are related to developing computational models for flow of air in ramjet engines, or something like that. It looks more like a piece of theoretical work than an immediate "real world" engineering application.
 

taxiya

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Xi'an Aerospace Propulsion Institute of CASC has apparently
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, intended for a single-stage reusable space plane.

View attachment 63805
View attachment 63806
Corrections:
  • It is 2 stage to space as you can see from the last picture.
  • It is not RBCC (Rocket Based Combined Cycle) which does not have a turbine. There is no RBCC program in China as far as I can gather. Actually RBCC concept was never seriously considered by Chinese according to this paper "Analysis of Key Technologies and Propulsion Performance Research of TRRE Engine" published by 11th institute in Beijing in 2017.
  • It is almost certain that this tested engine is TRRE (Turbo-aided Rocket-augmented Ram⁃jet Combined Cycle Engine) which is studied above because the test was conducted by 11th institute in Xi'an which is the other office of 11th institute besides the one in Beijing. Same developer same program.
Speculation:
It was said in the article that you posted
2020年金秋清晨,位于我国西北的某靶场上,伴随着巨大的响声,一支穿云箭划破宁静,缕缕白烟在蓝天与黄沙的映衬下分外惹眼,仿佛架起天与地连接的桥梁。
The bold texts indicated that the engine or test craft was launched by a rocket. This indicates that the engine was only tested in the Ramjet->Rocket Inducted transition->Scramjet regime, excluding the turbine powered phase (Ma 1 to 2). It means that they have not built a flyable air-frame with autonomous flight control system that could enable taking off horizontally from a runway. That should be the next milestone for use to watch.

Connecting the dots:
  • The spacecraft (spaceplane) launched days ago was the 2nd stage of the combo in your last picture. It uses rocket engine to enter LEO after departing from the carrier aircraft.
  • The newly tested engine is to be used by the 1st stage carrier aircraft in the 3rd step.
  • Now we are beginning to see the puzzles being put together.
 

taxiya

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OpenFOAM mentioned in the slides is a popular fluid/gas dynamics simulation package. The fact that this software is mentioned here makes me to think that these slides are related to developing computational models for flow of air in ramjet engines, or something like that. It looks more like a piece of theoretical work than an immediate "real world" engineering application.
I don't get your reasoning. Here is the slide you mentioned.

I agree with the other words you said except the bold texts. OpenFOAM is one of three modules in their software package to support whatever real world engine development. Actually it is not even the most demanding tool as you can see that it is called "general purpose module". The other SW packages are categorized as "subsonic combustion module" and "supersonic combustion module" which are certainly more demanding. The three are put together to provide a development platform. It is like developing python or Matlab libraries for computational studies of Orion spacecraft reentry.

If you say that this person and his team is not directly involved in any real world engine development program, I agree. But I am certain that his work is one of the many ground-laying works that support or enable many ongoing engine programs including the just tested TRRE engine.
 
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taxiya

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Registered Member
Corrections:
  • It is 2 stage to space as you can see from the last picture.
  • It is not RBCC (Rocket Based Combined Cycle) which does not have a turbine. There is no RBCC program in China as far as I can gather. Actually RBCC concept was never seriously considered by Chinese according to this paper "Analysis of Key Technologies and Propulsion Performance Research of TRRE Engine" published by 11th institute in Beijing in 2017.
  • It is almost certain that this tested engine is TRRE (Turbo-aided Rocket-augmented Ram⁃jet Combined Cycle Engine) which is studied above because the test was conducted by 11th institute in Xi'an which is the other office of 11th institute besides the one in Beijing. Same developer same program.
Speculation:
It was said in the article that you posted

The bold texts indicated that the engine or test craft was launched by a rocket. This indicates that the engine was only tested in the Ramjet->Rocket Inducted transition->Scramjet regime, excluding the turbine powered phase (Ma 1 to 2). It means that they have not built a flyable air-frame with autonomous flight control system that could enable taking off horizontally from a runway. That should be the next milestone for use to watch.

Connecting the dots:
  • The spacecraft (spaceplane) launched days ago was the 2nd stage of the combo in your last picture. It uses rocket engine to enter LEO after departing from the carrier aircraft.
  • The newly tested engine is to be used by the 1st stage carrier aircraft in the 3rd step.
  • Now we are beginning to see the puzzles being put together.
@by78 I made a mistake in my "corrections", so here is the corrections to it. I hope I don't need to make more corrections. :p
  • It is not RBCC (Rocket Based Combined Cycle) which does not have a turbine. There is no RBCC program in China as far as I can gather. Actually RBCC concept was never seriously considered by Chinese according to this paper "Analysis of Key Technologies and Propulsion Performance Research of TRRE Engine" published by 11th institute in Beijing in 2017.
  • It is almost certain that this tested engine is TRRE (Turbo-aided Rocket-augmented Ram⁃jet Combined Cycle Engine) which is studied above because the test was conducted by 11th institute in Xi'an which is the other office of 11th institute besides the one in Beijing. Same developer same program.
The TRRE proposal was by 31st institute of Beijing which is a member of CASIC. The 11th institute in Beijing is on the other hand member of CASC, it has its counter part in Xi'an who was in the test.

Whether the tested engine is RBCC or TRRE is unclear, although RBCC was never heard in open channel, it could be that CASC did an extremely good job in keeping secret.
 

taxiya

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Registered Member
It appears to be TBRCC Turbine Based Rocket Combined Cycle.
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provides a in depth background in Chinese.
It is called TRRE by the developer. TBRCC is probably the invention of this poster himself "脑补". You can take a look at this publication
"Analysis of Key Technologies and Propulsion Performance Research of TRRE Engine"
1600882459277.png
The poster even copied the same illustration. His description also exactly fit the paper.
1600882526898.png

Another "脑补" or stretchy part of the post is the linking to Xiamen University's program. That is impossible.
1. The xiamen launching platform only launched a frontal portion of a wave-rider model. It was not an engine. It was very small.
2. This CASC test is an engine which fired and sustained flight for at least part of its intended regime.
 
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Errys

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2020-09-22

Recently, China’s aerospace has made a number of breakthroughs, the most interesting of which was on September 15, when my country used the Long March 11 carrier rocket to successfully send nine "Jilin-1" satellites into it at the same time. Sun synchronous orbit. For this satellite launch mission, I believe that many people do not have much expectation after being excited. After all, our country has realized the dream of multiple stars with one stone a few years ago. The reason why the "Jilin No. 1" satellite has made a global sensation this time is because Changguang Satellite Company recently exposed a video. The true strength of

has been exposed, and Jilin-1 has attracted global attention. In the video of
a fighter is flying at high speed. Although the flight trajectory of the fighter is disturbed by a thick layer of cloud and fog, the "Jilin-1" satellite still flies steadily. The fighters in China were followed and monitored. After the video was released, some netizens judged from the vague outline that this is a US military F-22 stealth fighter, because its inverted trapezoidal main wing and horizontal tail are highly similar to the US F-22.

is the most advanced fifth-generation aircraft in the world. The F-22 fighter of the U.S. Army has excellent stealth capabilities. It is difficult for ordinary fire control radars to detect its presence. Although the long-range warning radar can detect the traces of stealth fighters, Because the accuracy is too low, the missile cannot be guided to attack it. The "Jilin No. 1" satellite not only found the F-22, but also tracked live shooting throughout the entire process, which provided countries around the world with a new idea of anti-stealth fighters.

It is understood that the "Jilin One" satellite is generally deployed in a sun-synchronous orbit 535 kilometers from the ground. The U.S. F-22 stealth fighter has a flying altitude of 10,000 to 20,000 meters, which means that the distance between the "Jilin One" satellite and the F-22 fighter is at least 500 kilometers. At such a long distance, the "Jilin No. 1" satellite can still identify and track, which also makes countries around the world realize the practical significance of optical remote sensing satellites. After the video was exposed, the Royal Academy said in amazement: The air defense system currently equipped in China is sufficient to weaken the combat effectiveness of the US F-22 and F-35. With the development of China's air defense technology, it is likely to overtake the United States and Russia in one fell swoop.

surprised! "Jilin One" is not used in the military field?
In fact, the main task of the "Jilin One" optical remote sensing satellite is to monitor and analyze my country's agricultural and forestry resources. Because of the high resolution of this kind of satellite, which can reach 0.5-1 meters, it is often used in land surveying and mapping, urban construction, and transportation planning.

According to the plan, Changguang Satellite plans to launch a total of 138 Jilin satellites by 2030. By then, the Jilin-1 constellation will be able to detect any point on the earth every ten minutes, even if it is flying extremely fast. The fifth-generation sonic aircraft cannot escape the "golden eyes" of the "Jilin-1" satellite. In response to this extremely powerful detection capability, some netizens claimed that the "Jilin No. 1" had opened a "sky eye."

How strong is the "Jilin No. 1" with a "God Perspective"?
It is understood that this is not the first time that "Jilin One" has discovered a military target. Earlier, the "Jilin-1" satellite broadcast live broadcast of the entire process of the US aircraft carrier's arrival in the port, and also "live broadcast" the entire process of the US military P-8A maritime patrol plane taking off at the airport. Because this kind of satellite can continuously shoot video images with an accuracy of less than 1 meter, the "Jilin No. 1" undoubtedly opens up a "God's perspective" for enemy targets, and can monitor their every move during a certain period of time.

However, because the current number of "Jilin-1" satellites is relatively small, and the time to "revisit" the target is relatively long, it is impossible to monitor the target's whereabouts around the clock, which leaves time for the enemy target to escape. However, when the number of satellites increases to 138, this problem will be completely resolved.

All in all, the "Jilin Satellite" detected a suspected US F-22 aircraft, which is of great significance for future research on anti-stealth fighter equipment. With the development of science and technology, the future is likely to break the US military "stealth myth", so that the US military F-22 and F-35 have nowhere to hide, let us wait and see.
 

halflife3

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2020-09-22

Recently, China’s aerospace has made a number of breakthroughs, the most interesting of which was on September 15, when my country used the Long March 11 carrier rocket to successfully send nine "Jilin-1" satellites into it at the same time. Sun synchronous orbit. For this satellite launch mission, I believe that many people do not have much expectation after being excited. After all, our country has realized the dream of multiple stars with one stone a few years ago. The reason why the "Jilin No. 1" satellite has made a global sensation this time is because Changguang Satellite Company recently exposed a video. The true strength of

has been exposed, and Jilin-1 has attracted global attention. In the video of
a fighter is flying at high speed. Although the flight trajectory of the fighter is disturbed by a thick layer of cloud and fog, the "Jilin-1" satellite still flies steadily. The fighters in China were followed and monitored. After the video was released, some netizens judged from the vague outline that this is a US military F-22 stealth fighter, because its inverted trapezoidal main wing and horizontal tail are highly similar to the US F-22.

is the most advanced fifth-generation aircraft in the world. The F-22 fighter of the U.S. Army has excellent stealth capabilities. It is difficult for ordinary fire control radars to detect its presence. Although the long-range warning radar can detect the traces of stealth fighters, Because the accuracy is too low, the missile cannot be guided to attack it. The "Jilin No. 1" satellite not only found the F-22, but also tracked live shooting throughout the entire process, which provided countries around the world with a new idea of anti-stealth fighters.

It is understood that the "Jilin One" satellite is generally deployed in a sun-synchronous orbit 535 kilometers from the ground. The U.S. F-22 stealth fighter has a flying altitude of 10,000 to 20,000 meters, which means that the distance between the "Jilin One" satellite and the F-22 fighter is at least 500 kilometers. At such a long distance, the "Jilin No. 1" satellite can still identify and track, which also makes countries around the world realize the practical significance of optical remote sensing satellites. After the video was exposed, the Royal Academy said in amazement: The air defense system currently equipped in China is sufficient to weaken the combat effectiveness of the US F-22 and F-35. With the development of China's air defense technology, it is likely to overtake the United States and Russia in one fell swoop.

surprised! "Jilin One" is not used in the military field?
In fact, the main task of the "Jilin One" optical remote sensing satellite is to monitor and analyze my country's agricultural and forestry resources. Because of the high resolution of this kind of satellite, which can reach 0.5-1 meters, it is often used in land surveying and mapping, urban construction, and transportation planning.

According to the plan, Changguang Satellite plans to launch a total of 138 Jilin satellites by 2030. By then, the Jilin-1 constellation will be able to detect any point on the earth every ten minutes, even if it is flying extremely fast. The fifth-generation sonic aircraft cannot escape the "golden eyes" of the "Jilin-1" satellite. In response to this extremely powerful detection capability, some netizens claimed that the "Jilin No. 1" had opened a "sky eye."

How strong is the "Jilin No. 1" with a "God Perspective"?
It is understood that this is not the first time that "Jilin One" has discovered a military target. Earlier, the "Jilin-1" satellite broadcast live broadcast of the entire process of the US aircraft carrier's arrival in the port, and also "live broadcast" the entire process of the US military P-8A maritime patrol plane taking off at the airport. Because this kind of satellite can continuously shoot video images with an accuracy of less than 1 meter, the "Jilin No. 1" undoubtedly opens up a "God's perspective" for enemy targets, and can monitor their every move during a certain period of time.

However, because the current number of "Jilin-1" satellites is relatively small, and the time to "revisit" the target is relatively long, it is impossible to monitor the target's whereabouts around the clock, which leaves time for the enemy target to escape. However, when the number of satellites increases to 138, this problem will be completely resolved.

All in all, the "Jilin Satellite" detected a suspected US F-22 aircraft, which is of great significance for future research on anti-stealth fighter equipment. With the development of science and technology, the future is likely to break the US military "stealth myth", so that the US military F-22 and F-35 have nowhere to hide, let us wait and see.
Stop pasting articles from that site, the stuffs posted on the site are highly dubious and not credible. SDF is strict when it comes to information integrity.
 

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