Chinese Engine Development

Jianguo

Jianguo

Junior Member
Registered Member
dengyeye said:
I think it will be a good idea to send a message to Russia that they have two choices; either sell China whatever engine technology it wants, or don't and China will catch up anyway through espionage/poaching/innovation/etc. Second choice might take longer, but end result is the same, which is that China will catch up to and surpass Russian engines. Russia can choose to cash out and speed up this process or not and watch its people starve. Not a hard decision to make I think.
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Are you being serious? This is the kind behavior that American policy makers do all the time. This is also why they constantly kick themselves in the balls and get face palmed when their "allies" have another option. China is known for their win-win approach to policy. It's why the international community trusts China's word. I'm talking about the real international community, not the American controlled one composed of American vassals. Russia and China need each other. Why aggravate them for short term gain? Besides this, look at Africa? Does China need Africa as badly as Russia? They don't and yet China is famous for providing them favorable trade, finance and diplomat policies.

The world isn't all Machiavellian lie-cheat-steal. That is the history of the Anglo-Americans and to a lesser extent of the West Europeans. There is a moral imperative that dictates what all Human Beings call "fair". This is the difference between China and many of the "developed" countries of today who base their national policies on winner take all thinking. This is also the main reason why the majority of the world's countries and population support China and Russia today despite the overwhelming global propaganda against them.
 
broadsword

broadsword

Brigadier
Jianguo said:
Are you being serious? This is the kind behavior that American policy makers do all the time. This is also why they constantly kick themselves in the balls and get face palmed when their "allies" have another option. China is known for their win-win approach to policy. It's why the international community trusts China's word. I'm talking about the real international community, not the American controlled one composed of American vassals. Russia and China need each other. Why aggravate them for short term gain? Besides this, look at Africa? Does China need Africa as badly as Russia? They don't and yet China is famous for providing them favorable trade, finance and diplomat policies.

The world isn't all Machiavellian lie-cheat-steal. That is the history of the Anglo-Americans and to a lesser extent of the West Europeans. There is a moral imperative that dictates what all Human Beings call "fair". This is the difference between China and many of the "developed" countries of today who base their national policies on winner take all thinking. This is also the main reason why the majority of the world's countries and population support China and Russia today despite the overwhelming global propaganda against them.
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Your message would have been lost on a few who feel that China has the right to do what America and her ilk did to the other part of the world. Surreal, but true.
 
Jianguo

Jianguo

Junior Member
Registered Member
latenlazy said:
You mean a blisk?
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Yes, an integrated blade/rotor assembly. They were bench testing a CMC blisk at X'ian University before they flight tested a CMC blisk on January 1, 2022 in Zhuzhou, Hunan. The flight test was a proof of concept so the real stress testing was all done in the lab.

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Design, fabrication and testing of ceramic-matrix composite turbine blisk​

  • Abstract
  • Turbine rotor is the key component of gas turbine engines. Design, fabrication, and experimental verification of SiC/SiC turbine blisk were investigated. The Spider Web Structure (SWS) SiC preform was used as the reinforcement in turbine blisk. The BN interphase and SiC matrix were deposited on the surface of the SWS SiC fiber preform, respectively. The SiC/SiC turbine blisk was machined by "on-line processing" to form a turbine bisk that meets the design requirements. The environmental barrier coatings (EBCs) were prepared on the surface of SiC/SiC turbine blisk using the atmospheric plasma spraying (APS) method. The CT scan was conducted to characterize the internal defects in SiC/SiC turbine blisk. The mechanical performance evaluation, over rotation test and engine bench test were performed, respectively. The maximum failure strength approached 300 MPa. During the over rotation test, when the rotating speed reached n = 104166 r/min, the blade in the turbine blisk broke; and when the rotating speed reached n = 108072 r/min, the disk in the turbine blisk broke. During the engine bench test, low cyclic fatigue of N = 994 cyclic with maximum speed nmax = 60000 r/min and N = 100 cyclic with maximum speed nmax = 70000 r/min were completed. On January 1, 2022, the SiC/SiC turbine blisk successfully completed the first flight test in Zhuzhou, which is also the first flight test of the domestic SiC/SiC rotor assembly platform and verified the feasibility of SiC/SiC turbine rotor application in gas turbine engines.
 
L

latenlazy

Brigadier
Jianguo said:
Yes, an integrated blade/rotor assembly. They were bench testing a CMC blisk at X'ian University before they flight tested a CMC blisk on January 1, 2022 in Zhuzhou, Hunan. The flight test was a proof of concept so the real stress testing was all done in the lab.

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Design, fabrication and testing of ceramic-matrix composite turbine blisk​

  • Abstract
  • Turbine rotor is the key component of gas turbine engines. Design, fabrication, and experimental verification of SiC/SiC turbine blisk were investigated. The Spider Web Structure (SWS) SiC preform was used as the reinforcement in turbine blisk. The BN interphase and SiC matrix were deposited on the surface of the SWS SiC fiber preform, respectively. The SiC/SiC turbine blisk was machined by "on-line processing" to form a turbine bisk that meets the design requirements. The environmental barrier coatings (EBCs) were prepared on the surface of SiC/SiC turbine blisk using the atmospheric plasma spraying (APS) method. The CT scan was conducted to characterize the internal defects in SiC/SiC turbine blisk. The mechanical performance evaluation, over rotation test and engine bench test were performed, respectively. The maximum failure strength approached 300 MPa. During the over rotation test, when the rotating speed reached n = 104166 r/min, the blade in the turbine blisk broke; and when the rotating speed reached n = 108072 r/min, the disk in the turbine blisk broke. During the engine bench test, low cyclic fatigue of N = 994 cyclic with maximum speed nmax = 60000 r/min and N = 100 cyclic with maximum speed nmax = 70000 r/min were completed. On January 1, 2022, the SiC/SiC turbine blisk successfully completed the first flight test in Zhuzhou, which is also the first flight test of the domestic SiC/SiC rotor assembly platform and verified the feasibility of SiC/SiC turbine rotor application in gas turbine engines.
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If it’s a blisk that probably means it was used in the HPC section, and given the primary benefits of CMCs being high strength at high temperature, probably at the very last HPC stage of whatever engine it was used in. That fact that they flew an engine with the blisk is extremely interesting because it begs the question of which engine.
 
Jianguo

Jianguo

Junior Member
Registered Member
latenlazy said:
If it’s a blisk that probably means it was used in the HPC section, and given the primary benefits of CMCs being high strength at high temperature, probably at the very last HPC stage of whatever engine it was used in. That fact that they flew an engine with the blisk is extremely interesting because it begs the question of which engine.
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It really shows how far China has come when they can successfully develop leading edge materials for the toughest part of an engine when they were literally like ass-backwards "compared" to the leaders US/UK, Russia, France and even Japan less than 15 years ago. Something interesting to note is the photos they took of the supposed test aircraft.

1661752228362.png

With preliminary ground testing completed, I was expecting something that would at least demonstrate the "initial" bare minimum capability of TWR of 7+ and in flight turbine temperatures of a very minimum of 1400° Fahrenheit. Instead, it looks like they fitted their CMC engine platform onto what looks like an oversized RC model? I can't even see the air intakes. It's almost like they posted some fake pictures to perhaps mislead and troll American analysts.
 
L

latenlazy

Brigadier
Jianguo said:
It really shows how far China has come when they can successfully develop leading edge materials for the toughest part of an engine when they were literally like ass-backwards "compared" to the leaders US/UK, Russia, France and even Japan less than 15 years ago. Something interesting to note is the photos they took of the supposed test aircraft.

View attachment 96352

With preliminary ground testing completed, I was expecting something that would at least demonstrate the "initial" bare minimum capability of TWR of 7+ and in flight turbine temperatures of a very minimum of 1400° Fahrenheit. Instead, it looks like they fitted their CMC engine platform onto what looks like an oversized RC model? I can't even see the air intakes, it's almost like they posted some fake pictures to perhaps mislead and troll American analysts.
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How do you know this picture is associated with the blisk.
 
L

latenlazy

Brigadier
Jianguo said:
With preliminary ground testing completed, I was expecting something that would at least demonstrate the "initial" bare minimum capability of TWR of 7+ and in flight turbine temperatures of a very minimum of 1400° Fahrenheit. Instead, it looks like they fitted their CMC engine platform onto what looks like an oversized RC model? I can't even see the air intakes. It's almost like they posted some fake pictures to perhaps mislead and troll American analysts.
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It looks like the CMC that flew was on a small scale demonstrator, which means there's probably still a ways to go before we see it adopted in an actual full sized production engine.
 
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