Chengdu next gen combat aircraft (?J-36) thread

kurutoga

Junior Member
Registered Member
I thought you guys worried too much about cooling.

When they say cooling consumes power, I assumed (which I am not sure) they were talking about something like an air conditioner. Either through liquid or some special metal material, to transfer heat from the electronics to some other place, either the surface or the air intake/bypass. Problem in old gen solutions such as F-35 was they did not reserve enough space and electricity to install this type of cooling system, not that the cooling engineering problem can't be solved.

A changing requirement set is always the worst thing for such a solution.

Chengdu would certainly design=>simulate=>modify=>implement=>test until everything works. Then, in trial flights they will fine tune the jet. New materials/process/knowledge gained through EV supply chain can at least help, but on a fighter jet the designer had to work with more constraints to meet much higher demands under worse conditions.

Compare to F-35 or J-20, the newer gen jet designers will have a better idea of the future changes (larger engines, bigger radar, laser etc) thus they can plan ahead. Let the designers do their job
 
Last edited:

supercat

Major
A configuration for S-duct inlet - notice it's a side-by-side twin seater in the picture.
4rQPptY.jpg
 

AndrewJ

New Member
Registered Member
我已经有一段时间没有阅读 SDF 了,所以我不知道这是否是公众知识。 BUAA 的链接对我来说非常慢。有一个不同的下载链接(如果您居住在中国境外)可以更快地访问:
Please, Log in or Register to view URLs content!
Key design details from Wang Haifeng's paper:
  1. By simultaneously adopting adaptive variable cycle engines and variable geometry air intake designs, the aircraft can achieve much fewer spill drag under different operating conditions at various flight stages, including takeoff, subsonic cruise, transonic, and supersonic cruise. This allows much better high-speed performance, reduces fuel consumption, and extends range.
  2. Significant rear radar and infrared stealth capabilities can be achieved through integrated intake/engine fan, integrated engine air bleed/cooling, TVC nozzles, integrated afterburner combustion chambers, and S-shaped nozzles. (5th gen has poor rear infrared stealth performance.)
  3. Active infrared suppression measures for end-game countermeasures against infrared-guided missiles are implemented through the injection of cold media on the engine's tailpipe hot surfaces and the use of aerosol jet injection.
  4. Engine design is coordinated with the overall fighter aircraft design during the entire design process, optimizing both thrust and infrared stealth characteristics, with repeated checks at each design phase to ensure infrared stealth targets are met.
  5. A flexible thermal management system to balance thermal peaks and valleys. Duct air has fewer design limitations for heat dissipation systems, allowing for lighter and more compact duct radiators.

His definition about high-performance fighter jets:
  1. More comprehensive flight performance, capable of balancing deep penetration (long-time supersonic cruise) as well as maneuverability at typical combat engagement points.
  2. Enhanced stealth performance, broadening frequency and spatial ranges, including radar and infrared, enabling penetration in high-threat areas.
  3. Larger weapon payload capacity, supporting sustained engagement and fighting against numerically superior enemy forces with fewer resources.
  4. Strong situational awareness and electronic warfare capabilities, allowing for priority evasion of enemy detection and gaining the first-look, first-shot advantage when evasion is not possible.
 

kurutoga

Junior Member
Registered Member
There was a pretty old interview of Chengdu's Yang Wei:
Please, Log in or Register to view URLs content!


He mentioned some core components will be used for the first time in the next gen fighter:
  • Terahertz (THz) radar
  • AI system
  • Adaptive Variable Cycle Engine
  • Wing changing shapes (I guess this means flexible wing material)
Anyone has more details? I don't expect China's ACE engine to be ready yet, for example.

Is the THz radar actually feasible? Or, that was what's inside the large window on the chin? My understanding is THz is basically IR, which does not have a very long range.
 
Last edited:

AndrewJ

New Member
Registered Member
Some pics:
6.png9.png25-26.png19.png32.png34.png
Key design details from Wang Haifeng's paper:
  1. By simultaneously adopting adaptive variable cycle engines and variable geometry air intake designs, the aircraft can achieve much fewer spill drag under different operating conditions at various flight stages, including takeoff, subsonic cruise, transonic, and supersonic cruise. This allows much better high-speed performance, reduces fuel consumption, and extends range.
  2. Significant rear radar and infrared stealth capabilities can be achieved through integrated intake/engine fan, integrated engine air bleed/cooling, TVC nozzles, integrated afterburner combustion chambers, and S-shaped nozzles. (5th gen has poor rear infrared stealth performance.)
  3. Active infrared suppression measures for end-game countermeasures against infrared-guided missiles are implemented through the injection of cold media on the engine's tailpipe hot surfaces and the use of aerosol jet injection.
  4. Engine design is coordinated with the overall fighter aircraft design during the entire design process, optimizing both thrust and infrared stealth characteristics, with repeated checks at each design phase to ensure infrared stealth targets are met.
  5. A flexible thermal management system to balance thermal peaks and valleys. Duct air has fewer design limitations for heat dissipation systems, allowing for lighter and more compact duct radiators.
 

Attachments

  • 25-26.png
    25-26.png
    383.3 KB · Views: 31

AndrewJ

New Member
Registered Member
There was a pretty old interview of Chengdu's Yang Wei:
Please, Log in or Register to view URLs content!


He mentioned some core components will be used for the first time in the next gen fighter:
  • Terahertz (THz) radar
  • AI system
  • Adaptive Variable Cycle Engine
  • Wing changing shapes (I guess this means flexible wing material)
Anyone has more details? I don't expect China's ACE engine to be ready yet, for example.

Is the THz radar actually feasible? Or, that was what's inside the large window on the chin? My understanding is THz is basically IR, which does not have a very long range.
AVCE is coming out in 2~3 years.
J36 may not change wing shape(?), but inlet shape. According to the paper from chief designer. I listed some points above.
 
Top