Chinese Engine Development

Jeff Head

General
Registered Member
So, I will just throw this crazy idea out there... why not..
Ultra, and any others...on each forum we have,an "Ask Anything Thread."

If you have an admittedly crazy thing, idea, or question to "throw out there"...

DO IT ON THE ASK ANYTHING THREAD.

These threads are for news, data, specifications, and discussion of the actual aircraft.

Thanks.

DO NOT RESPOND TO THIS MODERATION
 

by78

General
A very rare photo of the WS-10 undergoing testing with full afterburner:

(1900 x 1231)
20190992166_8f716060ce_o.jpg
 

antiterror13

Brigadier
A very rare photo of the WS-10 undergoing testing with full afterburner:

(1900 x 1231)
20190992166_8f716060ce_o.jpg

Very interesting photo, thanks.
Just wondering whether the colours of the flame are normal, I mean ... I am expecting mostly blue for an obvious reason. But the flame colours in the photo mostly pink/red
 

SpicySichuan

Senior Member
Registered Member
A very rare photo of the WS-10 undergoing testing with full afterburner:

(1900 x 1231)
20190992166_8f716060ce_o.jpg
This is a very simple question. Why do some engine spit out yellow fire, and why do some (like AL-31F series and later versions of WS-10A Taihang) spit out blue ones? Also, I recall that earlier Taihangs' afterburner spit out yellow fire, but recently newer ones seem to be "Russified" and spit out blue ones. Finally, I both the F-15 and F-16's F110 engines (and Euro Typhoons) spit out yellow fire. It seems to me that only Russian engines spit out blue afterburner.
 

SamuraiBlue

Captain
The color of flame is based on additives within the fuel. It's the same principle as coloring of firework in which the metal ion is expressed.
One other possibility is the flame is touching part of the engine in which that part is evaporating within the flame but in this case the color would be isolated as a stream within a stream.
 

thunderchief

Senior Member
This is a very simple question. Why do some engine spit out yellow fire, and why do some (like AL-31F series and later versions of WS-10A Taihang) spit out blue ones? Also, I recall that earlier Taihangs' afterburner spit out yellow fire, but recently newer ones seem to be "Russified" and spit out blue ones. Finally, I both the F-15 and F-16's F110 engines (and Euro Typhoons) spit out yellow fire. It seems to me that only Russian engines spit out blue afterburner.

Temperature of the flame. Higher temperature means higher frequency i.e. shift to the blue . But notice that inside flame there are different gasses burning at different temperatures, so actual color is a mixture of all those temperatures . For example, engines of F-15 emit yellow flame that becomes almost white in full afterburner mode . Flankers on the other hand require even more powerful engines, therefore higher temperatures and shift to blue .
 
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