The Jet Engine thread

[Vitormouraa]

Hey guys!

 

So it's been a long time that I've been wanting to create a thread that is all about gas turbine engines, jet engines in general. I absolutely love the topic and I'm sure there are people here who love this topic too!

 

So I'm finally creating a thread all about turbine engines. I've been thinking about this for months, and I still don't know what to post here. Not sure if I should post a video, a question, quote or even photos...

 

So I decided to post a link to a channel that inspired me to study the subject, which is, of course, the AgentJayZ! One of the greatest channels on YT IMHO. :smartass:

 

https://www.youtube.com/user/AgentJayZ/videos A channel that is all about jet engines!

 

So what I want to discuss in this thread: Everything about jet engines, being turbofan, turbojet, turboshaft, ramjet, rockets, anything related to jet engines.

 

Please, if you have any question, picture, article, video to share, feel free to post them here!

 

Here are two pictures of the SR-71 Blackbird (one of my fav jets!) taking off (1st pic) with afterburner on, and as you can see the Shock diamonds in the afterburner flame, which are oblique shockwaves caused by the supersonic gases and the difference in pressure (abrupt pressure changes) between the exhaust gas flow and the atmospheric pressure. At low altitudes, jet engines nozzles are generally over-expanded, which means the atmospheric pressure is higher than the exit flow of the exhaust. This increase in pressure ignites basically anything in the engine's exhaust! Temperature and pressure in the core of the shockwave are extremely high!

 

 

 

 

I could talk about the SR-71 all day long... but anyway, feel free to post anything related to jet engines, I'm looking forward to seeing them!

Edited February 14, 2018 by Vitormouraa

[Vitormouraa]

Amazing photo of the Falcon Heavy during lift off.

 

[Texac]

Great thread idea!

[Vitormouraa]

Thanks for contributing Texac!

 

Edited February 11, 2018 by Vitormouraa

[cichlidfan]

 

:)

[cthulhu68]

:thumbsup:

[cichlidfan]

Thanks for contributing Texac!

 

*image*

 

I think that is the most amazing image that I have seen. My youth was spent following everything space related and I never imagined seeing something like that.

[Vitormouraa]

Indeed. I find this image brilliant, amazing. For a really long time, rockets used to be thrown away in the space and now, we can make them land vertically, which is mind-blowing, at least to me. Not sure if I'm exaggerating but I could say that two rockets, landing information, vertically, must be the most beautiful thing of this century, yet! Technologically saying. :)

[Vitormouraa]

The Mighty GE90 of the 777, "side by side" with the 737! 128 (fan - while the nacelle is 134) inches of diameter... that's a lot! :D

 

 

-

 

Edited February 11, 2018 by Vitormouraa

[cichlidfan]

Indeed. I find this image brilliant, amazing. For a really long time, rockets used to be thrown away in the space and now, we can make them land vertically, which is mind-blowing, at least to me. Not sure if I'm exaggerating but I could say that two rockets, landing information, vertically, must be the most beautiful thing of this century, yet! Technologically saying. :)

 

^^^QFT :thumbup:

[NRG-Vampire]

...space related and I never imagined seeing something like that.

 

that's an F-15 related pic: :smilewink: of a Pratt & Whitney F100 engine

 

Edited February 11, 2018 by NRG-Vampire

[cichlidfan]

that's an F-15 related pic: :smilewink: of a Pratt & Whitney F100 engine

 

Check my quote. I wasn't speaking about that image.

[gabgio]

that's an F-15 related pic: :smilewink: of a Pratt & Whitney F100 engine

 

 

 

 

 

 

Nice! My new desktop pic :)

[Vitormouraa]

I think we can see some thermocouples right there! Beautiful piece of engineering.

[Joe Kurr]

Got some afterburner pics for you :)

 

This is what an afterburner flame should look like (Belgian F-16AM taking off from Volkel Airbase during an exercise)

 

This is what it definately should NOT look like (it failed a few minutes after I took this picture)

 

"Burp" (French Mirage-2000D taking off from Leeuwarden airbase during an exercise)

[Vitormouraa]

Nice photos! Indeed, the F-16 has a nice afterburner with many shock diamonds in it. It's quite clear how that pilot had some sort of incomplete combustion during the take off.

 

MiG-31:

 

[Joe Kurr]

Greek F-16 scorching the runway at Gilze-Rijen Airbase on takeoff, showing the power of an afterburner

 

The F-16 on the second picture in my other post had a leak in the fuel line to the afterburner.

Sometimes the fuel just oozed out, like in this picture

[Texac]

rattle.. rattle.. rattle

 

[Vitormouraa]

Hehe! I personally love the clicking sound of the engine (especially the compressor rotor) when shutting down the engine. Tho it's completely normal, it may sound strange to some people :D

 

The L-39 in DCS has this sound, and it's very cool.

 

Oh, let's not forget the exciters of the ignition system. :) Tac tac tac

[Vitormouraa]

Touching the turkey feathers of the F414 engine in afterburner!

 

 

The beauty of engine engineering. The turkey feathers don't get hot at all! you can touch them without any problem, even if the engine is in afterburner. The reason is that there is air flowing between the engine and the turkey feathers themselves. They are completely isolated from the jet pipe, composed of titanium and steel. No heat is transferred to the turkey feathers in order to prevent an increase in IR signatures.

[Vitormouraa]

This is what happens when you put too much fuel in the combustion chamber! (AgentJayZ footage)

 

Insane flameout, there is even unburnt fuel coming out of the exhaust...

 

https://i.giphy.com/l4pT90sWz0I3lQVZ6.mp4

[Vitormouraa]

Some photos of the TF34-GE-400, it's tiny without the nacelle right? :D

 

[mvsgas]

No heat is transferred to the turkey feathers in order to prevent an increase in IR signatures.

Less about the IR signature, more about preventing the AB to burn through the exhaust liner.

[SinusoidDelta]

Vitormoura directed me here from another thread :)

 

Here’s a picture I took of the J58 at the USAF museum

 

And the Junkers Jumo 003:

Edited February 22, 2018 by SinusoidDelta

[SinusoidDelta]

And one more of the JT15D-5: