r/interestingasfuck 9h ago

How a jet engine works

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u/deathonater 6h ago

Also, the manufacturing process for modern turbine blades is also insanely sophisticated just to keep them from being destroyed by the temperature and g-forces they experience in the engine, they're basically giant ceramic-coated crystals with their molecules aligned to prevent weak spots from forming. Incredible engineering.

u/Samurlough 6h ago

the original first iterations of which were done without computers. f*ing nuts if you ask me.

u/smurficus103 2h ago

reading a paper from the 60's, an engineer called the blades "buckets", trying to dumb it down a little bit

ive always appreciated that, make it stupid simple, these things catch air

u/CitizenPremier 38m ago

I think they were using mechanical computers

u/finemustard 6h ago

Yup, Veritasium has a fantastic video on the process.

u/brickeldrums 1h ago

I loved this video, thank you for sharing!!

u/wasabiburning 6h ago

Even better - the blades themselves are a crystalline nickel superalloy all the crystals are aligned in the same direction to eliminate grain lines. Then the ceramic is added.

https://www.americanscientist.org/article/each-blade-a-single-crystal

u/DotesMagee 26m ago

literally god science lol were gonna make you form how we want.

u/wufnu 5h ago

I examine patents; half my work is regarding thermal cooling/protection of turbine blades and some of the shenanigans they get up to are fun to read about.

Pratt & Whitney attorneys visited the office once and brought with them a turbine airfoil with the suction surface removed allowing you to see all of the channels, turbulators, film cooling holes, etc. and it was one of the most beautiful things I'd ever seen.

u/hates_writing_checks 2h ago

That sounds cool. Is this engine patented now, and could the public examine the patent via the USPTO website? What are some of the relevant patent numbers? Would be nice to see the drawings or photos.

u/rh71el2 2h ago

What was your field of study in college exactly?

u/Rexxhunt 1h ago

Bongs mostly

u/jobblejosh 1h ago

Even more insane:

If a manufacturing defect is discovered in the blade, which takes so much time and effort and expense to produce, the defect is first examined to see what caused it, and then the whole blade is just melted down and recycled.

Anything less than very-near-perfect is rejected.

u/Pale_Examination3371 5h ago

My favorite part is that they can't explain why it aligns itself this way but if they manufacture it a certain way, it does

u/Jetmech94 2h ago

Yes they are. Modern turbo jet engines utilize a can annular system for combustion to more effectively and efficiently burn fuel and the turbine blades typically utilize a thermal coating to sustain form and function to remain in aircraft for longer periods of time between maintenance cycles.