Who has ever seen a LOX/Kerosene liquid 🚀 engine with a blue plume 💎💎💎💎?
ฝัง
- เผยแพร่เมื่อ 13 เม.ย. 2024
- Not only does it look spectacular, but it also serves as undeniable proof of the 99%+ combustion efficiency achieved in this test.
Enjoy this 3-minute, 20-second test of E-2, a mostly 3D-printed 22k lbf (10 tf) ORSC LOX/Kerosene liquid rocket engine. Nominal pressure: 100 bar; mixture ratio: 2.7. Recorded Friday April 12, 2024 at NASA Stennis Space Center. This test also secured the duration record for the test stand.
E-2 is now available for sale to launch companies. - วิทยาศาสตร์และเทคโนโลยี
Those mach-diamonds though!🤩
99% combustion efficiency! Sick work guys.
The ending is epic.
I used to heat by kerosene, those extremely dangerous ones you can't find any more (survived!), and mine fell over before I had a chance to fill it. I didn't see any damage, so I filled it (no leaks) and lit up at full rich and moved gently to lean like the instructions say... but it was damaged, and I could push the mixture door open further than design. It made a rocket noise and it burned blue-purple just like we see here. Burn it lean enough, and kerosene burns blue. The whole idea behind a rocket engine burning fuel-rich is that you get more mass to toss overboard as inert material. Somehow, a little rich gave more thrust. I still don't understand how. This one, however, looks to challenge that. It's one to watch. 3D printing has really grown up.
The rich mixture is used because it lowers the combustion temperatures, making it easier for the engine's components to survive. The specific impulse (efficiency) is not reduced too much because the excess kerosene decomposes to low molecular weight substances, because they have low molecular mass they are more easily accelerated in the nozzle compared to water and CO2. This helps offset the reduced performance from lower combustion temperatures.
Fuel rich doesn't provide more thrust as that's unburnt fuel not being used. Its just simpler to run fuel rich as it allows the turbo pump to run at "cooler" temperatures and not be destroyed by the high temp oxygen rich environment. High specific impulse engines don't run fuel rich because that's wasted energy
Blue still indicates incomplete combustion. It's 432 nm emission from CH radicals. It's always there, though it can be obscured by other visible emissions from carbon particulates. As long as temperatures are high enough to cause dissociation, adding fuel will improve the specific impulse.
Beautiful!! 😍😍
Can’t wait to see this fly!
This is AMAZING!!!! I am absolutely loving ever second of this, mesmerizing!
Seriously impressive.
Love it ❤👏🏼👏🏼
Hay guys, I have a bit of a problem with hornets in my back yard. Can I borrow that thing real quick?
Beautiful! Do you also sell a vacuum optimized variant?
NICE !! Got any high-speed footage with exposure set to see inside the chamber? Outer edge of the flame nearest the engine appears to change colour later in the run - mixture changing, or parts-rich cycle?
Amazing mach diamonds!
Woah. I had no idea what you were talking about until I saw the diamond shapes in the flames. Care to explain how that works??
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Very pretty engine. do you have any customers lined up for it yet? Not looking for names, just want a yes or no. because i wanna see this thing fly, ideally in an engine cluster, that'd be sick. but even just solo would be rad
At 10klb thrust, it's a bit small for a launch vehicle even if clustered. It's an impressive technology demonstrator though!
fair enough
Is it blue because it's Oxidizer-rich, or just because of the +99% combustion efficiency? Amazing work!
Beautiful! It is worth noting that the old school kerosene camping stoves (the famous "Primus") do typically produce blue flame. So why is it so rare to see the blue flame from the rocket engines?
Because inside of an engine, it is more difficult to achieve a combustion efficiency this high.
@@vovochen exactly. High efficiency usually means high-temperature, so it means you have your work cut out for you as a rocket engineer if you want to prevent the engine melting itself from the heatflow.
@@gsmontag The temperature inside of a thrust chamber of a kerosene and liquid oxygen rocket engine is typically in the neighborhood of 3500K, which is easily two-three times as high as the flame temperature of a camping stove.
@@cogoidFalcon 9 uses kerolox but the exhaust is more orange.
@@fallinginthed33p Half of the Soviet engines are kerolox, from the venerable Rd-107 used in Soyuz type rockets, to the highly efficient staged combustion Rd-170 and its derivatives. All of them leave a huge yellow trail, presumably from unburned kerosene.
Rocket lab's Rutherford is supposed to be reasonably efficient, but its exhaust is also yellow.
I looked at the available literature, and it seems that Launcher's E-2 has a unique regenerative cooling system, which uses both liquid oxygen and kerosene for cooling the liner of the combustion chamber. Perhaps Launcher has indeed achieved such efficiency from regenerative cooling, that they do not require kerosene film cooling which is what creates most of the unburned kerosene in other engines. But that's just a guess. It would have been nice to know the real answer.
how much % is printed ?
This is the most clear plume of a kerolox engine, the ratio between the oxidizer and fuel may be very fine, and this shouldn't make the nozzle full of soot
I amazed by this new engine’s combustion efficiency.
Given that LOX/Kerosene rocket engine exhaust is usually brilliant white is because the of all the unburned carbon in the exhaust.
My question is, how are they burning all that carbon in the engine when others haven’t been able to until now!
Very Star Trek kind of leap in abilities.
The peroxide-kerosene engines used on the UK Black Arrow launcher back in the 1960s burned the kerosene in the hot oxygen/steam mixture after a catalyst pack, and had a clear blue exhaust as well thanks to the excellent atomization of the kerosene and thorough combustion. Kudos to the Launcher team for acheiving very high combustion efficiency by the similar technique of burning the kerosene in the hot gas from the Ox-Rich Staged-Combustion turbine exhaust!
Blue indicates CH radicals so the combustion isn't complete. CH has a lower molecular mass than CO or CO2 so the incomplete combustion can still be more efficient in terms of specific impulse
What is the gas ⛽ consumption? 😫
Mach diamond
How was this video processed? It feels like the saturation and contrast have been cranked up.
It may have some HDR applied, since the light from the throat is very bright and without HDR would make the inside of the nozzle be overexposed.
Look at the shadow angle from the Sun. This is Rec709 but the Sun is low in the sky, almost square on to the flat sides of the beams, and minus-blue thanks to the extra atmosphere it's coming through.
Complete, fart and all.