Timeline for Why are exhaust flames "jumping around" the bases of the Falcon-9 engine nozzles; NROL-76?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 9, 2019 at 3:27 | vote | accept | uhoh | ||
| Nov 2, 2017 at 5:54 | vote | accept | uhoh | ||
| Dec 5, 2018 at 2:13 | |||||
| Jul 21, 2017 at 3:01 | review | First posts | |||
| Jul 21, 2017 at 3:49 | |||||
| Jul 16, 2017 at 16:01 | comment | added | W. Peek | "Are you thinking this is buoyancy, or just low pressure, or flow separation?" I don't want to answer in the affirmative if I don't know the exact reason. I would guess some or all of the above. I would also add possible delayed ignition of combustion bubbles. That's what all the sparks you see near the Space Shuttle engine bells are doing right before lift off. Burning off escaping combustion bubbles. It is interesting to note, you said you see this activity primarily in the 250 to 300 m/s range as this is the trans-sonic range. There could be what in aerodynamics is called critical mach turb | |
| Jul 16, 2017 at 15:34 | comment | added | uhoh | Thanks for the nice answer! For the following: "The jittery-ness you see, is atmospheric drag on the nose cone slowing the overall craft down a little more than the lighter upward moving exhaust gasses. The gasses are actually passing the rocket nozzle in the upward direction." are you thinking that this is buoyancy, or just low pressure, or flow separation? I'm wondering why it happens suddenly in one place, then over a few seconds moves around the base of the rocket. | |
| Jul 16, 2017 at 14:31 | history | answered | W. Peek | CC BY-SA 3.0 |