Would it be feasible in any rocket engine (liquid or solid) intended for flight above the atmosphere to add one of the following elements: barium, lithium, sodium, copper, or calcium to create different colors in the exhaust plume, or would those elements render all engines not flight worthy? Is there any rhyme or reason to the color of the exhaust plume from various rockets? In particular, the SSME (H2 - O2) has a virtually invisible exhaust while the RS-68 (also H2 - O2) has a very bright orange exhaust. Phenomena of Rocket Exhaust Plumes ed from shells. Mach mathematically proved that the shell when near the speed of sound created Figure 7: Engine test with Mach Diamonds Finally, on to the discussion of Shock Dia.
In general, light emission from rocket exhaust plumes is complicated; they aren't simple uniform flames. They have shock waves bouncing back and forth inside, and various other complexities. Also, since rockets generally perform best if run a bit fuel-rich, there is actual combustion happening when the plume hits atmosphere, to complicate.
Rocket Exhaust Color If you look at the exhaust of the Saturn V rocket (in particular, just because it's famous), you'll see that in some pictures, you can see a section below the engine that is nearly pitch black before the expected bright orange flame. It can be hard to find a good image of it, so here's a link to a video at the time that. (Rocket) Plume RGB Quick Guide Why is the Plume RGB Important? The improved spatial, temporal and spectral attributes of the ABI allow for monitoring plumes associated with rockets and hotspots.
PC and mobile game about building rocketsHeading1 What is custom exhaust plumes? Exhaust colors are how what the color will come out when the rocket engine is activated. Different fuel types affect the color of the exhaust. For example Methalox turns it blue, Kerolox turns it yellow/orange, and Hydrolox turns it white.
---------- However, you could solve and get rid of it by. Rocket engine plume colorHello, I know that the color of the exit plume of a rocket engine is determined in part by the type of fuel used but during a Soyuz launch the exhaust plume from the first stage is yellow. Fireworks formula are interesting to look at and understand, but realize they are ALL made to burn at atmospheric pressure.
Rocket motors run at MUCH higher pressures and coloring your exhaust flame is more challenging. u/SuperStrifeM gives some good tips. Be cautious with Barium compounds.