Rocket Fuel

In article ,
says...

On 2019-12-22 12:21, Jeff Findley wrote:

This makes no sense. Where does the excess fuel get oxidizer to combust
in the bell? There is no source for this.

I asked in this group not that long ago why the fancy rocket engines
can't burn kerosene in a nice clean blue flame since even my camping
stove is able to do that.

Yes.

I was told that they purposefully have fuel rich environment so there is
combustion that happens in the bell to to expand that fuel, thus
maintaining a more optimal pressure in the bell, and this fuel, in
burning/expanding would also get accelerated downward after pushing up
on the engine bell.

You remember wrong. I can't imagine anyone telling you that because
it's wrong.

So not only accelerated by the "clean" combustion going out the
combustion chamber exhaust, but gets second acceleration as it burns in
the engine bell.

There might be some combustion in the bell, but that's not why you want
fuel rich combustion. That's wanted due to the lighter molecules and
disassociated atoms (i.e. hydrogen molecules and atoms).

Where does it gets its oxygen? That was not discussed. It was pointed
that this was one big reason for different engine bells in vacuum
engines vs sea level.

Nope. Again, I can't imagine anyone explaining it this way because it's
simply wrong.

Jeff
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