How much you enlarge depends on how far you are going with the motor “force-feeding”!
in the future.
I am just talking of a “reservation” of room = process volume in the gasifier.
The further you go, the more urgent an intercooler becomes.
But for the moment, it is a question of area = flow passage enlargement, not straight diameter increasing!
Formula for area:
Pii x d2
3,14159 x d2
Any nozzle area increase is of course 16-fold; to begin with, increase only the horizontal holes.
With the current gasifier, the diameter enlargement for the nozzle-tips-circle is hardly doable, if not turning them outward from the center and adding a U-turn peace and the original tip screwed in, turned inward the center!
At the same time, by having the U-peace not bent straight upward, but say 45* tilted, you could have a bit less height increase but the inward aiming leg would be out of the way for the upward blowing beam.
This is easier for temporary experimenting, than rebuilding everything, without knowing how the new measures work.
Getting U-turns applied may be impossible because of crowding…
Then Kristijan’s suggestion to just raise the current 90*:s with an extra connection.
This is delicate…
The area formula for the restriction is “up there”.
This is a bit unhappy, as this gasifier is obviously intended to be built once-only, and not to be a “testbench”.