SchmidtMotorWorks wrote: ↑Thu May 18, 2023 10:11 pm
Here is the peak of the floor arch raised.
Unfortunately it made things worse, at least the way it is now, there are sill possibilities to lay the short side back if that is interesting to see.
Here is how I raised the arch, could have done it lot's of different shapes, maybe less maybe move the peak?
There is always an element of surprise in this stuff.
One of the personal challenges in this work it to stay in a seeker mindset, forget that you "know" anything.
compare 1-2 raise floor.png
Here is port 2 again
Intake Port 2 Long Section Velocity.png
Compared to port 3 (raised arch)
Intake Port 3 Long Section Velocity.png
Here is vorticity in port 2 again
Intake Port 2 Long Section Vorticity.png
Here is where trouble shows up in vorticity past the peak.
Intake Port 3 Long Section Vorticity.png
Here is piston top pressure from port 2
Intake Port 2 Piston Top Pressure.png
Here is piston port pressure from port 3, the same piston velocity pulls more vacuum
Intake Port 3 Piston Top Pressure.png
Here is velocity with arrows of a slice, this image shows the difference between how air follows a piston than it would flowing into a bottomless cylinder. Since the piston is much larger than the curtain area, the air is traveling much faster than the piston as it leaves the curtain.
It decelerates very fast and then turns very fast to follow the piston top.
Notice how biased the recirculation is on the valve face.
Section Following Piston.png