Well I can do the engine/compressor if I need too.
the flow rate should be roughly 30 pounds per minute.
I guess I'll just start with 1/4" flare fittings 4 of them and tap them
for orifices so I can just drill them out as we go.
I'll start off with my shop compressor and move up to my torch regulator
for higher pressure.
I need to set up the dyno for testing anyway and I can start off that at
lower output.
I'll get the best angle freehand by holding the nozzle in hand and
trying it on the turbine.
I'd like to build the balancer I've got a spreadsheet that does all the
calcs including where to remove weight if your still interested in that?
It should be all there and you could use it to write a program.
The kinetic dyno software is out there I guess I need to find the best
one that can be had open source.
I think I'll just get some magnet wire from an old speaker and wind it
on a toothpick and see if I can magnetize the turbine nut and get a
signal with that for RPM.
-------- Original Message --------
Subject: [AR] Re: Turbopump prime mover
From: Ed LeBouthillier <codemonky@xxxxxxxxxxxxx>
Date: Wed, December 02, 2015 10:21 am
To: arocket@xxxxxxxxxxxxx, arocket@xxxxxxxxxxxxx
Monroe L. King Jr. said
The pressure is what I am trying to calculate.
Number of nozzles and orifice size.
I can go as high as 1000psi
I've got a V8 motor I can put light springs on the intakes grind down
the exhaust lobes and pump out the spark plug holes if I needed that
much flow.
If you use the V8 motor as the compressor, then you should easily
be able to figure out the mass flow rate and pressure for a given
input horsepower. Obviously, the displacement is the volume of the
gas. Multiply that by the RPMs and you'll get a volume per unit time.
The volume will be the same no matter what, but the pressure will
vary with the input torque available.
But I'm pretty sure we can do it with a bottle of dry nitrogen.
It might be harder with the bottle of nitrogen because getting the kinds of
flow rates needed with controlled pressures can be difficult. Most regulators
aren't made to control those kinds of flow rates.