At risk of restarting a sleeping conversation, I still would not
recommend pressurizing 500psi LOX tanks on a pressure fed stand with
nitrogen on your first test stand.
If you do pursue the current PID, it is standard to put double
checkvalves in situations where propellant could cross, such as the
pressurant lines upstream of the tanks.
The two regulators in a row will cause interesting pressure coupling,
and also mean that both regulators will be about twice as large as
would be necessary if each regulator fed one tank. The first is twice
as large because it's feeding both tanks, the second because it is
operating at such a low inlet pressure compared to outlet pressure.
Have you found solenoid valves that can flow at the necessary rate for
the main valves? They would be big solenoid valves.
Is there an ignition system?
Ben
On Mon, Sep 12, 2016 at 6:57 PM, Dillon Wessing <dillonwessing@xxxxxxxxx> wrote:
Hi all. I am the lead of the USC Liquid Propulsion Lab. We’re developing a
LOX / IPA engine and wanted some input/advice on our ground testing P&ID.
Just some general specs for the engine. 10 kN of thrust. Total mass flow 4.2
kg/s (fuel: 1.91 kg/s, ox: 2.29 kg/s). Chamber pressure 350 psi. Pressure
going into the injector 437. 5 psi.
We are having channels milled into our combustion chamber for regen cooling
with the IPA and will have a separate reg for the ox since the IPA will have
higher pressure drops. Please comment on the validity of this design and any
concerns that we should keep in mind.
Best,
Dillon Wessing
