Oxidizer
tank pressure test
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Illustration
9 - Full tank view |
The idea behind this
test was to bring the tank to full pressure, maintain the pressure
for a few minutes to see if it would hold and to learn the venting
process when filling the tank with nitrous oxide.
The tank is all made
from 1.5" (38.1 mm) by 18" (0.4572 m) Sch 40 PVC except
for the injector and venting valve. The pressure gauge is being
used only for static tests as a means to evaluate the data
PRESSURE
AND VENTING TEST |
Illustration
10 |
The tank was filled
two times to a pressure of 550 psi or 37.92 bar at an ambient
temperature of 59 fahrenheit / 15 celsius, on both occasions
it was left standing for two minutes before releasing the gas
and in both cases there was no sign of failure. |
Illustration
11 |
I had read about
the white plumb of liquid NOX indicating that the tank is full,
and how it happens a few moments after the tank reaches peek
pressure. Here is a video that shows just that. |
Illustration
12 |
This is the moment
when the pyro charge ignites by the injector releasing the oxidizer.
This test can provided information on injector flow rate and
duration of operation. See video for more details. |
| blowout.mov
(740 KB) |
blowout.mpg
(180 KB) |
TANK
CALCULATIONS
Diameter
= 4 cm
height = 45.5 cm
Volume = 571 cm^3 = 0.571 L
Density
of NOX = 770 Kg/M^3 = 0.77 Kg/L
Oxidant
weight = Tank Volume X NOX Density
Oxidant weight
= 0.571 L X
0.77 Kg/L
= 0.44 Kg
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Table
7 |
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Intrduction | Oxidizer
| Fuel | Tank |
Assembly | Test
Stand |
| Static Test | Results
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| Links | Spanish
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Contents
of these web pages are presented for informational and educational
purposes only. Author of this web site disclaims any liability
for the use readers make of the information presented herein
or for damage caused by hardware resulting from information
contained within these web pages. |
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