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Monday, August 10, 2020 | History

3 edition of Final report on high pressure oxygen turbopump bearing cage stability analyses found in the catalog.

Final report on high pressure oxygen turbopump bearing cage stability analyses

Final report on high pressure oxygen turbopump bearing cage stability analyses

(contract NAS8-34908, Task 113)

  • 344 Want to read
  • 37 Currently reading

Published by Battelle, Columbus Laboratories, George C. Marshall Space Flight Center in Columbus, Ohio, Marshall Space Flight Center, Ala .
Written in English

    Subjects:
  • Turbine pumps.,
  • Space shuttles -- Propulsion systems.

  • Edition Notes

    Other titlesHigh pressure oxygen turbopump bearing cage stability analyses.
    Statementto National Aeronautics and Space Administration, George C. Marshall Space Flight Center by T.L. Merriman and J. W. Kannel.
    Series[NASA contractor report] -- NASA CR-170991., NASA contractor report -- NASA CR-170991.
    ContributionsKannel, J. W., Battelle Memorial Institute. Columbus Laboratories., George C. Marshall Space Flight Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL16116887M

    Medical Oxygen Generator with Storage Tank @30 barg pressure. This complete system uses Medical Oxygen generator to produce oxygen at a pressure of 5 barg Medical Oxygen produced is then sent to Oxygen booster to pressurize it to 30 bar g The final gas pressurized by the oxygen booster is then allowed to be stored in the storage tank provided This gas stored is then connected to the hospital. The therapeutic use of a high-pressure oxygen atmosphere is of current research interest. Accounts of this means of treatment have come mainly from Amsterdam and Glasgow, but also from the United States. Reports indicate its value in treatment of coronary artery disease, severe shock, cerebral vascular accidents, gangrene, infections, carbon.

    Ground Bearing Pressure Calculator Kobelco is a Global manufacturer of crawler cranes. The CK and SL series are the only Models that meet ANSIB.5 regulations and therefore are the only Models eligible for use and support in North America. Ground Bearing Pressure Calculator. Please note that the calculator only works with Internet Explorer. Linear regression analyses showed a similar linear relationship be-tween flow and pressures measured in the pharynx (pressure flow) and in the airway (pressure flow) with the closed mouth condition. CONCLUSIONS: According to our hypothesis, high-flow oxygen therapy systems produced a low-level CPAP in an.

    BACKGROUND: The mechanism of high-flow oxygen therapy and the pressures reached in the airway have not been defined. We hypothesized that the flow would generate a low continuous positive pressure, and that elevated flow rates in this model could produce moderate pressures. The objective of this study was to analyze the pressure generated by a high-flow oxygen therapy system in an . Excelling under pressure. Most specialty gases are supplied in cylinders compressed to high pressures. Pressure regulators reduce the pressure within the cylinders to a level that can be safely used in your operating system. Proper regulator selection is critical for both the safety and effectiveness of your operating systems.


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Final report on high pressure oxygen turbopump bearing cage stability analyses Download PDF EPUB FB2

Final report on high pressure oxygen turbopump bearing cage stability analyses. Columbus, Ohio: Battelle, Columbus Laboratories ; Marshall Space Flight Center, Ala.: George C.

Marshall Space Flight Center, [] (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type. Get this from a library. Final report on high pressure oxygen turbopump bearing cage stability analyses: (contract NAS, Task ).

[T L Merriman; J W Kannel; Battelle Memorial Institute. Columbus Laboratories.; George C. Marshall Space Flight Center.]. final report on investigation of instability, dynamic forces, and effect of dynamic loading on strength of cages for the bearings in the high pressure oxygen turbopumps for the space shuttle main engine (contract nas, task no.

) prepared for national aeronautics and space admini strati on george c. marshall space flight center. The low service life of the high pressure oxygen turbopump (HPOTP) bearings used in the space shuttle main engine was examined by use of the Battelle "BASDAP' bearing computer stability model.

The dynamic instability of the bearing cage resulted in excessive wear and eventual failure of the : J. Kannel and T. Merriman. for high speed bearings are largely determined by contact stress limitations and load-carrying requirements.

For the Space Shuttle main engine (SSME) high pressure oxidizer turbopump (HPOTP) bearings, the ball and race designs have been refined over several years through extensive analysis and testing at NASA and Rocketdyne. Merriman's 10 research works with 10 citations and reads, including: Apparatus for Extensional Viscosity Measurements.

The partial pressure of oxygen in the air you inhale: At higher altitudes (such as in mountainous areas), the decrease in atmospheric pressure reduces oxygen availability—and oxygen pressure in your lungs.

A neurological condition, such as Guillain-Barre Syndrome or Amyotrophic lateral sclerosis (ALS) Damage to the lungs due to trauma or cancer. Report presents evaluation of bronze-filled polytetrafluoroethylene (PTFE), known as Salox M, as cage material for ball bearings in high-pressure turbopumps for liquid oxygen.

Automate Oxygen Generators Remove High Pressure vents where you don't need them Expand your base in general #1. Alkaline. @ pm I too am having a ♥♥♥♥♥ of a time keeping pressure low. Most of my base was sitting at 3k and I have no idea how it got so high.

I dont have a single high pressure vent in my base. Full text of "NASA Technical Reports Server (NTRS) Small, high-pressure liquid hydrogen turbopump" See other formats. The bias instability of the TFTs with GIGO active layers was also investigated as a function of oxygen partial pressure under a positive bias stress (PBS) condition, with a gate bias of +20 V after 0, 33,and s, as shown in Fig.

the stress time lapses, the transfer characteristics of the GIGO TFTs systematically shift in the positive direction, without any significant. Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other hydrogen and helium, oxygen is the third-most abundant element in the universe by mass.

At standard temperature and pressure, two. Oxygen Properties Normal concentration in air is 21% Colorless, odorless and tasteless. Cannot be detected by human senses Not flammable but supports and accelerates combustion. Flammable materials, including some materials that are normally relatively non-flammable in air, burn very rapidly in high oxygen concentrations.

Three elements necessary for an oxygen fire are an ignition source, oxygen. Full text of "NASA Technical Reports Server (NTRS) Turbopump systems for liquid rocket engines" See other formats. Figure 1 shows how O 2 sequentially moves down its pressure gradient from moist inspired air to its site of utilization at the mitochondria.

Thus, for dry air (% O 2) at sea level (barometric pressure Torr) PO 2 is / × = Torr. For oxygen piping systems I'd recommend using CGA specification G "Oxygen Pipeline Systems". Our company uses CGA religiously for stuff like this. Per G, para"Materials that are found to be flammable within the very high pressure range [which this falls into] should be subject to oxygen gas velocity limitations as indicated in.

This paper describes the rotor dynamic stability analysis and the PTC Class 1 test of a three body centrifugal compressor train for high pressure natural gas injection service. This train had a full load full pressure string test on hydrocarbon gasses to a final discharge pressure of BAR ( PSIA).

The oxygen saturation of blood is measured either by a haemore-flector or less accurately by an ear oximeter. The normal oxygen saturation of actual blood is 95–98% at a normal oxygen pressure (PO 2) of mmHg.

In venous blood the saturation drops to about 74% with a PO 2 of 40 mmHg. A mixed venous oxygen saturation below 60% is very. High pressure O2 does not play well with any oil or organic material.

Never use any kind of oil lube on O2 fittings that is not designed for oxygen service. Generally all cylinders must be hydrostat tested on a regular basis, the time interval determined by. digital pressure calibration gauges. In order to arrive at the final 1 year specification, we must combine all of the elements and do a s tatistical analysis to arrive a final accuracy specification.

The generally accepted method for going this analysis is the RSS (Root Sum Square) calculation which is widely used in the field of statistics.

only if they are suitable for oxygen service and then used sparingly. Ordinary petroleum lubricants are not satisfactory and are particularly hazardous because of their high heat of combustion and high rate of reaction.

The approximate ignition temperatures in bar ( psig) oxygen for a few organic materials are shown in table 1. Table 1.laminar diffusion flames [40, 41, 44, 45], and on subgrid analyses of transitional three dimensional hydrogen-oxygen flames [42, 46] relevant to future predictive large eddy engineering simulations.

The particular objectives of the chapter are to examine the impact of high pressure on the choice.−20 feet from oxygen & combustible material. −Never place anything on top of cylinder. Oxygen −20 feet from flammable or combustible material. Separation can be 1 hour fire wall.

Cylinders in use or connected can be stored together.