STP1040: Ignition of Nonmetallic Materials by Impact of High-Pressure Oxygen II: Evaluation of Repeatability of Pneumatic Impact Test

    Schmidt, N
    scientistsaerospace engineeradvanced systems engineering specialist with Lockheed-ESC, NASA Johnson Space Center White Sands Test Facility, Las CrucesHouston, NMTX

    Moffett, GE
    scientistsaerospace engineeradvanced systems engineering specialist with Lockheed-ESC, NASA Johnson Space Center White Sands Test Facility, Las CrucesHouston, NMTX

    Pedley, MD
    scientistsaerospace engineeradvanced systems engineering specialist with Lockheed-ESC, NASA Johnson Space Center White Sands Test Facility, Las CrucesHouston, NMTX

    Linley, LJ
    scientistsaerospace engineeradvanced systems engineering specialist with Lockheed-ESC, NASA Johnson Space Center White Sands Test Facility, Las CrucesHouston, NMTX

    Pages: 15    Published: Jan 1989


    Abstract

    The gaseous oxygen pneumatic impact test is used to evaluate the suitability of nonmetallic materials for use in high-pressure oxygen systems. The test was evaluated by testing the reactivity of four materials over a range of impact pressures. The evaluation also investigated the effect of valve opening time and other test variables on the frequency of reaction. The variability of the data obtained for each test material was too large for the test method to be capable of distinguishing other than gross differences in the reactivity of materials. No relation was found between this variability and changes in valve opening time and other test variables. The materials studied were found to be unacceptable for use as reference standards. Because of the high variability of the test data, it is recommended that new methods be developed for evaluating the suitability of materials for use in high-pressure oxygen systems.

    Keywords:

    ignition, oxygen, pressure, adiabatic, pneumatic impact, sensitivity


    Paper ID: STP24918S

    Committee/Subcommittee: G04.01

    DOI: 10.1520/STP24918S


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