Ignition of nonmetallic materials by impact of high-pressure gaseous oxygenThe sources of variability in the pneumatic impact test commonly used to screen nonmetallic materials for oxygen service and to rank batches or lots of particular materials were investigated together with the mechanism of ignition. Tests were conducted at the NASA/White Sands Test Facility in which the standard test chamber was replaced by an instrumented chamber to obtain information on the rates of pressurization, specimen heating, and time to ignition. Results showed that much of the variability in test data could be traced to the variability in system cleanliness and in the opening time of the high-speed valve. The prinicipal mechanism of ignition in the test is considered to be the heating of the gas initially in the test chamber by adiabatic compression; the presence of voids in the test materials may also be important.
Document ID
19890045567
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Moffett, Gary E. (NASA White Sands Test Facility NM, United States)
Pedley, Michael D. (NASA White Sands Test Facility NM, United States)
Schmidt, Naomi (NASA White Sands Test Facility NM, United States)
Williams, Ralph E. (NASA White Sands Test Facility NM, United States)
Hirsch, David (NASA White Sands Test Facility; Lockheed Engineering and Management Services, Co., Inc. Las Cruces, NM, United States)
Benz, Frank J. (NASA White Sands Test Facility Las Cruces, NM, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres