+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Tomazic, William A. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 5 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Effect of water on hydrogen permeability Author(s): Hulligan, David; Tomazic, William A. Abstract: Doping of hydrogen with CO and CO2 was developed to reduce hydrogen permeation in Stirling engines by forming a low permeability oxide coating on the inner surface of the heater head tubes. Although doping worked well, under ... NASA Center: Glenn Research Center Publication Year: 1987 Added to NTRS: 2005-10-13 Accession Number: 87N16664; Document ID: 19870007231; Report Number: DOE/NASA-50112-68, E-3321, NAS 1.15:88898, NASA-TM-88898 Effect Of Water On Permeation By Hydrogen Author(s): Tomazic, William A.; Hulligan, David Abstract: Water vapor in working fluid equilibrates with permeability-reducing oxides in metal parts. Report describes study of effects of water on permeation of heater-head tubes by hydrogen in Stirling engine. Experiments performed ... NASA Center: Glenn Research Center Publication Year: 1988 Added to NTRS: 2005-09-30 Accession Number: 88B10583; Document ID: 19880000583; Report Number: LEW-14648 Hot piston ring tests Author(s): Allen, David J.; Tomazic, William A. Abstract: As part of the DOE/NASA Automotive Stirling Engine Project, tests were made at NASA Lewis Research Center to determine whether appendix gap losses could be reduced and Stirling engine performance increased by installing an ... NASA Center: Glenn Research Center Publication Year: 1987 Added to NTRS: 2005-08-25 Accession Number: 88N14486; Document ID: 19880005104; Report Number: DOE/NASA/50112-72, E-3808, NAS 1.15:100256, NASA-TM-100256 Comparison of hydrazine-nitrogen tetroxide and hydrazine-chlorine trifluoride in small-scale rocket chambers Author(s): Rollbuhler, R. James; Tomazic, William A. Abstract: No Abstract Available NASA Center: Glenn Research Center Publication Year: 1959 Added to NTRS: 2005-08-25 Accession Number: 89N70615; Document ID: 19890068242; Report Number: NASA-TN-D-131 Theoretical Performance of Hydrogen-Oxygen Rocket Thrust Chambers Author(s): Sievers, Gilbert K.; Tomazic, William A.; Kinney, George R. Abstract: Data are presented for liquid-hydrogen-liquid-oxygen thrust chambers at chamber pressures from 15 to 1200 pounds per square inch absolute, area ratios to approximately 300, and percent fuel from about 8 to 34 for both ... NASA Center: Glenn Research Center Publication Year: 1961 Added to NTRS: 2005-08-25 Document ID: 19980227353; Report Number: NASA-TR-R-111 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007