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Review Of Frictional Heating Test Results In Oxygen Enriched Environments
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Book Synopsis Review of Frictional Heating Test Results in Oxygen-Enriched Environments by : MV. Gunaji
Download or read book Review of Frictional Heating Test Results in Oxygen-Enriched Environments written by MV. Gunaji and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Friction is a known ignition source for metals and polymers in oxygen systems. This paper provides a review of the test results currently in the literature and an update of frictional ignition tests recently conducted at WSTF. Most of the results are presented in terms of the Pv product required for ignition (Pvign), where P is the normal load divided by the rubbing area and v is the relative linear velocity between the samples. Rankings based on Pvign are presented for similar and dissimilar pairs of metal alloy test samples. A comparison of the Pvign in liquid oxygen (LOX) and the PVign in gaseous oxygen (GOX) indicates that materials are approximately three to four times more difficult to ignite in LOX than in GOX. A discussion of the application of the data to material selection is also presented.
Book Synopsis Flammability and Sensitivity of Materials in Oxygen-enriched Atmospheres by : Joel M. Stoltzfus
Download or read book Flammability and Sensitivity of Materials in Oxygen-enriched Atmospheres written by Joel M. Stoltzfus and published by ASTM International. This book was released on 1993 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flammability and Sensitivity of Materials in Oxygen-enriched Atmospheres by : Dennis W. Schroll
Download or read book Flammability and Sensitivity of Materials in Oxygen-enriched Atmospheres written by Dennis W. Schroll and published by ASTM International. This book was released on 1988 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceeding held at Churchill College, Cambridge, England, April 1987. A reference for both the skilled and the uninitiated in the concepts and practices for the design and maintenance of all types of oxygen systems. Cov five areas: ignition of metals, nonmetal ignition, material selection for oxygen.
Book Synopsis The Measurement of the Friction Coefficient and Hear of Metals in High-Pressure Oxygen by : JM. Homa
Download or read book The Measurement of the Friction Coefficient and Hear of Metals in High-Pressure Oxygen written by JM. Homa and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The frictional forces generated during rubbing contact of metals greatly influence the ignitability of the bulk material when exposed to high-pressure oxygen environments. Previous works have ranked the ignition susceptibility of metals by frictional heating tests and by promoted combustion tests. Variations in the rankings by these two methods have been explained by differences in the friction coefficient and the resulting differences in frictional heat generation. A material with a higher coefficient of friction will produce more heat and will therefore achieve its ignition temperature at a lower PV product, where P is the normal load divided by the rubbing area and V is the relative linear velocity between the samples. A ranking of frictional ignition data taking into account the friction coefficient was shown to agree quite well with promoted combustion rankings. To further investigate the effects of the friction coefficient on ignition, a series of pin-on-disk friction tests were performed on five selected metals. These tests measured the friction and wear of each metal during the pre-ignition phase, while exposed to high-pressure oxygen. Wear characteristics appeared dramatically different for the pin-on-disk tests compared to the hollow cylinder configuration of the frictional heating test for some materials. Among the metals tested, three types of wear were observed: a severe adhesive wear resulting in high frictional forces; a mild wear characterized by a glazed oxide coating and low friction coefficients; and an adhesive-delamination wear combined with the release of many burning wear particles. The wear configuration was found to be extremely important when assessing the frictional heating properties that lead to ignition in oxygen-enriched atmospheres.
Book Synopsis Safe Use of Oxygen and Oxygen Systems by :
Download or read book Safe Use of Oxygen and Oxygen Systems written by and published by ASTM International. This book was released on with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling and Data Analysis of the NASA-WSTF Frictional Heating Apparatus by : FJ. Benz
Download or read book Modeling and Data Analysis of the NASA-WSTF Frictional Heating Apparatus written by FJ. Benz and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical model is being developed jointly by the NASA White Sands Test Facility (WSTF) and the University of California at Santa Barbara (UCSB) to analyze data generated from the WSTF frictional heating test facility. Analyses of the data generated in the first seconds of the frictional heating test are shown to be effective in determining the friction coefficient between the rubbing interfaces. Different friction coefficients for carbon steel and Monel K-500® are observed. The initial condition of the surface is shown to affect only the initial value of the friction coefficient but to have no significant influence on the average steady-state friction coefficient. Rotational speed and the formation of oxide film on the rotating surfaces are shown to have a significant effect on the friction coefficient.
Book Synopsis Flammability and Sensitivity of Materials in Oxygen-enriched Atmospheres by : David B. Hirsch
Download or read book Flammability and Sensitivity of Materials in Oxygen-enriched Atmospheres written by David B. Hirsch and published by ASTM International. This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved ASTM G72 Test Method for Ensuring Adequate Fuel-to-Oxidizer Ratios by : Alfredo Juarez
Download or read book Improved ASTM G72 Test Method for Ensuring Adequate Fuel-to-Oxidizer Ratios written by Alfredo Juarez and published by . This book was released on 2016 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: ASTM G72/G72M-15, Standard Test Method for Autogenous Ignition Temperature of Liquids and Solids in a High-Pressure Oxygen-Enriched Environment, is currently used to evaluate materials for ignition susceptibility driven by exposure to external heat in an enriched oxygen environment. Testing performed on highly volatile liquids such as cleaning solvents has proven problematic due to inconsistent test results (nonignitions). Nonignition results can be misinterpreted as favorable oxygen compatibility, although they are more likely associated with inadequate fuel-to-oxidizer ratios. Forced evaporation during purging and inadequate sample size were identified as two potential causes for inadequate available sample material during testing. In an effort to maintain adequate fuel-to-oxidizer ratios within the reaction vessel during a test, several parameters were considered, including sample size, pretest sample chilling, pretest purging, and test pressure. Tests on a variety of solvents exhibiting a range of volatilities are presented in this paper. A proposed improvement to the standard test protocol as a result of this evaluation is also presented. Execution of the final proposed improved test protocol outlines an incremental step method of determining optimal conditions using increased sample sizes while considering test system safety limits. The proposed improved test method increases confidence in results obtained by utilizing the ASTM G72 autogenous ignition temperature test method and can aid in the oxygen compatibility assessment of highly volatile liquids and other conditions that may lead to false nonignition results.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1985 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hyperbaric Facility Safety, 2nd Edition by : W.T. Workman
Download or read book Hyperbaric Facility Safety, 2nd Edition written by W.T. Workman and published by Best Publishing. This book was released on 2020-03-01 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: When the first edition of Hyperbaric Facility Safety, A Practical Guide was published it became an integral part of virtually every hyperbaric facility’s reference library, serving as the go-to standard for a hyperbaric safety program. In this second edition, editors W.T. “Tom” Workman and J. Steven “Steve” Wood have endeavored to establish a comprehensive balance between those hyperbaric providers who have a keen interest in the underlying design standards and regulatory framework and those who need to “get it done.” The second edition is structured into two parts. The first part explains the various regulatory agencies that may influence the field of hyperbaric medicine (including international perspectives), while the second part emphasizes a nuts-and-bolts approach to hyperbaric safety program development and how the safety program integrates all aspects of a hyperbaric facility. The editors, along with the 80 chapter authors and contributors bring experiences from clinical hyperbaric medicine, the U.S. Air Force and Navy, the UHMS Hyperbaric Facility Accreditation program, hyperbaric chamber engineering, manufacturing, and regulatory/standards development.
Download or read book Fossil Energy Update written by and published by . This book was released on 1984 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-05 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis National Fire Codes by : National Fire Protection Association
Download or read book National Fire Codes written by National Fire Protection Association and published by . This book was released on 2001 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. National Aeronautics and Space Administration Scientific and Technical Information Division Publisher : ISBN 13 : Total Pages :262 pages Book Rating :4.F/5 ( download)
Book Synopsis Lubrication, Corrosion and Wear by : United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Download or read book Lubrication, Corrosion and Wear written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
