Download or read book Further Investigations of Hypersonic Engine Seals written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-21 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durable, flexible sliding seals are required in advanced hypersonic engines to seal the perimeters of movable engine ramps for efficient, safe operation in high heat flux environments at temperatures of 2000 to 2500 F. Current seal designs do not meet the demanding requirements for future engines, so NASA's Glenn Research Center is developing advanced seals and preloading devices to overcome these shortfalls. An advanced ceramic wafer seal design and two silicon nitride compression spring designs were evaluated in a series of compression, scrub, and flow tests. Silicon nitride wafer seals survived 2000 in. (50.8 m) of scrubbing at 2000 F against a silicon carbide rub surface with no chips or signs of damage. Flow rates measured for the wafers before and after scrubbing were almost identical and were up to 32 times lower than those recorded for the best braided rope seal flow blockers. Silicon nitride compression springs showed promise conceptually as potential seal preload devices to help maintain seal resiliency. Dunlap, Patrick H., Jr. and Steinetz, Bruce M. and DeMange, Jeffrey J. Glenn Research Center NASA/TM-2004-213188, E-14687, AIAA Paper 2004-3887

Download or read book Proceedings of the 2022 International Conference on Smart Manufacturing and Material Processing SMMP2022 written by A. Nayyar and published by IOS Press. This book was released on 2022-11-29 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart manufacturing is a broad category of manufacturing that employs computer-integration, high levels of adaptability and rapid design changes, together with digital information technology and a technically-trained workforce. This book presents the proceedings of SMMP2022, the 2022 International Conference on Smart Manufacturing and Material Processing, held on 12 and 13 August 2022 as a virtual event due to continuing restrictions related to the COVID-19 pandemic, and hosted from Shanghai, China. The conference provides a platform for researchers and scientists from smart manufacturing and material sciences to come together with researchers from various other application areas to discuss problems and solutions, identify new issues, and shape future directions for research. The conference received 60 submissions. These were submitted to a rigorous peer review process by a committee of experts from various disciplines, after which, 23 were accepted for presentation at the conference and publication here. The topics covered include materials processing and product manufacture, sensors and smart material systems, functional materials, industrial automation and process control, and discussion of the state-of-the-art and future direction of smart manufacturing and material sciences. Providing an overview of current developments in smart manufacturing and material processing, the book will be of interest to all those working in the field.

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Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

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