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Evaluation And Ranking Of Candidate Ceramic Wafer Engine Seal Materials
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722209605 Total Pages :28 pages Book Rating :4.2/5 (96 download)
Book Synopsis Evaluation and Ranking of Candidate Ceramic Wafer Engine Seal Materials by : National Aeronautics and Space Administration (NASA)
Download or read book Evaluation and Ranking of Candidate Ceramic Wafer Engine Seal Materials written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern engineered ceramics offer high temperature capabilities not found in even the best superalloy metals. The high temperature properties of several selected ceramics including aluminum oxide, silicon carbide, and silicon nitride are reviewed as they apply to hypersonic engine seal design. A ranking procedure is employed to objectively differentiate among four different monolithic ceramic materials considered, including: a cold-pressed and sintered aluminum oxide; a sintered alpha-phase silicon carbide; a hot-isostatically pressed silicon nitride; and a cold-pressed and sintered silicon nitride. This procedure is used to narrow the wide range of potential ceramics considered to an acceptable number for future detailed and costly analyses and tests. The materials are numerically scored according to their high temperature flexural strength; high temperature thermal conductivity; resistance to crack growth; resistance to high heating rates; fracture toughness; Weibull modulus; and finally according to their resistance to leakage flow, where materials having coefficients of thermal expansion closely matching the engine panel material resist leakage flow best. The cold-pressed and sintered material (Kyocera SN-251) ranked the highest in the overall ranking especially when implemented in engine panels made of low expansion rate materials being considered for the engine, including Incoloy and titanium alloys. Steinetz, Bruce M. Glenn Research Center RTOP 505-63-5B...
Book Synopsis Evaluation and Ranking of Candidate Ceramic Wafer Engine Seal Materials by :
Download or read book Evaluation and Ranking of Candidate Ceramic Wafer Engine Seal Materials written by and published by . This book was released on 1991 with total page 30 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 1991 with total page 1460 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.
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995-12 with total page 1094 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 11-14, 2004, Fort Lauderdale, FL.: 04-3850 - 04-3899 by :
Download or read book 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 11-14, 2004, Fort Lauderdale, FL.: 04-3850 - 04-3899 written by and published by . This book was released on 2004 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of an Innovative High Temperature Ceramic Wafer Seal for Hypersonic Engine Applications by : Bruce M. Steinetz
Download or read book Evaluation of an Innovative High Temperature Ceramic Wafer Seal for Hypersonic Engine Applications written by Bruce M. Steinetz and published by . This book was released on 1991 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1991 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications in Engineering written by and published by . This book was released on 1993 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Temperature Performance Evaluation of a Hypersonic Engine Ceramic Wafer Seal by : National Aeronautics and Space Adm Nasa
Download or read book High Temperature Performance Evaluation of a Hypersonic Engine Ceramic Wafer Seal written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-10-22 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leakage rates of an innovative hypersonic engine seal were measured using a specially developed static high temperature seal test fixture at NASA Lewis Research Center. The three foot long structural panel-edge seal is designed to minimize leakage of high temperature, high pressure gases past the movable panels of advanced ramjet/scramjet engines. The seal is made of a stack of precision machined ceramic wafer pieces that are inserted into a closely conforming seal channel in the movable engine panel. The wafer seal accommodates the significant distortions in the adjacent engine walls through relative sliding between adjacent wafers. Seal leakage rates are presented for engine simulated air temperatures up to 1350 F and for engine pressures up to 100 psi. Leakage rates are also presented for the seal, sealing both a flat wall condition, and an engine simulated distorted wall condition in which the distortion was 0.15 in. in only an 18 in. span. Seal leakage rates were low, meeting an industry-established tentative leakage limit for all combinations of temperature, pressure, and wall conditions considered. Comparisons are made between the measured leakage rates and leakage rates predicted using a seal leakage model developed from externally-pressurized gas film bearing theory. Steinetz, Bruce M. Glenn Research Center RTOP 505-63-5B...
Book Synopsis High Temperature Performance Evaluation of a Hypersonic Engine Ceramic Wafer Seal by :
Download or read book High Temperature Performance Evaluation of a Hypersonic Engine Ceramic Wafer Seal written by and published by . This book was released on 1991 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography of Lewis Research Center Technical Publications Announced in 1991 by :
Download or read book Bibliography of Lewis Research Center Technical Publications Announced in 1991 written by and published by . This book was released on 1992 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rotating Machinery-1992 by : Wen-Jei Yang
Download or read book Rotating Machinery-1992 written by Wen-Jei Yang and published by Begell House Publishers. This book was released on 1993 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern rotating machines operate under more severe environments than in the past, and are required to produce increased output and to perform demanding tasks hitherto unforeseen. Better understanding, sophisticated testing and analysis, and accurate modeling of transport phenomena and dynamics are of paramount importance in predicting performance and improving the design of such machines. This two-volume set addresses these concerns and related design aspects of rotating machinery.
Book Synopsis A New Tribological Test for Candidate Brush Seal Materials Evaluation by : James A. Fellenstein
Download or read book A New Tribological Test for Candidate Brush Seal Materials Evaluation written by James A. Fellenstein and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Ceramic Seal Program (Phase I). by : P. W. Schlike
Download or read book Advanced Ceramic Seal Program (Phase I). written by P. W. Schlike and published by . This book was released on 1974 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Screening of candidate ceramic seal materials was conducted to select the most promising systems for turbine seal component development. Vendor screening coupled with a literature search and preliminary thermal analysis identified five ceramic seal systems and one blade tip system for testing and evaluation in this contract. The ceramic seal materials were divided into two categories (1) insulative ceramic materials which could be applied to a metallic substrate and (2) structural ceramic materials to be mechanically held in place. Yittria stabilized zirconia was selected as the primary insulative ceramic material and reaction sintered silicon nitride was selected as the primary structural ceramic material to be used in these systems. Physical properties measurements of: coefficient of thermal expansion, thermal conductivity, and modulus of elasticity were performed on the selected seal materials. Thermal shock, oxidation/erosion and abradability were conducted on the seal and blade tip systems. Analysis of the test results and thermal and stress analysis under advanced engine conditions resulted in the selection of the best graded metal/ceramic system and the best structural system for turbine seal component development. Hot pressed silicon nitride and hot pressed silicon carbide were also analyzed for thermal and stress levels under advanced engine conditions. The recommended systems are: System 3 (yittria/calcia stabilized zirconia graded with a nickel chromium metallic constituent and brazed to a metallic substrate) and hot pressed silicon carbide. (Author).
Book Synopsis Seals and Sealing Handbook by : Ronald Horace Warring
Download or read book Seals and Sealing Handbook written by Ronald Horace Warring and published by . This book was released on 1981 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
