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Book Thermal Stress Analysis of a New Turbine Shroud Seal Concept

Download or read book Thermal Stress Analysis of a New Turbine Shroud Seal Concept written by and published by . This book was released on 1985 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Thermal Stress Analysis of Ceramic Gas path Seal Components for Aircraft Turbines

Download or read book Thermal Stress Analysis of Ceramic Gas path Seal Components for Aircraft Turbines written by Francis E. Kennedy and published by . This book was released on 1979 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Experimental and Analytical Study of Ceramic coated Turbine tip Shroud Seals for Small Turbine Engines

Download or read book Experimental and Analytical Study of Ceramic coated Turbine tip Shroud Seals for Small Turbine Engines written by and published by . This book was released on 1985 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to validate component rig results and the analytical model of the behavior of a ceramic material in the operating environment of a small turbine engine. The ceramic shroud has the potential of increasing small turbine-engine efficiency through use of higher gas-path temperatures or less shroud cooling air, of extending component life through reduced metal temperatures, or of reducing component weight. The ceramic shrouds were subjected to 1001 cycles between idle and high power and steady-state conditions for a total of 57.8 engine hr. Posttest engine inspection revealed mud-flat surface cracking, which the authors attributed to microcracking under tension with crack penetration to the ceramic-and bond-coat interface. Sections and micrographs tend to corroborate the thesis. The engine test data provided input to a thermomechanical analysis to predict temperature and stress profiles throughtout the ceramic gas-path seal. The analysis predicts cyclic thermal stresses large enough to cause the seal to fail. These stresses are, however, mitigated by inelastic behavior of the shroud materials and by microfracturing that tensile stresses produce. Microfracturing enhances shroud longevity during early life but provides the failure mechanism during extended life when coupled with time-dependent inelastic materials effects. Keywords: Turboshaft engines, Ground tests, and Ceramic bond.

Book Government Reports Annual Index

Download or read book Government Reports Annual Index written by and published by . This book was released on 1986 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Book British Ceramic Abstracts

Download or read book British Ceramic Abstracts written by and published by . This book was released on 1987 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monthly Catalogue United States Public Documents

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1990 with total page 1300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1986 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NASA Patent Abstracts Bibliography

    NASA Patent Abstracts Bibliography

    Book Details:
  • Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Program
  • Publisher :
  • Release : 1993
  • ISBN :
  • Pages : 652 pages

Download or read book NASA Patent Abstracts Bibliography written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Program and published by . This book was released on 1993 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Use of Services for Family Planning and Infertility United States 1982

Download or read book Use of Services for Family Planning and Infertility United States 1982 written by Gerry E. Hendershot and published by . This book was released on 1988 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 statistics on the use of family planning and infertility services presented in this report are preliminary results from Cycle III of the National Survey of Family Growth (NSFG), conducted by the National Center for Health Statistics. Data were collected through personal interviews with a multistage area probability sample of 7969 women aged 15-44. A detailed series of questions was asked to obtain relatively complete estimates of the extent and type of family planning services received. Statistics on family planning services are limited to women who were able to conceive 3 years before the interview date. Overall, 79% of currently mrried nonsterile women reported using some type of family planning service during the previous 3 years. There were no statistically significant differences between white (79%), black (75%) or Hispanic (77%) wives, or between the 2 income groups. The 1982 survey questions were more comprehensive than those of earlier cycles of the survey. The annual rate of visits for family planning services in 1982 was 1077 visits /1000 women. Teenagers had the highest annual visit rate (1581/1000) of any age group for all sources of family planning services combined. Visit rates declined sharply with age from 1447 at ages 15-24 to 479 at ages 35-44. Similar declines with age also were found in the visit rates for white and black women separately. Nevertheless, the annual visit rate for black women (1334/1000) was significantly higher than that for white women (1033). The highest overall visit rate was for black women 15-19 years of age (1867/1000). Nearly 2/3 of all family planning visits were to private medical sources. Teenagers of all races had higher family planning service visit rates to clinics than to private medical sources, as did black women age 15-24. White women age 20 and older had higher visit rates to private medical services than to clinics. Never married women had higher visit rates to clinics than currently or formerly married women. Data were also collected in 1982 on use of medical services for infertility by women who had difficulty in conceiving or carrying a pregnancy to term. About 1 million ever married women had 1 or more infertility visits in the 12 months before the interview. During the 3 years before interview, about 1.9 million women had infertility visits. For all ever married women, as well as for white and black women separately, infertility services were more likely to be secured from private medical sources than from clinics. The survey design, reliability of the estimates and the terms used are explained in the technical notes.