Download or read book Acoustic Treatment Design Scaling Methods written by and published by . This book was released on 1999 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Treatment Design Scaling Methods written by R. E. Kraft and published by . This book was released on 1999 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Langley Scientific and Technical Information Output 1999 written by and published by . This book was released on 2000 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Treatment Design Scaling Methods Volume 3 Test Plans Hardware Results and Evaluation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to design, build, and test miniaturized acoustic treatment panels on scale-model fan rigs representative of the full-scale engine provides not only a cost-savings, but an opportunity to optimize the treatment by allowing tests of different designs. To be able to use scale model treatment as a full-scale design tool, it is necessary that the designer be able to reliably translate the scale model design and performance to an equivalent full-scale design. The primary objective of the study presented in this volume of the final report was to conduct laboratory tests to evaluate liner acoustic properties and validate advanced treatment impedance models. These laboratory tests include DC flow resistance measurements, normal incidence impedance measurements, DC flow and impedance measurements in the presence of grazing flow, and in-duct liner attenuation as well as modal measurements. Test panels were fabricated at three different scale factors (i.e., full-scale, half-scale, and one-fifth scale) to support laboratory acoustic testing. The panel configurations include single-degree-of-freedom (SDOF) perforated sandwich panels, SDOF linear (wire mesh) liners, and double-degree-of-freedom (DDOF) linear acoustic panels.Yu, J. and Kwan, H. W. and Echternach, D. K. and Kraft, R. E. and Syed, A. A.Langley Research CenterAIRCRAFT NOISE; ACOUSTIC PROPERTIES; SCALE MODELS; COST REDUCTION; FLOW RESISTANCE; GRAZING FLOW; IMPEDANCE MEASUREMENT; WIRE CLOTH; SANDWICH STRUCTURES; MINIATURIZATION; DEGREES OF FREEDOM; DUCTS

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2000 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 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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Download or read book EPA Publications Bibliography written by and published by . This book was released on 1985 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Aeronautical Engineering written by and published by . This book was released on 1992 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).

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