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Author :
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (317 download)
Download or read book Initial Results of a Porous Plug Nozzle for Supersonic Jet Noise Suppression written by and published by . This book was released on 1978 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (317 download)
Download or read book Computational Study of a Contoured Plug-nozzle as a Supersonic Jet Noise Suppressor written by and published by . This book was released on 1996 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722313494
Total Pages : 84 pages
Book Rating : 4.3/5 (134 download)
Download or read book Computational Study of a Contoured Plug-Nozzle As a Supersonic Jet Noise Suppressor written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes a computational jet noise study of an ideal contoured plug-nozzle (CPN). The gasdynamics of the jet flows have been predicted using the CFD code, NPARC with k-epsilon turbulence model; these data are then used as inputs to perform the noise computations based on the modified version of General Electric MGB code. The study covers a range of operating pressure ratio, 2.0 less than xi less than 5.0 (shockless flow at design pressure ratio, xi(d) = 3.62). The agreement of the computational aeroacoustics results with the available experimental data may be considered to be favorable. The computational results indicate consistent noise reduction effectiveness of the CPN at all operating pressure ratios. At the design pressure ratio (shockless), the codes predict overall sound pressure levels within +3.O dB of the experimental data. But at the off-design pressure ratios (flaws with shocks), the agreement is rather mixed. The theory overpredicts the OASPL's at all pressure ratios except at lower angles to the jet axis in overexpanded mode (xi less than xi(d)), the deviations being within 4.5 dB. The mechanism of shock formations in the CPN jet flows is noted to be basically different from those in the convergent-divergent nozzle jet flows. Khavaran, A. and Das, A. P. and Das, I.S. Glenn Research Center...
Author : M. J. T. Smith
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (11 download)
Download or read book The Noise Performance of a Supersonic Plug Nozzle written by M. J. T. Smith and published by . This book was released on 1967 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Douglas E. Harrington
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (31 download)
Download or read book Thrust Performance of Isolated 36-chute Suppressor Plug Nozzles with and Without Ejectors at Mach Numbers from 0 to 0.45 written by Douglas E. Harrington and published by . This book was released on 1975 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronald G. Huff
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.F/5 ( download)
Download or read book Cold-flow Acoustic Evaluation of a Small-scale, Divergent, Lobed Nozzle for Supersonic Jet Noise Suppression written by Ronald G. Huff and published by . This book was released on 1975 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James R. Stone
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Noise Suppression Nozzles for a Supersonic Business Jet written by James R. Stone and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. B. Moore
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (227 download)
Download or read book Application of Extended Plug Nozzle Noise Suppression Theory to a Small Turbojet Engine written by H. B. Moore and published by . This book was released on 1965 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small scale tests showed the best overall results when: (1) The area of the plug equals the annular flow area between the plug and nozzle. (2) A plug length ranging from zero to two nozzle diameters before the start of the termination. (3) A plug termination of a 10 degree straight taper. This configuration reduced the noise by about 10 db at a pressure ratio of 3.0 with a corresponding thrust loss of about 6%. On the WR2-2 turbojet engine, the extended plug nozzle similarly reduced exhaust noise although to a smaller extent. A 3 db reduction in noise was achieved with a corresponding thrust loss of 4%, however, the engine was only operated up to an exhaust pressure ratio of 2.5. Another nozzle showed a 1 1/2 db reduction with a corresponding thrust increase of 5%. The extended plug nozzle approach to jet noise suppression shows promise. (Author).
Author : Douglas E. Harrington
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.F/5 ( download)
Download or read book Thrust Performance of Isolated Plug Nozzles with Two Types of 40-spoke Noise Suppressor at Mach Numbers from 0 to 0.45 written by Douglas E. Harrington and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plug nozzles with two types of 40-spoke noise suppressor were tested at free-stream Mach numbers from 0 to 0.45 and over a range of nozzle pressure ratios from 1.5 to 4.0. In addition, an unsuppressed plug nozzle and a Supersonic Tunnel Association nozzle were also tested to provide baseline levels of thrust performance. The unsuppressed plug nozzle had an efficiency of 98 percent at an assumed takeoff pressure ratio of 3.0 and at Mach 0.36. At the same condition the suppressor nozzles had efficiencies of approximately 83.5 percent.
Author : W. J. Bannink
Publisher :
ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (681 download)
Download or read book Preliminary Study of a Plug Nozzle Model in Supersonic Flow written by W. J. Bannink and published by . This book was released on 1998 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Krothapalli
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Supersonic Jet Noise Suppression by Water Injection written by A. Krothapalli and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Douglas E. Harrington
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (31 download)
Download or read book Thrust performance of isolated two dimension suppressed plug nozzles with and without ejectors at mach numbers from 0 to 0.45 written by Douglas E. Harrington and published by . This book was released on 1976 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Albert L. Johns
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (11 download)
Download or read book Internal Performance of a Wedge Nozzle for a Supersonic Cruise Aircraft with a Multispoke Primary for Noise Suppression written by Albert L. Johns and published by . This book was released on 1973 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Warren J. North
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (249 download)
Download or read book Summary Evaluation of Toothed-nozzle Attachments as a Jet-noise-suppression Device written by Warren J. North and published by . This book was released on 1955 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sound pressure levels were reduced behind the engine but were increased elsewhere. A typical resident in the airport neighborhood would hear increased loudness in the middle frequencies; however, the resulting over-all auditory effect is considered to be negligible.
Author :
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (317 download)
Download or read book Aeroacoustics of Supersonic Jet Flows from Contoured and Solid/porous Conical Plug-nozzles written by and published by . This book was released on 1987 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew B. Bauer
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (317 download)
Download or read book Jet Noise Suppression by Porous Plug Nozzles written by Andrew B. Bauer and published by . This book was released on 1982 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jean François Louis
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (221 download)
Download or read book A systematic Study of supersonic jet noise written by Jean François Louis and published by . This book was released on 1971 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
