Highlights of Aeroacoustics Research in the U.S.—1998

Raman, Ganesh; McLaughlin, Dennis K.

doi:10.1006/jsvi.1999.2429

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Two more reviews on aspects of jet noise and turbomachinery flows are worth noting here. 53,54 Based on the experiments done during these years, an analytical study addressed the effect of compressibility on jet spreading. It was shown that part of the effect of increased compressibility, e.g.…”

Section: Studies Of Excitation Techniques and Other Aspects Of Jet Flowsmentioning

confidence: 99%

Edward J Rice and flow control studies for jets and shear layers at NASA Glenn Research Center

Zaman

Raman

2016

International Journal of Aeroacoustics

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Dr. Edward (Ed) J Rice’s most notable technical contributions are in the areas of duct acoustics and sound-absorbing liner technology, which are the subjects of several of the articles in this special issue. Starting in 1984 until his retirement in 1993, Dr. Rice led a “shear flow control” effort at NASA Glenn Research Center. Both authors of this article were part of that effort under his supervision. This article provides a brief overview of the various aspects of that effort, in the form of a narrative with minimal technical details. It covers research areas in which Ed had direct and indirect contributions and includes some activities that continued after his retirement through the mid-1990s.

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Section: Studies Of Excitation Techniques and Other Aspects Of Jet Flowsmentioning

confidence: 99%

Edward J Rice and flow control studies for jets and shear layers at NASA Glenn Research Center

Zaman

Raman

2016

International Journal of Aeroacoustics

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“…NASA teamed with the Allison Engine Company to investigate new ways of reducing fan noise from turbofan engines. A 22-inch-scale model was built and tested (Woodward et al [1]) in the Glenn Research Center's 9x15-foot Low-Speed Wind Tunnel (see Figure 2). This work was successful in helping the program meet a major milestone with a demonstrated 3 EPNdB (Effective The noise reduction concept uses a highly swept and leaned geometry in the design of the outlet guide vanes.…”

Section: Noise Reduction Technology For Subsonic Transport Aircraftmentioning

confidence: 99%

“…The authors thank all those who contributed and graciously consented to the reproduction of illustrations. Excerpts from Ref [1] and photographs from NASA NP-1998-10-242-HQ [4] also appear in this article.…”

Section: Acknowledgementsmentioning

confidence: 99%

Recent Aeroacoustics Research in the United States

Raman

McLaughlin

2000

Noise & Vibration Worldwide

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It is expected that with the projected increase in air travel aeroacoustics research will be very critical in meeting increasingly stringent aircraft noise certification standards. In the United States aeroacoustics research has steadily progressed toward enhanced safety, noise benefits and lower costs. This report provides a brief summary of selected recent aeroacoustics activity in the US. Four topics of great interest to the aerospace industry are: (1) Advanced Subsonic Technology (AST) for future subsonic aircraft, (2) High Speed Research (HSR) for future supersonic commercial aircraft, (3) Rotorcraft noise control efforts, and (4) Weapons bay and other noise control applications for the military. Examples of good progress in the areas of jet, fan, airframe and helicopter noise as well as liner design and weapons bay noise suppression are provided herein. In the next few years we look forward to seeing major strides in noise reduction technology and our ability to predict situations of aeroacoustics interest.

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Community Noise and Vibration Sources

2020

Engineering Acoustics

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Highlights of Aeroacoustics Research in the U.S.—1998

Cited by 4 publications

References 12 publications

Edward J Rice and flow control studies for jets and shear layers at NASA Glenn Research Center

Edward J Rice and flow control studies for jets and shear layers at NASA Glenn Research Center

Recent Aeroacoustics Research in the United States

Community Noise and Vibration Sources

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