3 edition of Some aspects of the aeroacoustics of high-speed jets found in the catalog.
Some aspects of the aeroacoustics of high-speed jets
Lighthill, M. J. Sir.
by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va
Written in English
|Statement||Sir James Lighthill.|
|Series||ICASE report -- no. 93-20., NASA contractor report -- 191458., NASA contractor report -- NASA CR-191458.|
|Contributions||Langley Research Center.|
|The Physical Object|
International Journal of Aeroacoustics is a peer-reviewed journal publishing developments in all areas of fundamental and applied aeroacoustics. Fundamental topics include advances in understanding aeroacoustics phenomena; applied topics include all aspects of civil and military aircraft, automobile and high speed train aeroacoustics, and the impact of acoustics on structures. Rectangular supersonic jets exist widely in propulsion systems of aircrafts. When they are imperfectly expanded under certain conditions, the upstream traveling waves referred to as screech tones w.
Interest in the possibilities of using unconventional aerodynamic shapes such as waveriders and biplanes in the design of high-speed aircraft currently remains, as evidenced by, for example, recent developments [19,20,21,22]. The important aspect of creation and exploitation of high speed aerial transport is the care about ecology. Low and high speed subsonic jets have been studied in the last 50 years mainly due to their many applications in industry, such as the discharge of turbojets and turbofan engines. The purpose of this work is to investigate the aerodynamics and the acoustical noise generated by a single stream jet ﬂow operating at low Mach number
This is the definition given by Goldstein () in the introduction to his book entitled "Aeroacoustics" which is probably the only single text which brings the theoretical aspects of the subject together under one cover although there are many other texts on acoustics, fluid mechanics, flow induced sound, flow induced vibration, etc. which. This paper demonstrates an application of computational aeroacoustics to the prediction of noise generated by a round nozzle jet flow. In this study, the nozzle internal flow and the free jet flow outside are computed simultaneously by a high-order accurate, multi-block, large-eddy simulation (LES) code with overset grid capability.
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About this journal. International Journal of Aeroacoustics is a peer-reviewed journal publishing developments in all areas of fundamental and applied aeroacoustics. Fundamental topics include advances in understanding aeroacoustics phenomena; applied topics include all aspects of civil and military aircraft, automobile and high speed train aeroacoustics, and the impact of acoustics on.
Get this from a library. Some aspects of the aeroacoustics of high-speed jets. [M J Lighthill, Sir.; Langley Research Center.].
Some of the background to contemporary jet aeroacoustics is addressed. Then scaling laws for noise generation by low-Mach-number airflows and by turbulence convected at 'not so low' Mach number is reviewed.
These laws take into account the influence of Doppler effects associated with the convection of aeroacoustic sources.
Next, a uniformly valid Doppler-effect approximation exhibits the Cited by: Condition: Good. This is an ex-library book and may have the usual library/used-book markings book has soft covers. With usual stamps and markings, In good all round condition. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,grams, ISBN Seller Inventory # Some aspects of the aeroacoustics of high-speed jets.
By James Lighthill. Abstract. Some of the background to contemporary jet aeroacoustics is addressed. Then scaling laws for noise generation by low-Mach-number airflows and by turbulence convected at 'not so low' Mach number is reviewed. These laws take into account the influence of Doppler Author: James Lighthill.
Aeroacoustics, fan noise and control, duct acoustics, rotor noise: technical papers from AIAA 2nd Aero-acoustics Conference, Marchsubsequently. (Progress in astronautics and aeronautics) by Summerfield, M and a great selection of related books, art and.
Air traffic is growing at a steady rate of 3% to 5% per year in most regions of the world, implying a doubling every 15–25 years. This requires major advances in aircraft noise reduction at airports, just not to increase the noise exposure due to the larger number of aircraft movements.
In fact it can be expected, as a consequence of increased opposition to noise by near airport residents. The development of three-stream variable-cycle turbofan engines for tactical aircraft provides an opportunity for noise reduction by shaping the exhaust of the secondary and tertiary streams.
The paper reviews an experimental study of subscale three-stream jets operating at high specific thrust and issuing from rapid-prototyped nozzles. Exhaust conditions at four set points, with variable.  Seiner M. and Krejsa E.A., “ Supersonic Jet Noise and the High Speed Civil Transport,” AIAA PaperJuly Link Google Scholar  Aubert A.
and McKinley R., “ Measurements of Jet Noise Aboard US Navy Aircraft Carriers,” AIAA. Computational Aeroacoustics – Ganesh Raman – Google Books. Discover Prime Book Box for Kids. April 1, Language: I’d aerozcoustics to read this book on Kindle Don’t have a Kindle.
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The Best Books of Numerical investigation of high speed free shear flow instability and Mach wave radiation Alexey N.
The volume on Jet Aeroacoustics is both specific and broad in its coverage. Computational Aeroacoustics CAA deals with the simulation of sound generated by unsteady flows and is a rapidly growing area due to advances in.
Among the literature on acoustics the book of Pierce  is an excellent introduction available for a low price from the Acoustical Society of America.
In the preparation of the lecture notes we consulted various books which cover different aspects of the problem [14, 16, 18, 37, 48, 70, 87, 93, 99,]. Some aspects of the aeroacoustics of high-speed jets. Book. Jan ; Lennart Bengtsson. Some aspects of the aeroacoustics of high-speed jets.
Citing article. The results of these efforts were reported by Mendez et al. , Shoeybi , and Khalighi et al.
. This paper summarizes some highlights of the results from Mendez et al.  emphasizing the validation efforts undertaken.
Analysis of LES data to highlight specific aspects of jet noise generation are discussed afterwards. Instability waves have been established as the dominant source of mixing noise radiating into the downstream arc of a supersonic jet when the waves have phase velocities that are supersonic relative to ambient conditions.
Recent theories for supersonic jet noise have used the concepts of growing and decaying linear instability waves for predicting radiated noise. Jet Aeroacoustics is a growing area, a function of the significant projected growth in global air transportation. With the era of widespread supersonic flight and the proliferation of general aviation aircraft on future horizons, the noise generated by the high speed flow from aircraft engine exhaust is of great concern for communities near airports, for passengers in the aircraft’s cabin.
Computational aeroacoustics (CAA) deals with the prediction of an aerodynamic noise source and its propagation numerically with the help of time-dependent equations.
Some of the great books in this field are the book by Goldstein  and a recent book by Wagner et al. . Philip J Morris,"The Instability of High Speed Jets", International Journal of Aeroacoustics, 9, (1&2), pp.
Philip J Morris and K. Zaman,"Velocity measurements in jets with application to noise source modeling", Journal of Sound and Vibration,(4), pp. Aeroacoustics of Three-Stream High-Speed Jets research on high-speed jet noise was directed toward the develop-mentofthehigh-speedciviltransport(HSCT),asupersoniccommer- The HSCTeffort resulted in significant progress on the fundamental and applied aspects of.
Lighthill, “ Some aspects of the aeroacoustics of high speed jets,” NASA Contractors Report No. in the waveforms when larger waves take over the smaller. Figure 1(b) shows that the low amplitude waveform for crackle along with the high amplitude periodic clusters of screech are obvious due to the resonance feedback cyclic motion.
Some of the great books in this field are the book by Goldstein  and a recent book by Wagner et al. . nozzles for supersonic jet aeroacoustics predictions. Two simulations are.Full text of "The Acoustic Analogy: A Powerful Tool in Aeroacoustics with Emphasis on Jet Noise Prediction" See other formats The Acoustic Analogy - A Powerful Tool in Aeroacoustics with Emphasis on Jet Noise Prediction F.
Farassat*, Michael J. Doty^, and Craig A. Hunter"^ NASA Langley Research Center, Hampton, VA, The acoustic analogy introduced by Lighthill to study jet noise is now. Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all “ Acoustic pressure waveforms measured in high speed jet noise experiencing nonlinear propagation,” AIAA Paper No.
AIAA Some aspects of the aeroacoustics of high-speed jets.