2 edition of Airframe noise component interaction studies found in the catalog.
Airframe noise component interaction studies
Martin R Fink
by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Technical Information Service in [Washington], Springfield, Va
Written in English
|Statement||Martin R. Fink and Robert H. Schlinker, United Technologies Research Center|
|Series||NASA contractor report ; NASA CR-3110, NASA contractor report -- NASA CR-3110|
|Contributions||Schlinker, Robert H., joint author, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office, Langley Research Center, United Technologies Research Center|
|The Physical Object|
|Pagination||iv, 134 p. :|
|Number of Pages||134|
The Acoustic Research Measurement (ARM) flights, which concluded in May, at NASAs Armstrong Flight Research Center in California, tested technology to address airframe noise, or noise that is produced by non-propulsive parts of the aircraft, during landing. Jan 25, · Read "THE PREDICTION OF AIRFRAME NOISE AND COMPARISON WITH EXPERIMENT, Journal of Sound and Vibration" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The objectives of the BANC-IV Workshop are to: Provide a forum for a thorough assessment of simulation-based noise-prediction tools in the context of airframe configurations, including both near-field unsteady flow and the acoustic radiation generated via the interaction of this flow with solid surfaces. Engine noise, engine/airframe interference noise, and airframe noise are the main components of air-craft noise. The noise radiating from each component covers a diﬀerent fraction of the total noise at diﬀer-ent ﬂight regimes. At take oﬀ, the dominant noise source is the engine. However, the use of high-bypassCited by:
The circular cylinder with porous materials coating (PMC) is studied in detail to reveal the sensitivity of surface permeability to the flow control and noise reduction. Two-dimensional simulations were firstly used to identify the critical values of permeability and thickness. Parametric study results show that, there is a critical permeability value which produces the minimum force Cited by: 2. The airframe materials and structures effort currently plans full-scale component tests of a fuselage barrel section and the inboard wing box to validate the fuselage and wing structural designs, respectively (see Figure ). These tests are intended to develop confidence in proceeding from technology development to engineering and.
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Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.
Control strategies for aircraft airframe noise reduction. flap and slat side edges, landing gears, cavities, spoilers, component interaction noise and of detailed scale models important as the high frequencies are an important factor to the overall noise level.
12 Some studies have shown tonal noise due to Cited by: The Airframe Noise Reduction Challenge David P. Lockard Langley Research Center, Hampton, Virginia the airframe noise of an aircraft in this “clean” conﬁguration would only be about 8 dB quieter on approach than current civil transports.
To achieve the NASA goal of 10 dB noise reduction will require 3 Effect of Component Noise. Characterization of Unsteady Flow Structures Around Tandem Cylinders for Component Interaction Studies in Airframe Noise Conference Paper · May with 43 Reads How we measure 'reads'.
Airfrante Noise Reduction Studies and Clean-Airfrante Noise Investiglltion I M.R. Fink D.A. Bailey CONTRACT NASI APRIL Nl\51\ National Aeronautics and Space Administration ' Langley Research Center Airframe Component Model • Modified Trailing-Edge Flap.•.
Aeroacoustics of Low Mach Number Flows: Fundamentals, Analysis, and Measurement provides a comprehensive treatment of sound radiation from subsonic flow over moving surfaces, which is the most. Aircraft Airframe Noise and Installation Effects- Research Studies Leung CHOI CHOW, Pierre LEMPEREUR, Knut MAU The principal aircraft and engine manufacturers in Europe are facing increasing pressure to reduce aircraft noise solstemcell.com by: 1.
Almost 40 Years of Airframe Noise Research – What did we achieve. Werner Dobrzynski Airframe noise is generated through the interaction of turbulent Landing Gear Noise – Baseline WT-Studies B 1/16 scale MLG Baseline full scale or close to full scale LG tests.
The noise from such aeroplanes during approach is largely dominated by airframe noise, i.e. the noise generated by the interaction of flow and those aircraft components deployed for landing, such as the landing gears and the wing high-lift solstemcell.com: Werner Dobrzynski, Hanno Heller, Jan Delfs.
Aircraft noise pollution is a harmful noise effect produced by any aircraft or its components during the various phases of a flight. Sound production is divided into three categories: Mechanical noise—rotation of the engine parts, most noticeable when fan blades reach supersonic speeds.
Various papers on numerical methods for engine-airframe integration are presented. The individual topics considered include: scientific computing environment for the s, overview of prediction of complex turbulent flows, numerical solutions of the compressible Navier-Stokes equations, elements of.
ATAAC – An EU-Project Dedicated to Hybrid RANS/LES Methods. Authors; C.B.: Characterization of unsteady flow structures around tandem cylinders for component interaction studies in airframe noise. AIAA Paper An EU-Project Dedicated to Hybrid RANS/LES Methods.
In: Fu S., Haase W., Peng SH., Schwamborn D. (eds) Progress in Hybrid Cited by: Characterization of Unsteady Flow Structures Around Tandem Cylinders for Component Interaction Studies in Airframe Noise.
Unsteady Flowfield Around Tandem Cylinders as Prototype for Component Interaction in Airframe Noise. Mehdi Khorrami. AIRFRAME NOISE MODELING APPROPRIATE FOR MULTIDISCIPLINARY DESIGN AND OPTIMIZATION 42nd AIAA Aerospace Sciences Meeting and Exhibit Reno, NV, January 7, uTrailing Edge Noise – Airframe noise component Parametric Noise Metric Studies with NACA and NACA Cited by: Airframe Noise Sub-Component Definition and Model [Robert a.
Golub, Nasa Technical Reports Server (Ntrs), Et Al] on solstemcell.com *FREE* shipping on qualifying offers. Both in-house, and jointly with NASA under the Advanced Subsonic Transport (AST) program, Boeing Commerical Aircraft Company (BCA) had begun work on systematically identifying specific components of noise responsible for total Cited by: Visit solstemcell.com to get more information about this book, to buy it in print, or to download it as a free PDF.
moisture detector for nonconducting parts. There are many available references that specifically address application of these common NDE techniques to airframe structures. General.
Enter words / phrases / DOI / ISBN / keywords / authors / etc. Advanced search. 0 Cart. Numerical Study of Noise Shielding by Airframe Structures Changzheng Huang* and Dimitri Papamoschou† University of California, Irvine, CA ,USA This study is motivated by the development of ultra-quiet advent aircraft that use jet noise shielding by the airframe.
Current methods to predict shielding from aircraft surfacesCited by: 7. Flow separation, flow recirculation, an unsteady shear layer, and slat settings together generate noise of mainly broadband content.
For a flap, the outboard flap side edge and vortex system associated with it are the main sources of noise. The intensity of high lift device noise generally follows a. NOISE CONTROL ON AIRFRAME. Beside this, gear-wake flap interaction noise has been isolated from array measurements in the wind tunnel test data and could be identified in the far field, which is important for the assessment of the community noise near airports.
The FQUROH (Flight demonstration of QUiet technology to Reduce nOise from High-lift configurations) mission is intended to reduce airframe noise, a large fraction of which comes from high-lift devices (flap and slat) and landing gears, and to verify the feasibility of .Multidisciplinary Design Optimization of Low-Airframe-Noise Transport Aircraft Program (ANOPP).
Design studies are presented for cantilever wing and Strut-Braced Wing (SBW) transport aircraft with passengers and a 7, nm range. The results show that reducing airframe noise by reducing approach speed alone, will not provide sig-Cited by: Efficient and Airworthy Passive and Active Airframe Noise Control Strategies Michaela Herr could dominate the overall component noise which limits current.
prediction capability From the researcher’s standpoint the classical sources are much more.