nach oben

Experiments in Fluids

Erschienen in:

01.02.2010 | Research Article

Measurement of the noise generation at the trailing edge of porous airfoils

verfasst von: T. Geyer, E. Sarradj, C. Fritzsche

Erschienen in: Experiments in Fluids | Ausgabe 2/2010

Einloggen

Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.

search-config

KI-gestützte Suche

Aus

Abstract

Owls are commonly known for their quiet flight, enabled by three adaptions of their wings and plumage: leading edge serrations, trailing edge fringes and a soft and elastic downy upper surface of the feathers. In order to gain a better understanding of the aeroacoustic effects of the third property that is equivalent to an increased permeability of the plumage to air, an experimental survey on a set of airfoils made of different porous materials was carried out. Several airfoils with the same shape and size but made of different porous materials characterized by their flow resistivities and one non-porous reference airfoil were subject to the flow in an aeroacoustic open jet wind tunnel. The flow speed has been varied between approximately 25 and 50 m/s. The geometric angle of attack ranged from −16° to 20° in 4°-steps. The results of the aeroacoustic measurements, made with a 56-microphone array positioned out of flow, and of the measurements of lift and drag are given and discussed.

Vorheriger Artikel Flow field measurements in an optically accessible, direct-injection spray-guided internal combustion engine using high-speed PIV

Nächster Artikel Axial plus tangential entry swirling jet

Sie haben noch keine Lizenz? Dann Informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

über 102.000 Bücher
über 537 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Finance + Banking
Management + Führung
Marketing + Vertrieb
Maschinenbau + Werkstoffe
Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Jetzt informieren

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

über 67.000 Bücher
über 390 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Maschinenbau + Werkstoffe

Jetzt Wissensvorsprung sichern!

Jetzt informieren

Amiet RK (1976) Noise due to turbulent flow past a trailing edge. J Sound Vib 3(47):387–393CrossRef

Amiet R (1978) Refraction of sound by a shear layer. J Sound Vib 58:467–482MATHCrossRef

Bachmann T, Klän S, Baumgartner W, Klaas M, Schröder W, Wagner H (2007) Morphometric characterization of wing feathers of the barn owl Tyto alba pratincola and the pigeon Columba livia. Front Zool 4:23CrossRef

Blake WK (1986) Mechanics of flow-induced sound and vibration, volume II: complex flow-structure interactions. Academic Press Inc, Orlando, pp 721–724MATH

Brooks TF, Hodgson TH (1981) Trailing edge noise prediction from measured surface pressures. J Sound Vib 78:69–117CrossRef

Brooks TF, Humphreys WM (2004) A deconvolution approach for the mapping of acoustic sources (DAMAS) determined from phased microphone arrays, AIAA-2004-2954, 10th AIAA/CEAS aeroacoustics conference

Brooks TF, Marcolini MA. Pope DS (1984) Airfoil trailing edge flow measurements and comparison with theorie incorporating open wind tunnel corrections, AIAA-84-2266. AIAA/NASA 9th aeroacoustics conference

Brooks TF, Marcolini MA, Pope DS (1986) Airfoil trailing-edge flow measurements. AIAA J 24:1245–1251CrossRef

Brooks TF, Pope DS, Marcolini MA (1989) Airfoil self-noise and prediction. NASA RP-1218, Hampton

Drela M (1989) XFOIL: an analysis and design system for low reynolds number airfoils, conference on low reynolds number aerodynamics. University of Notre Dame, Notre Dame

Ffowcs Williams JE, Hall LH (1970) Aerodynamic sound generation by turbulent flow in the vicinity of a scattering half plane. J Fluid Mech 40(4):657–670MATHCrossRef

Fink MR, Bailey DA (1980) Airframe noise reduction studies and clean-airframe noise investigation, NASA Contractor Report 159311

Geyer T, Sarradj E, Fritzsche C (2009) Porous airfoils: noise reduction and boundary layer effects, 15th AIAA/CEAS aeroacoustics conference, AIAA paper 2009-3392

Glauert H (1983) The elements of aerofoil and airscrew theory, 2 edn. Cambridge University Press, New York

Graham RR (1934) The silent flight of owls. J Roy Aeronaut Soc 286:837–843

Graham JMR (1976) Turbulent flow past a porous plate. J Fluid Mech 73(3):565–591MATHCrossRef

Grosveld FW (1985) Prediction of broadband noise from horizontal axis wind turbines. J Propulsion 1:292–299CrossRef

Herr M (2007) A noise reduction study on flow-permeable trailing-edges. Deutsches Zentrum fr Luft-und Raumfahrt (DLR), Institute of Aerodynamics and Flow Technology

Herr M (2007) Design criteria for low-noise trailing-edges, 13th AIAA/CEAS aeroacoustics conference, AIAA paper 2007-3470

Hersh AS, Soderman PT, Hayden RE (1974) Investigation of acoustic effects of leading edge serrations on airfoils. J Aircr 11:197–202CrossRef

Howe MS (1978) A review of the theory of trailing edge noise. J Sound Vib 3(61):437–465CrossRef

Howe MS (1979) On the added mass of a perforated shell, with application to the generation of aerodynamic sound by a perforated trailing edge. Proc R Soc Lond A 365:209–233MATHCrossRef

Howe MS (1988) The influence of surface rounding on trailing edge noise. J Sound Vib 126(3):503–523CrossRefMathSciNet

Howe MS (1991) Aerodynamic noise of a serrated trailing edge. J Fluids Struct 5:33–45CrossRef

Howe MS (1991) Noise produced by a sawtooth trailing edge. J Acoust Soc Am 90(1):482–487CrossRef

Howe MS (1998) Acoustics of fluid structure interactions. Cambridge University Press, New YorkMATH

Hutcheson FV, Brooks TF (2004) Effects of angle of attack and velocity on trailing edge noise. 42nd AIA Aerospace sciences meeting, AIAA paper 2004-1031

Ikeda M, Takaishi T (2004) Perforated pantograph horn aeolian tone suppression mechanism. Q Rep Railway Tech Res Inst (RTRI) 45:169–174

ISO 9053: 1991 (1993) Acoustics—materials for acoustical applications—determination of airflow resistance, International organization for standardization

Knight M, Harris TA (1930) Experimental determination of jet boundary corrections for airfoil tests in four open wind tunnel jets of different shapes, NACA, Report No. 361

Kroeger RA, Gruschka HD, Helvey TC (1971) Low speed aerodynamics for ultra-quiet flight. AFFDL TR 971-75

Lee S (1994) Reduction of blade-vortex interaction noise through porous leading edge. AIAA J 32:3CrossRef

Lighthill MJ (1952) On sound generated aerodynamically, Proceedings of the royal society of london. Series A, Math Phys Sci 211:564–587MATHMathSciNetCrossRef

Lilley GM (1998) A study of the silent flight of the owl, AIAA Paper 1998-2340. 4th AIAA/CEAS aeroacoustics conference

Lowson MV (1992) Assessment and prediction of wind turbine noise, Flow solutions report 92/19

Lowson MV (1993) A new prediction model for wind turbine noise, conference on renewable energy, 17–19 Nov 1993, 177–182

Mechel FP (2002) Formulas of acoustics, porous absorbers. Springer, Berlin, pp 272–324

Mineck RE, Hartwich PM (1996) Effect of full-chord porosity on aerodynamic characteristics of the NACA 0012 airfoil, NASA technical paper 3591

Moreau S, Iaccarino G, Roger M, Wang M (2001) CFD analysis of flow in an open-jet aeroacoustic experiment, center for turbulence research, annual research briefs, 343–351

Moriarty P (2005) NAFNoise user guide. National Wind Technology Center, Golden

Mueller TJ (2002) Aeroacoustic measurements. Springer, Berlin

Nagamatsu HT, Orozco RD, Ling DC (1984) Porosity effect on supercritical airfoil drag reduction by shock wave/boundary layer control, AIAA-84-1682, AIAA 17th Fluid dynamics, plasma dynamics, and lasers conference

Nelson PA (1982) Noise generated by flow over perforated surfaces. J Sound Vib 83:11–26CrossRef

Neuhaus W, Bretting H, Schweizer B (1973) Morphologische und funktionelle Untersuchungen über den ’lautlosen’ Flug der Eulen (Strix aluco) im Vergleich zum Flug der Enten (Anas platyrhynchos). Biologisches Zentralblatt 92:495–512

Oerlemans S (2004) Wind tunnel aeroacoustic tests of six airfoils for use on small wind turbines, Subcontractor report NREL/SR-500-35339, National Renewable Energy Laboratory

Oerlemans S, Migliore P (2004) Aeroacoustic wind tunnel tests of wind turbine airfoils. AIAA J 3042

Revell J, Kuntz H, Balena F, Horne W, Storms B, Dougherty R (1997) Trailing edge flap noise reduction by porous acoustic treatment, 3rd AIAA/CEAS aeroacoustics conference, AIAA paper 97-1646-CP

Sarradj E (2008) Quantitative source spectra from acoustic array measurements. Berlin beamforming conference (BeBeC)

Sarradj E, Geyer T (2007) Noise generation by porous airfoils, 13th AIAA/CEAS aeroacoustics conference, AIAA paper 2007-3719

Sarradj E, Fritzsche C, Geyer T, Giesler J (2009) Acoustic and aerodynamic design and characterization of a small-scale aeroacoustic wind tunnel. Appl Acoust 70:1073–1080CrossRef

Savu G, Trifu O (1984) Porous airfoils in transonic flow. AIAA J 22(7):989–991CrossRef

Scheidegger AE (1974) The physics of flow through porous media, 3 edn. University of Toronto Press, Toronto

Schulz-Hausmann FKv (1985) Wechselwirkung ebener Freistrahlen mit der Umgebung, Fortschrittberichte VDI, 7: Strömungstechnik

Selig MS, Donovan JF, Fraser DB (1989) Airfoils at low speeds. Soartech 8

Shannon D, Morris SC (2008) Trailing edge noise measurements using a large aperture phased array. J Aeroacoustics 7:147–176CrossRef

Sijtsma P (2007) CLEAN based on spatial source coherence, AIAA-2007-3436, 13th AIAA/CEAS aeroacoustics conference

Silverstein A, Katzoff S (1937) Experimental investigation of wind-tunnel interference on the downwash behind an airfoil, NACA, Report No. 609

Sueki T, Ikeda M, Takaishi T (2009) Aerodynamic noise reduction using porous materials and their application to high-speed pantographs. Q Rep Railway Tech Res Inst (RTRI) 50:26–31

Theodorsen T, Silverstein A (1934) Experimental verification of the theory of wind-tunnel boundary interference NACA, Report No. 478

Tinetti AF, Kelly JF, Bauer SXS, Thomas RH (2001) On the use of surface porosity to reduce unsteady lift, AIAA 2001-2921, 31st AIAA fluid dynamics conference and exibit

Tinetti AF, Kelly JF, Thomas RH, Bauer SXS (2002) Reduction of wake-stator interaction noise using passive porosity, AIAA 2002-1036, 40th AIAA aerospace sciences meeting and exibit

Tsui CY, Flandro GA (1977) Self-induced sound generation by flow over perforated duct liners. J Sound Vib 50:315–331CrossRef

Vr IL (1982) Perforated Baffles prevent flow-induced acoustic resonances in heat exchangers. Fortschritte der Akustik-FASE/DAGA

Yahathugoda I, Akishita S (2005) Experimental investigation on surface impedance effect of sound radiation from low mach number flow around a circular cylinder. Japan Soc Mech Eng (JSME) 48:342–349

Titel: Measurement of the noise generation at the trailing edge of porous airfoils
verfasst von: T. Geyer
E. Sarradj
C. Fritzsche
Publikationsdatum: 01.02.2010
Verlag: Springer-Verlag
Erschienen in: Experiments in Fluids / Ausgabe 2/2010
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-009-0739-x

Premium Partner

Marktübersichten

Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen.

Zur Marktübersicht

Springer Professional

Abstract

Bitte loggen Sie sich ein, um Zugang zu Ihrer Lizenz zu erhalten.

Sie haben noch keine Lizenz? Dann Informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Springer Professional "Technik"

Weitere Artikel der Ausgabe 2/2010

Flow field measurements in an optically accessible, direct-injection spray-guided internal combustion engine using high-speed PIV

Distance effect on the behavior of an impinging swirling jet by PIV and flow visualizations

Measurements of an unsteady liquid metal flow during spin-up driven by a rotating magnetic field

Density and compressibility effects in turbulent subsonic jets part 1: mean velocity field

Axial plus tangential entry swirling jet

Optimization of multiplane μPIV for wall shear stress and wall topography characterization

Premium Partner

Marktübersichten