Prediction and control of trailing edge noise based on bionic airfoil
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Abstract
As a promising means, the passive porosity technology is used for the trailing-edge noise reduction of a bionic airfoil. The detailed two-dimensional Large Eddy Simulation is achieved to gain a better understanding of the prediction and passive control of trailing-edge noise source with the non-porous and porous treatment, respectively. The flow fields around the bionic airfoil indicate that the leading-edge separation causes both the noise contributors, i.e., the turbulent boundary layer and the vortex shedding. In addition, the effect of the porous trailing edge is substantiated in the distribution of the static pressure. The relevant noise also suggests a pronounced noise reduction potential in excess of 10 dB, but it has dependence on the flow resistivities. The two trailing-edge noise reduction mechanisms are characterized: (1) the suppression of the tonal vortex shedding noise; (2) the reduction of broadband turbulent boundary layer scattering noise. The findings may be used as reference in the design of silent aircraft.
Keywords
bionic airfoil porosity trailing-edge noise reduction vortex shedding turbulent boundary layerPreview
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References
- 1.Dobrzynski W, Nagakura K, Gehlhar B, et al. Airframe noise studies on wings with deployed high-lift devices, 1998. AIAA-98-2337Google Scholar
- 2.Macaraeg M G. Fundamental investigations of airframe noise, 1998. AIAA-98-2224Google Scholar
- 3.Takeda K, Ashcroft G B, Zhang X. Unsteady aerodynamics of slat cove flow in a high-lift device configuration, 2001. AIAA-2001-0706Google Scholar
- 4.Graham R R. The silent flight of owls. J R Aeronaut, 1934, 38: 837–843Google Scholar
- 5.Lilley G M. A study of the silent flight of the owl, 1998. AIAA-98-2340Google Scholar
- 6.Lilley G M. The Prediction of Airframe Noise and Comparison with Experiment. J Sound Vib, 2001, 239: 849–859CrossRefGoogle Scholar
- 7.Lockard D P, Lilley G M. The airframe noise reduction chanllenge. NASA/TM-2004-213013Google Scholar
- 8.Chen K, Liu Q P, Liao G H, et al. The sound suppression characteristics of wing feather of owl (Bubo bubo). J Bionic Eng, 2012, 9: 192–199Google Scholar
- 9.Vad J, Koscsó G, Gutermuth M, et al. Study of the aero-acoustic and aerodynamic effects of soft coating upon airfoil. JSME Int J Series C, 2007, 49: 648–656CrossRefGoogle Scholar
- 10.Herr M. New Results in Numerical and Experimental Fluid Mechanics V: Experimental Study on Noise Reduction through Trailing Edge Brushes. Berlin: Springer Press, 2006Google Scholar
- 11.Tinetti A F, Kelly J F, Bauer S X S, et al. On the use of surface porosity to reduce unsteady lift, 2001. AIAA-2001-2921Google Scholar
- 12.Tinetti A F, Kelly J F, Thomas R H, et al. Reduction of wake-stator interaction noise using passive porosity, 2002. AIAA-2002-1036Google Scholar
- 13.Sarradj E, Geyer T. Noise generation by porous airfoils, 2007. AIAA-2007-3719Google Scholar
- 14.Geyer T, Sarradj E, Fritzsche C. Porous airfoils: noise reduction and boundary layer effects, 2009. AIAA-2009-3392Google Scholar
- 15.Herr M. A noise reduction study on flow-permeable trailing edges. In: CD Proceedings ODAS 2007. 8th ONERA-DLR Aerospace Symposium (ODAS), 2007Google Scholar
- 16.Herr M. Design criteria for low-noise trailing-edges, 2007. AIAA-2007-3470Google Scholar
- 17.Sueki T, Ikeda M, Takaishi T. Aerodynamic noise reduction using porous materials and their application to high-speed pantographs. Q Rep Railway Tech Res Inst (RTRI), 2009, 50:26–31Google Scholar
- 18.Marsden A L, Wang M, Dennis J E, et al. Trailing-edge noise reduction using derivative-free optimization and large-eddy simulation. J Fluid Mech, 2007, 572: 13–36CrossRefMATHMathSciNetGoogle Scholar
- 19.Lai H, Luo K. A conceptual study of cavity aeroacoustics control using porous media inserts. Flow Turbul Combust, 2008, 80: 375–391CrossRefMATHGoogle Scholar
- 20.Bruneau C H, Mortazavi I. Numerical modeling and passive flow control using porous media. Comput Fluids, 2008, 37: 488–498CrossRefMATHGoogle Scholar
- 21.Frink N, Bonhaus D, Vatsa V, et al. A boundary condition for simulation of flow over porous surfaces, 2001. AIAA-2001-2412Google Scholar
- 22.Khorrami M R, Li F, Choudhari M. Novel approach for reducing rotor tip clearance-induced noise in turbofan engines, 2002. 40: 1518–1528Google Scholar
- 23.Khorrami M R, Li F, Choudhari M. Application of passive porous treatment to slat trailing edge noise. NASA/TM-2003-212416Google Scholar
- 24.Liu T S, Kuykendoll K, Rhew R, et al. Avian wing geometry and kinematics. AIAA J, 2006, 44: 954–963CrossRefGoogle Scholar
- 25.Klan S, Bachmann T, Klaas M, et al. Experimental analysis of the flow field over a novel owl based airfoil. Exp Fluids. 2009, 46: 975–989CrossRefGoogle Scholar
- 26.Ge C J, Ren L Q, Liang P, et al. High-lift effect of bionic slat based on owl wing. J Bionic Eng, 2013, 10: 456–463Google Scholar
- 27.Geyer T, sarradj E, Fritzsche C. Measurement of the noise generation at the trailing edge of porous airfoils. Exp Fluids, 2010, 48: 291–308CrossRefGoogle Scholar
- 28.Arcondoulis E, Doolan C, Zander A, et al. On the generation of airfoil tonal noise at zero angle of attack and low to moderate Reynolds number, 2012. AIAA-2012-2060Google Scholar
- 29.Arcondoulis E, Doolan C, Zander A, et al. A review of trailing edge noise generated by airfoils at low to moderate reynolds number. Acoust Aust, 2010, 38: 129–133Google Scholar
- 30.Herr M, Dobrzynski W. Experimental investigation in low-noise trailing edge design, AIAA J, 2005, 43: 1167–1175CrossRefGoogle Scholar
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