Additively Manufactured Sound-Absorbing Porous Structures for Airfoil Trailing-Edge Noise Control
Publication: Journal of Aerospace Engineering
Volume 34, Issue 5
Abstract
This paper presents the results of experimental investigations on the sound absorption of two porous structures and the far-field noise performance of an airfoil employing sound-absorbing porous structures at the trailing edge. The porous structure consists of a microperforated housing with an air gap (PA structure) or an acoustic foam insert (PF structure). Sound absorption coefficients have been characterized using an impedance tube. Compared with a commercial acoustic foam, PF structures have shown a consistently higher (up to 0.5 higher) sound absorption coefficient over 0.5–6.4 kHz. Moreover, the frequency characteristics of PA and PF structures are predictable, which allows their geometric optimization to suit different applications. Far-field noise of airfoils has been measured using a 64-channel microphone array at various flow conditions. The sound-absorbing microtube structure is found to reduce the trailing-edge (TE) noise by up to approximately 12 dB at lower frequencies (1.5–6 kHz), while increasing high-frequency (over 6 kHz) noise levels due to the roughness elements of porous geometries and unsteady flow permeation. The peak frequency of noise reductions is found to not scale with the flow speed, but remains within a narrow frequency band at different flow conditions (, ). This is consistent with the narrow-band feature of microtube structures’ sound absorption, which indicates the contribution of sound absorption to TE noise reduction. The PF structure, due to its broadband sound absorption and tunable frequency characteristics, is considered a promising device for trailing-edge noise control.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge support from the Chinese Scholarship Council and the Australian Research Council.
References
ACARE (Advisory Council for Aeronautics Research in Europe). 2010. Aeronautics and air transport: Beyond vision 2020 (towards 2050). Brussels, Belgium: ACARE.
Ali, S. A. S., M. Azarpeyvand, and C. R. I. da Silva. 2018. “Trailing-edge flow and noise control using porous treatments.” J. Fluid Mech. 850 (Jul): 83–119. https://doi.org/10.1017/jfm.2018.430.
Barlow, J. B., W. H. Rae, and A. Pope. 1999. Low-speed wind tunnel testing. New York: Wiley.
Brooks, T., and W. Humphreys Jr. 1999. “Effect of directional array size on the measurement of airframe noise components.” In Proc., 5th AIAA/CEAS Aeroacoustics Conf. and Exhibit. Reston, VA: American Institute of Aeronautics and Astronautics.
Brooks, T. F., D. S. Pope, and M. A. Marcolini. 1989. Airfoil self-noise and prediction. Washington, DC: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division.
Carpio, A. R., F. Avallone, D. Ragni, M. Snellen, and S. van der Zwaag. 2019a. “Mechanisms of broadband noise generation on metal foam edges.” Phys. Fluids (1994) 31 (10): 105110. https://doi.org/10.1063/1.5121248.
Carpio, A. R., R. M. Martínez, F. Avallone, D. Ragni, M. Snellen, and S. van der Zwaag. 2019b. “Experimental characterization of the turbulent boundary layer over a porous trailing edge for noise abatement.” J. Sound Vib. 443 (Mar): 537–558. https://doi.org/10.1016/j.jsv.2018.12.010.
Chong, T. P., and A. Vathylakis. 2015. “On the aeroacoustic and flow structures developed on a flat plate with a serrated sawtooth trailing edge.” J. Sound Vib. 354 (Oct): 65–90. https://doi.org/10.1016/j.jsv.2015.05.019.
Chung, J., and D. Blaser. 1980. “Transfer function method of measuring in-duct acoustic properties. I. Theory.” J. Acoust. Soc. Am. 68 (3): 907–913. https://doi.org/10.1121/1.384778.
Clark, I. A., W. N. Alexander, W. Devenport, S. Glegg, J. W. Jaworski, C. Daly, and N. Peake. 2017. “Bioinspired trailing-edge noise control.” AIAA J. 55 (3): 740–754. https://doi.org/10.2514/1.J055243.
Crandall, I. B. 1926. Theory of vibrating systems and sound. New York: D. Van Nostrand Company.
Dassen, T., R. Parchen, J. Bruggeman, and F. Hagg. 1996. Results of a wind tunnel study on the reduction of airfoil self-noise by the application of serrated blade trailing edges. Amsterdam, Netherlands: Royal Netherlands Aerospace Centre.
Finez, A., M. Jacob, E. Jondeau, and M. Roger. 2010. “Broadband noise reduction with trailing edge brushes.” In Proc., 16th AIAA/CEAS Aeroacoustics Conf., 3980. Reston, VA: American Institute of Aeronautics and Astronautics.
Geyer, T., E. Sarradj, and C. Fritzsche. 2010a. “Measurement of the noise generation at the trailing edge of porous airfoils.” Exp. Fluids 48 (2): 291–308. https://doi.org/10.1007/s00348-009-0739-x.
Geyer, T., E. Sarradj, and C. Fritzsche. 2010b. “Porous airfoils: Noise reduction and boundary layer effects.” Int. J. Aeroacoust. 9 (6): 787–820. https://doi.org/10.1260/1475-472X.9.6.787.
Geyer, T. F., and E. Sarradj. 2014. “Trailing edge noise of partially porous airfoils.” In Proc., 20th AIAA/CEAS Aeroacoustics Conf., 3039. Reston, VA: American Institute of Aeronautics and Astronautics.
Goines, L., and L. Hagler. 2007. “Noise pollution: A modem plague.” South. Med. J. 100 (3): 287–294. https://doi.org/10.1097/SMJ.0b013e3180318be5.
Gruber, M. 2012. “Airfoil noise reduction by edge treatments.” Ph.D. thesis, Faculty of Engineering and the Environment, Institute of Sound and Vibration Research, Univ. of Southampton.
Gruber, M., P. Joseph, and M. Azarpeyvand. 2013. “An experimental investigation of novel trailing edge geometries on airfoil trailing edge noise reduction.” In Proc., 19th AIAA/CEAS Aeroacoustics Conf., 2011. Reston, VA: American Institute of Aeronautics and Astronautics.
Gruber, M., P. Joseph, and T. P. Chong. 2010. “Experimental investigation of airfoil self noise and turbulent wake reduction by the use of trailing edge serrations.” In Proc., 16th AIAA/CEAS Aeroacoustics Conf., 3803. Reston, VA: American Institute of Aeronautics and Astronautics.
Gruber, M., P. Joseph, and T. P. Chong. 2011. “On the mechanisms of serrated airfoil trailing edge noise reduction.” In Proc., 17th AIAA/CEAS Aeroacoustics Conf. (32nd AIAA Aeroacoustics Conf.), 2781. Reston, VA: American Institute of Aeronautics and Astronautics.
GWEC (Global Wind Energy Council). 2019. Global wind report 2018. Brussels, Belgium: GWEC.
Herr, M. 2007. “Design criteria for low-noise trailing-edges.” In Proc., 13th AIAA/CEAS Aeroacoustics Conf. (28th AIAA Aeroacoustics Conf.), 3470. Reston, VA: American Institute of Aeronautics and Astronautics.
Herr, M., and W. Dobrzynski. 2005. “Experimental investigations in low-noise trailing edge design.” AIAA J. 43 (6): 1167–1175. https://doi.org/10.2514/1.11101.
Herr, M., K.-S. Rossignol, J. Delfs, N. Lippitz, and M. Mößner. 2014. “Specification of porous materials for low-noise trailing-edge applications.” In Proc., 20th AIAA/CEAS Aeroacoustics Conf., 3041. Reston, VA: American Institute of Aeronautics and Astronautics.
Jiang, C., D. Moreau, and D. Doolan. 2017. Acoustic absorption of porous materials produced by additive manufacturing with varying geometrics. Toowong, QLD, Australia: Australian Acoustical Society.
Leon, A. C., F. Avallone, S. Pröbsting, and D. Ragni. 2016. “PIV investigation of the flow past solid and slitted sawtooth serrated trailing edges.” In Proc., 54th AIAA Aerospace Sciences Meeting, 1014. Reston, VA: American Institute of Aeronautics and Astronautics.
León, C. A., R. Merino-Martínez, S. Pröbsting, D. Ragni, and F. Avallone. 2018. “Acoustic emissions of semi-permeable trailing edge serrations.” Acoust. Aust. 46 (1): 111–117. https://doi.org/10.1007/s40857-017-0093-8.
León, C. A., R. Merino-Martínez, D. Ragni, F. Avallone, F. Scarano, S. Pröbsting, M. Snellen, D. G. Simons, and J. Madsen. 2017. “Effect of trailing edge serration-flow misalignment on airfoil noise emissions.” J. Sound Vib. 405 (Sep): 19–33. https://doi.org/10.1016/j.jsv.2017.05.035.
Leylekian, L., M. Lebrun, and P. Lempereur. 2014. “An overview of aircraft noise reduction technologies.” AerospaceLab 6 (7): 1.
Liu, Z., J. Zhan, M. Fard, and J. L. Davy. 2016. “Acoustic properties of a porous polycarbonate material produced by additive manufacturing.” Mater. Lett. 181 (Oct): 296–299. https://doi.org/10.1016/j.matlet.2016.06.045.
Maa, D.-Y. 1975. “Theory and design of microperforated panel sound-absorbing constructions.” Sci. Sin. 18 (1): 55–71.
Maa, D.-Y. 1987. “Microperforated-panel wideband absorbers.” Noise Control Eng. J. 29 (3): 77–84. https://doi.org/10.3397/1.2827694.
Maa, D.-Y. 1998. “Potential of microperforated panel absorber.” J. Acoust. Soc. Am. 104 (5): 2861–2866. https://doi.org/10.1121/1.423870.
Mechel, F. P. 2004. “Porous absorbers.” In Formulas of acoustics, 272–328. New York: Springer.
Moreau, D. J., and C. J. Doolan. 2013. “Noise-reduction mechanism of a flat-plate serrated trailing edge.” AIAA J. 51 (10): 2513–2522. https://doi.org/10.2514/1.J052436.
Mueller, T., C. Allen, W. Blake, R. Dougherty, D. Lynch, P. Soderman, and J. Underbrink. 2002. Aeroacoustic measurements. New York: Springer.
Oerlemans, S., P. Sijtsma, and B. M. López. 2007. “Location and quantification of noise sources on a wind turbine.” J. Sound Vib. 299 (4–5): 869–883. https://doi.org/10.1016/j.jsv.2006.07.032.
Prime, Z., C. Doolan, and B. Zajamsek. 2014. “Beamforming array optimisation and phase averaged sound source mapping on a model wind turbine.” In Vol. 249 of Proc., Inter-Noise and Noise-Con Congress and Conf., 1078–1086. Toowong, QLD, Australia: Australian Acoustical Society.
Rayleigh, J. W. S. B. 1896. Vol. 2 of The theory of sound. London: Macmillan.
Rossian, L., R. Ewert, and J. W. Delfs. 2020. “Numerical investigation of porous materials for trailing edge noise reduction.” Int. J. Aeroacoust. 19 (6–8): 347–364. https://doi.org/10.1177/1475472X20954410.
Sarradj, E., and T. Geyer. 2007. “Noise generation by porous airfoils.” In Proc., 13th AIAA/CEAS Aeroacoustics Conf. (28th AIAA Aeroacoustics Conf.), 3719. Reston, VA: American Institute of Aeronautics and Astronautics.
Schepers, J., et al. 2007. “Sirocco: Silent rotors by acoustic optimisation.” In Vol. 2021 of Proc., 2nd Int. Meeting on Wind Turbine Noise. Pittsfield, MA: National Wind Watch.
Teruna, C., F. Manegar, F. Avallone, D. Ragni, D. Casalino, and T. Carolus. 2020. “Noise reduction mechanisms of an open-cell metal-foam trailing edge.” J. Fluid Mech. 898 (Sep): A18. https://doi.org/10.1017/jfm.2020.363.
Vathylakis, A., T. P. Chong, and P. F. Joseph. 2015. “Poro-serrated trailing-edge devices for airfoil self-noise reduction.” AIAA J. 53 (11): 3379–3394. https://doi.org/10.2514/1.J053983.
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Received: Nov 30, 2020
Accepted: Apr 26, 2021
Published online: Jul 12, 2021
Published in print: Sep 1, 2021
Discussion open until: Dec 12, 2021
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