Ultra-high bypass ratio (UHBR) engines are designed as compact as possible and are characterized by a short asymmetric air inlet and heterogeneous outlet guide vanes (OGVs). The flow close to the fan is therefore circumferentially nonuniform (or distorted) and the resulting noise might be impacted. This is studied here at take-off conditions by means of a simulation of the unsteady Reynolds-averaged Navier–Stokes (URANS) equations of a full-annulus fan stage. The model includes an asymmetric air inlet, a fan, heterogeneous OGVs, and homogeneous inlet guide vanes (IGVs). Direct acoustic predictions are given for both inlet and aft noises. A novel hydrodynamic/acoustic splitting method based on a modal decomposition is developed and is applied for the aft noise analysis. The noise mechanisms that are generally considered (i.e., interaction of fan-blade wakes with OGVs and fan self-noise) are shown to be impacted by the distortion. In addition, new sources caused by the interaction between the stationary distortion and the fan blades appear and contribute to the inlet noise.
Issue Section:
Research Papers
References
References
1.
Peake
, N.
Parry
, A. B.
2012
, “Modern Challenges Facing Turbomachinery Aeroacoustics
,” Annu. Rev. Fluid Mech.
, 44
(1
), pp. 227
–248
.2.
De Laborderie
, J.
Moreau
, S.
2016
, “Prediction of Tonal Ducted Fan Noise
,” J. Sound Vib.
, 372
, pp. 105
–132
.3.
Envia
, E.
Wilson
, A. G.
Huff
, D. L.
2004
, “Fan Noise: A Challenge to CAA
,” Int. J. Comput. Fluid Dyn.
, 18
(6
), pp. 471
–480
.4.
Holewa
, A.
Weckmüller
, C.
Guérin
, S.
2014
, “Impact of Bypass Duct Bifurcations on Fan Noise
,” J. Propul. Power
, 30
(1
), pp. 143
–152
.5.
Bonneau
, V.
Polacsek
, C.
Barrier
, R.
Lewy
, S.
Roux
, J. M.
Gervais
, Y.
2015
, “Tonal Noise Prediction of a Turbofan With Heterogeneous Stator and Bifurcations
,” AIAA J.
, 53
(11
), pp. 3354
–3369
.6.
Roger
, M.
Caule
, P.
2014
, “Assessment of the Effect of Stator Inhomogeneity on Rotor-Stator Tonal Noise
,” 15th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery
, Honolulu, HI, Feb. 24–28, Paper No. 209.7.
Oishi
, T.
Kusuda
, S.
Kodama
, H.
Namba
, M.
Kazawa
, J.
2013
, “Behaviors of Fan Tone Noise Under the Influence of Circumferentially Non-Uniform Steady Pressure Perturbation
,” AIAA
Paper No. 2013-2293.8.
Sturm
, M.
Sanjosé
, M.
Moreau
, S.
Carolus
, T.
2015
, “Application of Analytical Noise Models Using Numerical and Experimental Fan Data
,” 11th European Conference on Turbomachinery, Fluid Dynamics and Thermodynamics
, Madrid, Spain, Mar. 23–27, Paper No. 2015-241.https://www.researchgate.net/publication/281962321_Application_of_analytical_noise_models_using_numerical_and_experimental_fan_data9.
Conte
, F.
Roger
, M.
Moreau
, S.
Sanjosé
, M.
Caule
, P.
2011
, “Modeling of Installation Effects on the Noise From Subsonic Axial Fans
,” AIAA
Paper No. 2011-2948.10.
Winkler
, J.
Reimann
, C. A.
Reba
, R. A.
Gilson
, J.
2014
, “Turbofan Inlet Distortion Noise Prediction With a Hybrid CFD-CAA Approach
,” AIAA
Paper No. 2014-3102.11.
Doherty
, M.
Namgoong
, H.
2016
, “Impact of Turbofan Intake Distortion on Fan Noise Propagation and Generation
,” AIAA
Paper No. 2016-2841.12.
Sanjosé
, M.
Moreau
, S.
Pestana
, M.
Roger
, M.
2017
, “Effect of Weak Outlet-Guide-Vane Heterogeneity on Rotor Stator Tonal Noise
,” AIAA J.
, 55
(10
), pp. 3440
–3457
.13.
Winkler
, J.
Reimann
, C. A.
Gumke
, C. D.
Ali
, A. A.
Reba
, R. A.
2017
, “Inlet and Aft Tonal Noise Predictions of a Full-Scale Turbofan Engine With Bifurcation and Inlet Distortion
,” AIAA
Paper No. 2017-3034.14.
Daroukh
, M.
Moreau
, S.
Gourdain
, N.
Boussuge
, J. F.
Sensiau
, C.
2017
, “Effect of Distortion on Turbofan Tonal Noise at Cutback With Hybrid Methods
,” Int. J. Turbomach., Propul. Power
, 2
(3
), p. 16
.15.
Daroukh
, M.
Gourdain
, N.
Moreau
, S.
Boussuge
, J. F.
Sensiau
, C.
2017
, “Impact of Inlet Distortion on Fan Tonal Noise
,” 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics
, Stockholm, Sweden, Apr. 3–7, Paper No. 2017-201.https://www.researchgate.net/publication/323819728_Impact_of_inlet_distortion_on_fan_tonal_noise16.
Goldstein
, M. E.
1976
, Aeroacoustics
, McGraw-Hill
, New York.17.
Cantrell
, R. H.
Hart
, R. W.
1964
, “Interaction Between Sound and Flow in Acoustic Cavities: Mass, Momentum, and Energy Considerations
,” J. Acoust. Soc. Am.
, 36
(4
), pp. 697
–706
.18.
Lewy
, S.
Polacsek
, C.
Barrier
, R.
2014
, “Analytical and Numerical Prediction of Harmonic Sound Power in the Inlet of Aero-Engines With Emphasis on Transonic Rotation Speeds
,” J. Sound Vib.
, 333
(26
), pp. 7165
–7182
.19.
Cambier
, L.
Heib
, S.
Plot
, S.
2013
, “The ONERA elsA CFD Software: Input From Research and Feedback From Industry
,” Mech. Ind.
, 14
(3
), pp. 159
–174
.20.
Wilcox
, D. C.
1988
, “Reassessment of the Scale-Determining Equation for Advanced Turbulence Models
,” AIAA J.
, 26
(11
), pp. 1299
–1310
.21.
Roe
, P. L.
1981
, “Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes
,” J. Comput. Phys.
, 43
(2
), pp. 357
–372
.22.
van Leer
, B.
1979
, “Towards the Ultimate Conservative Difference Scheme V: A Second Order Sequel to Godunov' Method
,” J. Comput. Phys.
, 32
(1
), pp. 101
–136
.23.
Daroukh
, M.
2017
, “Effects of Distortion on Modern Turbofan Tonal Noise
,” Ph.D. thesis, INP Toulouse/University of Sherbrooke, Toulouse, France/Sherbrooke, QC, Canada.24.
Antares Development Team
, 2012–2017
, “Antares Documentation Release 1.9.0,” Antares Development Team, accessed Dec. 21, 2018, https://cerfacs.fr/antares/25.
Schmid
, P. J.
2010
, “Dynamic Mode Decomposition of Numerical and Experimental Data
,” J. Fluid Mech.
, 656
, pp. 5
–28
.26.
Ovenden
, N.
Rienstra
, S.
Hirschberg
, A.
2004
, “Mode-Matching Strategies in Slowly Varying Engine Ducts
,” AIAA J.
, 42
(9
), pp. 1832
–1840
.27.
Rienstra
, S. W.
Hirschberg
, A.
2016
, An Introduction to Acoustics
, Technische Universiteit Eindhoven
, Eindhoven, The Netherlands.28.
Redonnet
, S.
Druon
, Y.
2012
, “Computational Aeroacoustics of Aft Fan Noises Characterizing a Realistic Coaxial Engine
,” AIAA J.
, 50
(5
), pp. 1029
–1046
.29.
Tyler
, J. M.
Sofrin
, T. G.
1962
, “Axial Flow Compressor Noise Studies
,” Soc. Automot. Eng. Trans.
, 70
, pp. 309
–332
.30.
Masson
, V.
Posson
, H.
Sanjosé
, M.
Moreau
, S.
Roger
, M.
2016
, “Fan-OGV Interaction Broadband Noise Prediction in a Rigid Annular Duct With Swirling and Sheared Mean Flow
,” AIAA
Paper No. 2016-2944.31.
Smith
, A. F.
Ovenden
, N. C.
Bowles
, R. I.
2012
, “Flow and Geometry Induced Scattering of High Frequency Acoustic Duct Modes
,” Wave Motion
, 49
(1
), pp. 109
–124
.32.
Astley
, R. J.
Sugimoto
, R.
Gabard
, G.
Norde
, E.
Grift
, E. J.
Bocquier
, M.
2014
, “The Effect of Steady Flow Distortion on Mode Propagation in Turbofan Intake
,” AIAA
Paper No. 2014-3113.Copyright © 2019 by ASME
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