## Papers by FlowAirS fellows

M. Farooqui, W. Akl, and T. Elnady, “Sound attenuation in ducts using locally resonant periodic Aluminum patches”, *J. Acoust. Soc. Am. *(in press)

H. Ruiz, C. Claeys, E. Deckers, and W. Desmet, “Numerical and experimental study of the effect of microslits on the normal absorption of structural metamaterials,” *Mech. Syst. Signal Process.*, Oct. 2015. doi: 10.1016/j.ymssp.2015.09.028

C. F. Silva, T. Emmert, S. Jaensch, and W. Polifke, “Numerical study on intrinsic thermoacoustic instability of a laminar premixed flame,” *Combust. Flame*, vol. 162, no. 9, pp. 3370–3378, Sep. 2015. doi: 10.1016/j.combustflame.2015.06.003

M. Åbom and L. Du, “Sound amplification at T-junctions with merging mean flow,” *J. Acoust. Soc. Am.*, vol. 138, no. 3, p. 1769, Sep. 2015. doi: 10.1121/1.4933594

M. Farooqui, T. Elnady, R. Glav, and T. Karlsson, “Modeling and Characterization of a Novel Porous Metallic Foam Inside Ducts,” *SAE Int. J. Mater. Manf.*, vol. 8, no. 3, pp. 937–945, Jun. 2015. doi: 10.4271/2015-01-2203

R. Kabral, M. Åbom, and H. Boden, “Aeroacoustics research in Europe: the CEAS-ASC report on 2013 highlights,” *J. Sound Vib.*, vol. 340, pp. 39–60, Mar. 2015.

A. Alomar, D. Angland, X. Zhang, and N. Molin, “Experimental study of noise emitted by circular cylinders with large roughness,” *J. Sound Vib.*, vol. 333, no. 24, pp. 6474–6497, Dec. 2014. doi: 10.1016/j.jsv.2014.07.013

Y. Aurégan and D. K. Singh, “Experimental observation of a hydrodynamic mode in a flow duct with a porous material,” *J. Acoust. Soc. Am.*, vol. 136, no. 2, pp. 567–572, Aug. 2014. doi: 10.1121/1.4884768

D. K. Singh and S. W. Rienstra, “Nonlinear asymptotic impedance model for a Helmholtz resonator liner,” *J. Sound Vib.*, vol. 333, no. 15, pp. 3536–3549, Jul. 2014. doi: 10.1016/j.jsv.2014.03.013

R. Kabral, L. Du, M. Åbom, and M. Knutsson, “A Compact Silencer for the Control of Compressor Noise,” *SAE Int. J. Engines*, vol. 7, no. 3, pp. 1572–1578, Jun. 2014. doi: 10.4271/2014-01-2060

C. F. Silva, I. Durán, F. Nicoud, and S. Moreau, “Boundary Conditions for the Computation of Thermoacoustic Modes in Combustion Chambers,” *AIAA J.*, vol. 52, no. 6, pp. 1180–1193, Jun. 2014. doi: 10.2514/1.J052114

P. Jenny, J. S. Lee, D. Meyer, and H. Tchelepi, “Scale analysis of miscible density-driven convection in porous media,” *J. Fluid Mech.*, vol. 749, pp. 519–541, Jun. 2014. doi: 10.1017/jfm.2014.229

C. F. Silva, F. Nicoud, T. Schuller, D. Durox, and S. Candel, “Combining a Helmholtz solver with the flame describing function to assess combustion instability in a premixed swirled combustor,” *Combust. Flame*, vol. 160, no. 9, pp. 1743–1754, Sep. 2013. doi: 10.1016/j.combustflame.2013.03.020

## Conference proceedings

*VKI Lecture Series on Progress in simulation, control and reduction of ventilation noise in Rhode-St-Genèse, Belgium, 16-18 November 2015:*

C. Sovardi and W. Polifke, “CFD-Based Modelling of Sound Generation in Ducted Discontinuities,” in Proceedings of VKI Lecture Series on Progress in simulation, control and reduction of ventilation noise, Rhode-St-Genèse, 2015.

ASME 2015 Pressure Vessels & Piping division conference (PVP2015) in Boston, U.S.A., 19-23 July 2015:

F. Sanna, J. Golliard, and S. Belfroid, “On the effect of water film on flow-induced pulsations in closed side branches in tandem configuration,” in *Proceedings of the ASME 2015 Pressure Vessels & Piping Division Conference*, Boston, Massachusetts, U.S.A., 2015.

22nd International Congress on Sound and Vibration (ICSV22) in Florence, Italy, 12-16 July 2015:

C. F. Silva, S. Jaensch, T. Emmert, and W. Polifke, “On the autoregressive behavior of the intrinsic thermoacoustic feedback loop observed in pre-mixed flames,” in *Proceedings of the 22nd International Congress on Sound and Vibration (ICSV22)*, Florence, Italy, 2015.

H. Ruiz, C. Claeys, E. Deckers, and W. Desmet, “On the acoustic absorption of micro slitted metamaterials: a numerical and experimental study,” in *Proceedings of the 22nd International Congress on Sound and Vibration (ICSV22)*, Florence, Italy, 2015.

S. W. Rienstra and D. K. Singh, “Vortical Perturbations in Shear Flow, Scattered at a Hard Wall - Pressure Release Wall Transition,” in *Proceedings of the 22nd International Congress on Sound and Vibration (ICSV22)*, Florence, Italy, 2015.

K. Hamiche, H. Bériot, and G. Gabard, “Application of a high-order FEM solver to realistic aeroengine exhaust noise radiation,” in *Proceedings of the 22nd International Congress on Sound and Vibration (ICSV22)*, Florence, Italy, 2015.

21st AIAA/CEAS Aeroacoustics Conference (AIAA 2015) in Dallas, Texas, U.S.A., 22-26 June 2015:

K. Hamiche, G. Gabard, and H. Bériot, “Application of a stabilised High-Order Finite Element Model for solving the Linearised Euler Equations,” in *Proceedings of the 21st AIAA/CEAS Aeroacoustics Conference*, Dallas, Texas, U.S.A., 2015.

G. Grasso, J. Christophe, and C. Schram, “Prediction of low-speed fan trailing-edge noise based on RANS and on scale resolved simulations,” in *Proceedings of the 21st AIAA/CEAS Aeroacoustics Conference*, Dallas, Texas, U.S.A., 2015.

2nd Frontiers in Computational Physics Conference in Zurich, Switzerland, 3-5 June 2015:

P. Jenny, J. S. Lee, D. Meyer, and H. Tchelepi, “Large-scale simulation of miscible density-driven convection in porous media,” in *Proceedings of the 2nd Frontiers in Computational Physics Conference*, Zurich, Switzerland, 2015.

10th European Congress and Exposition on Noise Control Engineering (Euronoise 2015) in Maastricht, The Netherlands, 1-3 June 2015:

L. Xiong, W. Bi, and Y. Aurégan, “A reaction matrix method in waveguides with coupling resonances,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 2267-2272.

C. Sovardi and W. Polifke, “Acoustic characterisation of double-orifice configurations by means of an LES-SI approach,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 2237-2242.

D. K. Singh, “Non linear N wave source impedance model,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 279-283.

C. Sebastiani, C.-C. Hantschk, and H.-J. Kaltenbach, “Experimental Investigation on Acoustic Effects of Geometrical Modifications of Splitter Attenuators for Power Generation Systems,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 669-674.

K. Hamiche, G. Gabard, and H. Bériot, “Application of a high-order FEM solver to aeroengine exhaust noise radiation,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 2207-2212.

M. Farooqui, T. Elnady, and W. Akl, “Low Frequency Noise Attenuation inside Ducts using locally resonant periodic flush mounted Steel Patches,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 2255-2260.

H. Boden and R. Kabral, “The effect of high temperatures and grazing flow on the acoustic properties of liners,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 2261-2266.

A. Alomar and Y. Aurégan, “Liner Impedance Determination from PIV Acoustic Measurements,” in *Proceedings of Euronoise 2015*, Maastricht, The Netherlands, 2015, pp. 2231-2236.

International Conference on Fan Noise, Technology and Numerical Methods (Fan 2015) in Lyon, France, 15-17 April 2015:

G. Grasso, J. Christophe, and C. Schram, “Broadband Trailing-Edge Noise Prediction of a Four-Bladed Axial Fan using a Semi-Analytical Method,” in *Proceedings of Fan 2015*, Lyon, France, 2015.

M. Åbom and R. Kabral, “Turbocharger Noise - Generation and Control,” *SAE Technical Paper*, no. 2014–36–0802, Nov. 2014.

Deutsche Gesellschaft für Akustik (DEGA) Workshop Fahrzeugakustik /Strömungsakustik in Stuttgart, Germany, 7-8 Oct. 2014:

J. S. Lee and W. Polifke, “Untersuchung von Geräuschquellen im Fahrzeug-Kältekreislauf,” presented at the DEGA Workshop Fahrzeugakustik/Strömungsakustik, Stuttgart, Germany, 2014.

T. Emmert, S. Jaensch, C. Sovardi, and W. Polifke, “taX - a Flexible Tool for Low-Order Duct Acoustic Simulation in Time and Frequency Domain,” presented at the DEGA Workshop Fahrzeugakustik/Strömungsakustik, Stuttgart, Germany, 2014.

International Conference on Noise and Vibration Engineering (ISMA 2014) in Leuven, Belgium, 15-17 Sept. 2014 (incl. FlowAirS session on Computational and experimental aeroacoustics):

R. Kabral and M. Åbom, “Investigation of flow-acoustic interaction in automotive turbocharger,” in *Proceedings of the International Conference on Noise and Vibration Engineering (ISMA 2014)*, Leuven, Belgium, 2014, pp. 1327-1332.

K. Hamiche, G. Gabard, and H. Bériot, “A higher-order finite element method for the linearised Euler equations,” in *Proceedings of the International Conference on Noise and Vibration Engineering (ISMA 2014)*, Leuven, Belgium, 2014, pp. 1311-1326.

G. Grasso, J. Christophe, and C. Schram, “Numerical performance and accuracy of wake interaction noise prediction models,” in *Proceedings of the International Conference on Noise and Vibration Engineering (ISMA 2014)*, Leuven, Belgium, 2014, pp. 1297-1310.

A. Ammirati, H. Denayer, W. D. Roeck, and W. Desmet, “Validation of a time domain impedance formulation for the case of a 2D rectangular lined duct with a non-uniform mean-flow with a finite boundary layer thickness,” in *Proceedings of the International Conference on Noise and Vibration Engineering (ISMA 2014)*, Leuven, Belgium, 2014, pp. 1281-1290.

10th European Fluid Mechanics Conference (EFMC10) in Copenhagen, Denmark, 15-18 Sept. 2014:

S. Jaensch, T. Emmert, C. Sovardi, and W. Polifke, “Identification of Flame Transfer Functions in the Presence of Intrinsic Feedback and Noise,” presented at the 10th European Fluid Mechanics Conference (EFMC10), Copenhagen, Denmark, 2014.

7th Forum Acusticum (fa2014) in Krakow, Poland, 7-12 Sept. 2014:

T. Emmert, S. Jaensch, C. Sovardi, and W. Polifke, “taX - a Flexible Tool for Low-Order Duct Acoustic Simulation in Time and Frequency Domain,” in *Proceedings of the 7th Forum Acusticum*, Krakow, Poland, 2014.

L. Du and M. Åbom, “Using micro-perforated plates to realize a silencer based on the Cremer impedance,” in *Proceedings of the 7th Forum Acusticum*, Krakow, Poland, 2014.

ASME 2014 Pressure Vessels & Piping division conference (PVP2014) in Anaheim, U.S.A., 20-24 July 2014:

F. Sanna and J. Golliard, “Flow-Induced Pulsations in Closed Side Branches With Wet Gas,” in *Proceedings of the ASME 2014 Pressure Vessels and Piping Conference*, vol. 4: Fluid-Structure Interaction, Anaheim, California, U.S.A., 2014. doi: 10.1115/PVP2014-28433

21st International Congress on Sound and Vibration (ICSV21) in Beijing, China, 13-17 July 2014:

C. Sovardi, S. Jaensch, C. F. Silva, and W. Polifke, “Identification of sound sources in internal ducted flows: a large eddy simulation-system identification approach,” in *Proceedings of the 21st International Congress on Sound and Vibration (ICSV21)*, Beijing, China, 2014.

Center of Turbulence Research Summer Program 2014 in Stanford, California, U.S.A., 6 July-1 Aug. 2014:

C. F. Silva, W. Polifke, J. O’Brian, and M. Ihme, “Towards concurrent identification of flame dynamics and combustion noise of enclosed flames,” in *Proceedings of the Center of Turbulence Research Summer Program 2014*, Stanford, California, U.S.A., 2014, pp. 179-188.

20th AIAA/CEAS Aeroacoustics Conference (AIAA 2014) in Atlanta, U.S.A., 16-20 June 2014:

F. Sanna and J. Golliard, “Effect of water-droplets on flow-induced pulsations in pipe with two closed-side branches: an experimental study,” in *Proceedings of the 20th AIAA/CEAS Aeroacoustics Conference*, Atlanta, U.S.A., 2014. doi: 10.2514/6.2014-3192

S. W. Rienstra and D. K. Singh, “Hard wall-soft wall-vorticity scattering in shear flow,” in *Proceedings of the 20th AIAA/CEAS Aeroacoustics Conference*, Atlanta, U.S.A., 2014. doi: 10.2514/6.2014-3350

U. Karban, G. Ogus, K. Kucukcoskun, C. Schram, C. Sovardi, and W. Polifke, “Noise Produced by a Tandem Diaphragm: Experimental and Numerical Investigations,” in *Proceedings of the 20th AIAA/CEAS Aeroacoustics Conference*, Atlanta, U.S.A., 2014. doi: 10.2514/6.2014-3225

R. Kabral, H. Boden, and T. Elnady, “Determination of Liner Impedance under High Temperature and Grazing Flow Conditions,” in *Proceedings of the 20th AIAA/CEAS Aeroacoustics Conference*, Atlanta, U.S.A., 2014. doi: 10.2514/6.2014-2956

G. Grasso, J. Christophe, C. Schram, and T. Verstraete, “Influence of the noise prediction model on the aeroacoustic optimization of a contra-rotating fan,” in *Proceedings of the 20th AIAA/CEAS Aeroacoustics Conference*, Atlanta, U.S.A., 2014. doi: 10.2514/6.2014-2611

9th International Danube Adria Association for Automation & Manufacturing (DAAAM) Baltic Conference “Industrial Engineering” in Tallinn, Estonia, 24-26 April 2014:

R. Kabral, F. Auriemma, M. Knutsson, and M. Åbom, “A new type of compact silencer for high frequency noise,” in *Proceedings of the 9th International DAAAM Baltic Conference “Industrial Engineering,”* Tallinn, Estonia, 2014, pp. 29–35.

12th *Congrès Français d’Acoustique* (CFA) in Poitiers, France, 22-25 April 2014:

Y. Aurégan and L. Xiong, “Propagation acoustique avec écoulement avec un traitement acoustique de faible résistance,” in *Proceedings of the 12th Congrès Français d’Acoustique (CFA)*, Poitiers, France, 2014.

14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-15) in Honolulu, Hawaï, U.S.A., 24-28 Feb. 2014:

G. Grasso, J. Christophe, C. Schram, and T. Verstraete, “Aerodynamic, aeroacoustic and structural optimization of a contra-rotating fan,” in *Proceedings of ISROMAC-15*, Honolulu, Hawaï, U.S.A., 2014.

Deutsche Gesellschaft für Luft- und Raumfahrt (DGLR) / Deutsche Gesellschaft für Akustik (DEGA) X-Noise Workshop Strömungsakustik in Munich, Germany, 20-21 Nov. 2013:

C. Sovardi and W. Polifke, “Identification of Sound sources in internal non-reactive turbulent flows,” presented at the DGLR/DEGA X-Noise Workshop Strömungsakustik, Munich, Germany, 2013.

Sonderforschungsbereich/Transregio 40 Summer Program in Garching, Germany, Aug. 2013:

C. Sovardi, S. Jaensch, K. Förner, F. Selimefendigil, and W. Polifke, “Parametric vs. Nonparametric Identification of Nonlinear Acoustic Scattering at Duct Discontinuities based on LES data,” in *Proceedings of the Summer School Program SFB TRR40*, Garching, Germany, 2013.

2nd International Conference on Phononic Crystals/Metamaterials, Phonon Transport and Optomechanics (PHONONICS 2013) in Sharm El-Sheikh, Egypt, 2-7 June 2013:

M. Farooqui, T. Elnady, and W. Akl, “Sound Attenuation in Ducts using Locally Resonant Periodic Flush Mounted Flexible Silicon Patches,” in *Proceedings of Phononics 2013*, Sharm El-Sheikh, Egypt, 2013.

19th AIAA/CEAS Aeroacoustics Conference (AIAA 2013) in Berlin, Germany, 27-29 May 2013:

D. K. Singh and S. W. Rienstra, “A systematic impedance model for non-linear Helmholtz resonator liner,” in *Proceedings of the 19th AIAA/CEAS Aeroacoustics Conference*, Berlin, Germany, 2013. doi: 10.2514/6.2013-2223

Y. Aurégan, L. Xiong, and W. Bi, “Acoustical behaviour of purely reacting liners,” in *Proceedings of the 19th AIAA/CEAS Aeroacoustics Conference*, Berlin, Germany, 2013. doi: 10.2514/6.2013-2077

Euromech 546 colloquium on Combustion Dynamics and Combustion Noise in Menaggio, Italy, 13-17 May 2013:

C. F. Silva, S. Föller, T. Emmert, A. Ulhaq, and W. Polifke, “Signal Generation and its Influence on the Concurrent Identification of Flame Transfer Function and Combustion Noise,” presented at the Euromech Colloquium 546, Menaggio, Italy, 2013.

SAE 2013 Noise and Vibration Conference and Exhibition in Grand Rapids, U.S.A., 20-23 May 2013:

R. Kabral, H. Rammal, and M. Åbom, “Acoustical Methods for Investigating Turbocharger Flow Instabilities,” in *SAE Technical Paper*, Grand Rapids, U.S.A., 2013. doi: 10.4271/2013-01-1879

SAE 2012 Small Engine Technology Conference & Exhibition in Madison, Wisconsin, U.S.A., 16-18 Oct. 2012:

R. Kabral, H. Rämmal, and J. Lavrentjev, “Acoustic Studies of Micro-Perforates for Small Engine Silencers,” in *SAE Technical Paper*, Madison, Wisconsin, U.S.A., 2012. doi: 10.4271/2012-32-0107

R. Kabral, H. Rämmal, F. Auriemma, J. Luppin, R. Koiv, H. Tiikoja, and J. Lavrentjev, “A Novel Design for Cruiser Type Motorcycle Silencer Based on Micro-Perforated Elements,” in *SAE Technical Paper*, Madison, Wisconsin, U.S.A., 2012. doi: 10.4271/2012-32-0109

R. Kabral, H. Rämmmal, J. Lavrentjev, and F. Auriemma, “Acoustic Studies on Small Engine Silencer Elements,” *SAE Technical Paper*, no. 2011–32–0514, Nov. 2011. doi: 10.4271/2011-32-0514