Publications

 

Refereed Journals

Baars, W.J., Hutchins, N., Marusic, I. (2017) Self-similarity of wall-attached turbulence in boundary layers. J. Fluid Mech. 823, R2. doi: 10.1017/jfm.2017.357

Abbassi, M.R., Baars, W.J., Hutchins, N., Marusic, I. (2017) Skin-friction drag reduction in a high-Reynolds-number turbulent boundary layer via real-time control of large-scale structures. Int. J. Heat Fluid Flow, online. doi: 10.1016/j.ijheatfluidflow.2017.05.003

Baars, W.J., Hutchins, N., Marusic, I. (2017) Reynolds-number trend of hierarchies and scale interactions in turbulent boundary layers. Phil. Trans. R. Soc. A 375:20160077. doi: 10.1098/rsta.2016.0077

Squire, D.T., Baars, W.J., Hutchins, N., Marusic, I. (2016) Inner—outer interactions in rough-wall turbulence. J. Turbulence 17:12, 1159-1178. doi: 10.1080/14685248.2016.1235278

Baars, W.J., Hutchins, N., Marusic, I. (2016) Spectral stochastic estimation of high-Reynolds-number wall-bounded turbulence for a refined inner-outer interaction model. Phys. Rev. Fluids 1, 054406. doi: 10.1103/PhysRevFluids.1.054406 | data & scripts available

Baars, W.J., Tinney, C.E., Hamilton, M.F. (2016) Piecewise-spreading regime model for calculating effective Gol’dberg numbers for supersonic jet noise. AIAA J. 54:9, 2833-2842. doi: 10.2514/1.J054790 | script available

Baars, W.J., Squire, D.T., Talluru, K.M., Abbassi, M.R., Hutchins, N., Marusic, I. (2016) Wall-drag measurements of smooth- and rough-wall turbulent boundary layers using a floating element. Exp. Fluids 57:5, 90, 1-16. doi: 10.1007/s00348-016-2168-y | data available

Fiévet, R., Tinney, C.E., Baars, W.J., Hamilton, M.F. (2016) Coalescence in the sound field of a laboratory scale supersonic jet. AIAA J. 54:1, 254-265. doi: 10.2514/1.J054252

Baars, W.J., Talluru, K.M., Hutchins, N., Marusic, I. (2015) Wavelet analysis of wall turbulence to study large-scale modulation of small scales. Exp. Fluids 56:10, 188, 1-15. doi: 10.1007/s00348-015-2058-8

Baars, W.J., Ruf, J.H., Tinney, C.E. (2015) Non-stationary shock motion unsteadiness in an axisymmetric geometry with pressure gradient. Exp. Fluids 56:5, 92, 1-18. doi: 10.1007/s00348-015-1958-y

Donald, B.W., Baars, W.J., Tinney, C.E., Ruf, J.H. (2014) The sound from large area ratio nozzles during fixed and transient operations. AIAA J. 52:7, 1474-1485. doi: 10.2514/1.J052588

Baars, W.J., Tinney, C.E., Wochner, M.S., Hamilton, M.F. (2014) On cumulative nonlinear acoustic waveform distortions from high-speed jets. J. Fluid Mech. 749, 331-366. doi: 10.1017/jfm.2014.228

Baars, W.J., Tinney, C.E. (2014) Proper orthogonal decomposition-based spectral higher-order stochastic estimation. Phys. Fluids 26, 055112, 1-20. doi: 10.1063/1.4879255

Baars, W.J., Tinney, C.E. (2014) Shock-structures in the acoustic field of a Mach 3 jet with crackle. J. Sound Vibr. 333:12, 2539-2553. doi: 10.1016/j.jsv.2014.01.008

Baars, W.J., Tinney, C.E. (2013) Transient wall pressures in an overexpanded and large area-ratio nozzle. Exp. Fluids 54:2, 1468, 1-17. doi: 10.1007/s00348-013-1468-8

Baars, W.J., Tinney, C.E., Ruf, J.H., Brown, A.M., McDaniels, D.M. (2012) Wall pressure unsteadiness and side loads in overexpanded rocket nozzles. AIAA J. 50:1, 61-73. doi: 10.2514/1.J051075

Baars, W.J., Stearman, R.O., Tinney, C.E. (2010) A review on the impact of icing on aircraft stability and control. J. Aeroelast. Struct. Dyn. 2:1, 35-52. doi: 10.3293/asdj.2010.7

 

 

Conference Proceedings

(please contact me if you would like to receive any conference proceedings)

Abbassi, M.R., Baars, W.J., Hutchins, N., Marusic, I. (2016) Drag reduction via large-scale opposition flow control in a high-Reynolds-number turbulent boundary layer. 20th Australasian Fluid Mech. Conf., Perth, Australia.

Marusic, I., Baars, W.J., Hutchins, N. (2015) An extended view of the inner-outer interaction model for wall-bounded turbulence using spectral linear stochastic estimation. Proc. Engineering, 126, 24-28 (open access). doi: 10.1016/j.proeng.2015.11.171

Baars, W.J., Talluru, K.M., Hutchins, N., Marusic, I. (2015) Wavelet analysis of broadband signals to extract amplitude and frequency modulation: an application to wall turbulence. 15th European Turb. Conf., Delft, The Netherlands. online proceedings (.pdf)

Baars, W.J., Talluru, K.M., Bishop, B.J., Hutchins, N., Marusic, I. (2014) Spanwise inclination and meandering of large-scale structures in a high-Reynolds-number turbulent boundary layer. 19th Australasian Fluid Mech. Conf., Melbourne, Australia. online proceedings (.pdf)

Baars, W.J., Tinney, C.E., Hamilton, M.F. (2014) Challenges associated with studying nonlinear distortion of acoustic waveforms emitted by high-speed jets. Internoise 2014, Melbourne, VIC, Australia (invited). online proceedings (.pdf)

Fiévet, R., Tinney, C.E., Baars, W.J., Hamilton, M.F. (2014) Acoustic waveforms produced by a laboratory scale supersonic jet. AIAA-2014-2906, Atlanta, GA, USA. doi: 10.2514/6.2014-2906

Baars, W.J., Tinney, C.E. (2014) Temporal and spectral quantification of the ‘crackle’ component in supersonic jet noise. In Y. Zhou et al. (eds.), Fluid-Structure-Sound Interactions and Control, Lecture Notes in Mech. Eng., Springer-Verslag, Berlin, Proc. 2nd Symp. on Fluid-Structure-Sound Interactions and Control, Hong Kong & Macau, China. doi: 10.1007/978-3-642-40371-2_30

Baars, W.J., Tinney, C.E. (2013) Quantifying crackle-inducing acoustic shock-structures emitted by a fully-expanded Mach 3 jet. AIAA-2013-2081, Berlin, Germany. doi: 10.2514/6.2013-2081

Baars, W.J., Tinney, C.E. (2013) Time preserved jet crackle quantification. Texas Fluid Dynamics Meeting, Lake Buchanan, TX, USA.

Murray, N.E., Lyons, G., Tinney, C.E., Donald, B.W., Baars, W.J., Thurow, B., Haynes, H., Panickar, P. (2012) A laboratory framework for synchronous near/far-field acoustics and MHz PIV in high-temperature shock-containing jets. ASME/NCAD2012-1270, 505-519, Proc. Internoise 2012, New York, NY, USA. doi: 10.1115/NCAD2012-1270

Baars, W.J., Tinney, C.E., Wochner, M.S. (2012) Nonlinear noise propagation from a fully expanded Mach 3 jet. AIAA-2012-1177, Nashville, TN, USA. doi: 10.2514/6.2012-1177

Donald, B.W., Baars, W.J., Tinney, C.E., Ruf, J.H. (2012) Acoustic characterization of sub-scale rocket nozzles. AIAA-2012-0544, Nashville, TN, USA. doi: 10.2514/6.2012-544

Baars, W.J., Tinney, C.E., Ruf, J.H. (2011) Time-frequency analysis of rocket nozzle wall pressures during start-up transients. J. Phys. Conf. Ser., 318, 092001, Proc. 13th European Turb. Conf., Warsaw, Poland. doi: 10.1088/1742-6596/318/9/092001

Baars, W.J., Tinney, C.E., Murray, N.E., Jansen, B.J., Panickar, P. (2011) The effect of heat on turbulent mixing noise in supersonic jets. AIAA-2011-1029, Orlando, FL, USA. doi: 10.2514/6.2011-1029

Baars, W.J., Tinney, C.E., Ruf, J.H., Brown, A.M., McDaniels, D.M. (2010) On the unsteadiness associated with shock-induced separation in overexpanded rocket nozzles. AIAA-2010-6728, Nashville, TN, USA. doi: 10.2514/6.2010-6728

Baars, W.J., Tinney, C.E., Powers, E.J. (2010) POD based spectral higher-order stochastic estimation. AIAA-2010-1292, Orlando, FL, USA. doi: 10.2514/6.2010-1292

Baars, W.J., Tinney, C.E., Stearman, R.O. (2009) Higher-order statistical analysis of stability upsets induced by elevator horn icing. AIAA-2009-3770, San Antonio, TX, USA. doi: 10.2514/6.2009-3770

Baars, W.J., Stearman, R.O., Tinney, C.E. (2009) Wind tunnel studies employing higher order statistics to detect ice-induced upsets. IFASD-2009-012, Seattle, WA, USA.

 

 

Published Abstracts

Baars, W.J., Hutchins, N., Marusic, I. (2016) Spectral stochastic estimation of high-Reynolds-number wall-bounded turbulence for a refined inner-outer interaction model. Bull. of the Am. Physical. Soc., 61:20.

Baars, W.J., Hutchins, N., Marusic, I. (2015) Arrangement of scale-interaction and large-scale modulation in high Reynolds number turbulent boundary layers. Bull. of the Am. Physical. Soc., 60:21.

Baars, W.J., Tinney, C.E., Hamilton, M.F. (2015) Addressing the likelihood of cumulative nonlinear distortion in supersonic jet noise using the effective Gol’dberg number. Bull. of the Am. Physical. Soc., 60:21.

Rojo, R.M., Tinney, C.E., Baars, W.J., Ruf, J.H. (2014) End-effects-regime in full scale and lab scale rocket nozzles. Bull. of the Am. Physical. Soc., 59:20. BAPS.2014.DFD.H21.3

Baars, W.J., Talluru, K.M., Hutchins, N., Marusic, I. (2014) Floating element measurements of wall-shear stress exerted by high-Reynolds-number turbulent boundary layers. Bull. of the Am. Physical. Soc., 59:20. BAPS.2014.DFD.D26.2

Tinney, C.E., Baars, W.J. (2014) Where are the nonlinearities in jet noise? J. Acoust. Soc. Am., 136, 2101. doi: 10.1121/1.4899558

Rojo, R.M., Tinney, C.E., Baars, W.J., Ruf, J.H. (2013) Near-field/far-field study of the end-effects regime produced by large area ratio nozzles. J. Acoust. Soc. Am., 134, 4057 (invited). doi: 10.1121/1.4830804

Baars, W.J., Tinney, C.E. (2013) Transient unsteadiness of SWBLI in an axisymmetric geometry. Bull. of the Am. Physical. Soc., 58:18. BAPS.2013.DFD.A4.7

Fievet, R., Tinney, C.E., Silva, D., Baars, W.J. (2013) High fidelity measurements in the far-field of a Mach 3 jet. Bull. of the Am. Physical. Soc., 58:18. BAPS.2013.DFD.D24.7

Baars, W.J., Tinney, C.E. (2012) Scaling model for nonlinear supersonic jet noise. Bull. of the Am. Physical. Soc., 57:17. BAPS.2012.DFD.D24.8

Baars, W.J., Tinney, C.E. (2009) Higher-order system analysis. Bull. of the Am. Physical. Soc., 54:19. BAPS.2009.DFD.PB.7

 

 

Media

Baars, W.J. (2012) Supersonic flow research: getting a doctorate degree in the United States of America. Leonardo Times, J. Soc. of Aerospace Eng. Students `Leonardo da Vinci’, year 16:3, 8-9, Delft University of Technology, link: online magazine