In this paper, large-eddy simulation of the transition process in a separation bubble is compared to experimental results. The measurements and simulations are conducted under low freestream turbulence conditions over a flat plate with a streamwise pressure distribution typical of those encountered on the suction side of turbine airfoils. The computational grid is refined to the extent that the simulation qualifies as a “coarse” direct numerical simulation. The simulations are shown to accurately capture the transition process in the separated shear layer. The results of these simulations are used to gain further insight into the breakdown mechanisms in transitioning separation bubbles.
Issue Section:
Technical Papers
1.
Hall
, A. A.
, and Hislop
, G. S.
, 1938, “Experiments on the Transition of the Laminar Boundary Layer on a Flat Plate
,” ARC R & M 1843.2.
Schubauer
, G. B.
, and Skramstad
, H. K.
, 1948, “Laminar Boundary-Layer Oscillations and Transition on a Flat Plate
,” NACA TN 909.3.
Emmons
, H. W.
, 1951, “The Laminar-Turbulent Transition in a Boundary Layer-Part 1
,” J. Aeronautical Sci.
, 18
, pp. 490
–498
.4.
Klebanoff
, P. S.
, Tidstrom
, K. D.
, and Sargent
, L. M.
, 1961, “The Three-dimensional Nature of Boundary-layer Transition
,” J. Fluid Mech.
0022-1120, 12
, pp. 1
–42
.5.
Narasimha
, R.
, 1957, “On the Distribution of Intermittency in the Transition Region of a Boundary Layer
,” J. Aeronautical Sci.
, 24
, pp. 711
–712
.6.
Stieger
, R. D.
, and Hodson
, H. P.
, 2004, “The Transition Mechanism of Highly-Loaded LP Turbine Blades
,” ASME J. Turbomach.
0889-504X, 126
, pp. 536
–543
.7.
Hatman
, A.
, and Wang
, T.
, 1999, “A Prediction Model for Separated Flow Transition
,” ASME J. Turbomach.
0889-504X, 121
, pp. 594
–602
.8.
Johnson
, M. W.
, 1994, “A Bypass Transition Model for Boundary Layers
,” ASME J. Turbomach.
0889-504X, 116
, pp. 759
–764
.9.
Solomon
, W. J.
, Walker
, G. J.
, and Gostelow
, J. P.
, 1996, “Transition Length Prediction for Flows With Rapidly Changing Pressure Gradients
,” ASME J. Turbomach.
0889-504X, 118
, pp. 744
–751
.10.
Volino
, R. J.
, and Simon
, T. W.
, 1995, “Bypass Transition in Boundary Layers Including Curvature and Favorable Pressure Gradient Effects
,” ASME J. Turbomach.
0889-504X, 117
, pp. 166
–174
.11.
Roberts
, S. K.
, and Yaras
, M. I.
, 2005, “Modeling Transition in Attached and Separated Boundary Layers
,” ASME J. Turbomach.
0889-504X, 127
, pp. 402
–411
.12.
Roberts
, S. K.
, and Yaras
, M. I.
, 2003, “Effects of Periodic-Unsteadiness, Freestream Turbulence, and Flow Reynolds Number on Separation-Bubble Transition
,” ASME Paper No. GT2003-38262.13.
Roberts
, S. K.
, and Yaras
, M. I.
, 2005, “Boundary Layer Transition Affected by Surface Roughness and Freestream Turbulence
,” ASME J. Fluids Eng.
0098-2202, 127
, pp. 449
–457
.14.
Haueisen
, V.
, Henneke
, D. K.
, and Schröder
, T.
, 1997, “Measurements With Surface Mounted Hot Film Sensors on Boundary Layer Transition in Wake Disturbed Flow
,” AGARD CP-598.15.
Zhong
, S.
, Kittichaikarn
, C.
, Hodson
, H. P.
, and Ireland
, P. T.
, 2000, “Visualisation of Turbulent Spots under the Influence of Adverse Pressure Gradients
,” Exp. Fluids
0723-4864, 28
, pp. 385
–393
.16.
Anthony
, R.
, Jones
, T.
, and LaGraff
, J.
, 2004, “High Frequency Surface Heat Flux Imaging of Bypass Transition
,” ASME Paper No. GT2004-54162.17.
Lang
, M.
, Rist
, U.
, and Wagner
, S.
, 2004, “Investigations on Controlled Transition Development in a Laminar Separation Bubble by Means of LDA and PIV
,” Exp. Fluids
0723-4864, 36
, pp. 43
–52
.18.
Brendel
, M.
, and Mueller
, T. J.
, 1987, “Boundary Layer Measurements on an Airfoil at Low Reynolds Numbers
,” AIAA Paper No. 87-0495.19.
Mills
, R.
, Sheridan
, J.
, and Hourigan
, K.
, 2003, “Particle Image Velocimetry and Visualization of Natural and Forced Flow Around Rectangular Cylinders
,” J. Fluid Mech.
0022-1120, 478
, pp. 299
–323
.20.
Lang
, H.
, Mørck
, T.
, and Woisetschläger
, J.
, 2002, “Stereoscopic Particle Image Velocimetry in a Transonic Turbine Stage
,” Exp. Fluids
0723-4864, 32
, pp. 700
–709
.21.
Bao
, F.
, and Dallmann
, U. C.
, 2004, “Some Physical Aspects of Separation Bubble on a Rounded Backward-Facing Step
,” Aerosp. Sci. Technol.
1270-9638, 8
, pp. 83
–91
.22.
Rai
, M. M.
, and Moin
, P.
, 1993, “Direct Numerical Simulation of Transition and Turbulence in a Spatially Evolving Boundary Layer
,” J. Comput. Phys.
0021-9991, 109
, pp. 169
–192
.23.
Singer
, B. A.
, and Joslin
, R. D.
, 1994, “Metamorphosis of a Hairpin Vortex into a Young Turbulent Spot
,” Phys. Fluids
1070-6631, 6
, pp. 3724
–3736
.24.
Alam
, M.
, and Sandham
, N. D.
, 2000, “Direct Numerical Simulation of ‘Short’ Laminar Separation Bubbles With Turbulent Reattachment
,” J. Fluid Mech.
0022-1120, 410
, pp. 1
–28
.25.
Spalart
, P. R.
, and Strelets
, M. K.
, 2000, “Mechanisms of Transition and Heat Transfer in a Separation Bubble
,” J. Fluid Mech.
0022-1120, 403
, pp. 329
–349
.26.
Maucher
, U.
, Rist
, U.
, Kloker
, M.
, and Wagner
, S.
, 1999, “DNS of Laminar-Turbulent Transition in Separation-Bubbles
,” High Performance Computing in Science and Engineering ’99
, E.
Krause
, and W.
Jäger
eds., Springer
, New York
, pp. 279
–294
.27.
Pope
, S. B.
, 2000, Turbulent Flows
, Cambridge University Press
, New York
.28.
Dubois
, T.
, and Bouchon
, F.
, 1998, “Subgrid-Scale Models Based on Incremental Unknowns for Large Eddy Simulation
,” Center for Turbulence Research Annual Research Briefs
, Stanford, CApp. 221
–236
.29.
Spalart
, P. R.
, 2000, “Strategies for Turbulence Modeling and Simulations
,” Int. J. Heat Fluid Flow
0142-727X, 21
, pp. 252
–263
.30.
Rodi
, W.
, and Sheuerer
, G.
, 1985, “Calculation of Laminar-Turbulent Boundary Layer Transition on Turbine Blades
,” AGARD CP NO. 390.31.
Lesieur
, M.
, and Métais
, O.
, 1996, “New Trends in Large-Eddy Simulations of Turbulence
,” Annu. Rev. Fluid Mech.
0066-4189, 28
, pp. 45
–82
.32.
Yang
, Z.
, and Voke
, P. R.
, 2001, “Large-Eddy Simulation of Boundary-Layer Separation and Transition at a Change of Surface Curvature
,” J. Fluid Mech.
0022-1120, 493
, pp. 305
–333
.33.
Ducros
, F.
, Comte
, P.
, and Lesieur
, M.
, 1996, “Large-Eddy Simulation of Transition to Turbulence in a Boundary Layer Developing Spatially Over a Flat Plate
,” J. Fluid Mech.
0022-1120, 326
, pp. 1
–36
.34.
Piomelli
, U.
, and Balaras
, E.
, 2002, “Wall-Layer Models for Large Eddy Simulations
,” Annu. Rev. Fluid Mech.
0066-4189, 34
, pp. 349
–374
.35.
Gaster
, M.
, 1968, “Growth of Disturbances in Both Space and Time
,” Phys. Fluids
0031-9171, 11
, pp. 723
–727
.36.
Hammond
, D. A.
, and Redekopp
, L. G.
, 1998, “Local and Global Instability Properties of Separation Bubbles
,” Eur. J. Mech. B/Fluids
0997-7546, 17
, pp. 146
–164
.37.
Allen
, T.
, and Riley
, N.
, 1995, “Absolute and Convective Instabilities in Separation Bubbles
,” Aeronaut. J.
0001-9240, 99
, pp. 439
–448
.38.
Dovgal
, A. V.
, Kozlov
, V. V.
, and Michalke
, A.
, 1994, “Laminar Boundary Layer Separation: Instability and Associated Phenomena
,” Prog. Aerosp. Sci.
0376-0421, 30
, pp. 61
–94
.39.
Rist
, U.
, and Maucher
, U.
, 2002, “Investigations of Time-Growing Instabilities in Laminar Separation Bubbles
,” Eur. J. Mech. B/Fluids
0997-7546, 21
, pp. 495
–509
.40.
Roberts
, S. K.
, and Yaras
, M. I.
, 2005, “Effects of Surface Roughness Geometry on Separation Bubble Transition
,” ASME Paper No. GT2005-68664, ASME J. Turbomach.
, (to be published).41.
Mellen
, C. P.
, Frölich
, J.
, and Rodi
, W.
, 2002, “Lessons From the European LESFOIL Project on LES of Flow around an Airfoil
,” AIAA Paper No. 2002-0111.42.
Leonard
, A.
, 1996, “Direct Numerical Simulation of Turbulent Flows
,” Simulation and Modeling of Turbulent Flows
, T.
Gatski
M.
Hussaini
and J.
Lumley
, eds., Oxford University Press
, New York
.43.
Yeung
, P. K.
, and Pope
, S. B.
, 1989, “Lagrangian Statistics From Direct Numerical Simulations of Isotropic Turbulence
,” J. Fluid Mech.
0022-1120, 207
, pp. 531
–586
.44.
Walker
, G. J.
, 1989, “Transitional Flow on Axial Compressor Blading
,” AIAA J.
0001-1452, 27
, pp. 595
–602
.45.
Stieger
, R. D.
, Hollis
, D.
, and Hodson
, H. P.
, 2004, “Unsteady Surface Pressures Due to Wake-Induced Transition on a Laminar Separation Bubble on a Low-Pressure Cascade
,” ASME J. Turbomach.
0889-504X, 126
, pp. 544
–550
.46.
Hatman
, A.
, and Wang
, T.
, 1998, “Separated-Flow Transition Part 3-Primary Modes and Vortex Dynamics
,” ASME Paper No. 98-GT-463.47.
Bernal
, L. P.
, and Roshko
, A.
, 1986, “Streamwise Vortex Structure in Plane Mixing Layers
,” J. Fluid Mech.
0022-1120, 170
, pp. 499
–525
.48.
Moser
, R. D.
, and Rogers
, M. M.
, 1993, “Three-Dimensional Evolution of a Plane Mixing Layer: Pairing and Transition to Turbulence
,” J. Fluid Mech.
0022-1120, 247
, pp. 275
–320
.49.
Chandrasekhar
, S.
, 1961, Hydrodynamic and Hydromagnetic Stability
, Clarendon Press
, Oxford
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