The turbulent flow through a 3D diffuser featuring a double expansion is investigated using computational fluid dynamics. Time dependent simulations are reported using the stress omega Reynolds stress model available in ANSYS FLUENT 13.0. The flow topography and characteristics over a range of Reynolds numbers from 42,000 to 170,000 is reported, and its features are consistent with those investigated for other similar geometries. A transition from a chaotic separated flow to one featuring one large recirculation in one corner of the diffuser is predicted at a Reynolds number of 80,000. For a Reynolds number of 170,000 a precessing/flapping motion of the main flow field was identified, the frequency of which is consistent with other numerical and experimental studies.
Issue Section:
Flows in Complex Systems
References
1.
Nathan
, G. J.
, Hill
, S. J.
, and Luxton
, R. E.
, 1998
, “An Axisymmetric ‘Fluidic’ Nozzle to Generate Jet Precession
,” J. Fluid Mech.
, 370
, pp. 347
–380
.10.1017/S002211209800202X2.
Giddings
, D.
, Aroussi
, A.
, Pickering
, S.
, and Mozaffari
, E.
, 2004
, “A 1/4 Scale Test Facility for PF Transport in Power Station Pipelines
,” Fuel
, 83
(16
), pp. 2195
–2204
.10.1016/j.fuel.2004.05.0023.
Patrick
, W. P.
, and McCormick
, D. C.
, 1988
, “Laser Velocimeter and Total Pressure Measurements in Circular-to-Rectangular Transition Ducts
,” United Technologies Research Center
, Tech. Report 87.4.
Miau
, J. J.
, Leu
, T. S.
, Chou
, J. H.
, Lin
, S. A.
, and Lin
, C.
, 1990
, “Flow Distortion in a Circular-to-Rectangular Transition Duct
,” AIAA J.
, 28
(8
), pp. 1447
–1456
.10.2514/3.252375.
Davis
, D. O.
, and Gessner
, F. B.
, 1992
, “Experimental Investigation of Turbulent Flow Through a Circular-to-Rectangular Transition Duct
,” AIAA J.
, 30
(2
), pp. 367
–375
.10.2514/3.109276.
Fox
, R. W.
, and Kline
, S. J.
, 1962
, “Flow Regimes in Curved Subsonic Diffusers
,” J. Basic Eng.
, 84
(3
), pp. 303
–312
.10.1115/1.36573077.
Smith
, C. R.
, 1978
, “Transitory Stall Time Scales for Plane Wall Air Diffusers
,” ASME J. Fluid. Eng.
, 100
(1
), pp. 133
–135
.10.1115/1.34485898.
Smith
, C. R.
, and Layne
, J. L.
, 1979
, “An Experimental Investigation of Flow Unsteadiness Generated by Transitory Stall in Plane-Wall Diffusers
,” ASME J. Fluid. Eng.
, 101
(2
), pp. 181
–185
.10.1115/1.34489319.
Kiya
, M.
, Shimizu
, M.
, and Mochizuki
, O.
, 1997
, “Sinusoidal Forcing of a Turbulent Separation Bubble
,” J. Fluid Mech.
, 342
, pp. 119
–139
.10.1017/S002211209700552110.
Brunn
, A.
, and Nitsche
, W.
, 2003
, “Separation Control by Periodic Diffuser Flow
,” J, Turbulence
, 4
, pp. 1
–13
.10.1088/1468-5248/4/1/00911.
Sigurdson
, L. W.
, 1995
, “The Structure and Control of a Turbulent Reattaching Flow
,” J. Fluid Mech.
, 298
, pp. 139
–165
.10.1017/S002211209500325912.
Obi
, S.
, Aoki
, K.
, and Masuda
, S.
, 1993
, “Experimental and Computational Study of Turbulent Separating Flow in an Asymmetric Plane Diffuser
,” Ninth Symposium on Turbulent Shear Flows
, Hyoto, Japan
, pp. 305-1
–305-4
.13.
Obi
, S.
, Ohimuzi
, H.
, Aoki
, K.
, and Masuda
, S.
, 1993
, “Turbulent Separation Control in a Plane Asymmetric Diffuser by Periodic Perturbation
,” Engineering Turbulence Modelling and Experiments 2
, W.
Rodi
and F.
Martelli
, eds., Elsevier
, Amsterdam, The Netherlands
.14.
Buice
, C. U.
, 1997
, “Experimental Investigation of Flow Through an Asymmetric Plane Diffuser
,” Ph.D. thesis, Stanford University
, Stanford, CA
.15.
Buice
, C. U.
, and Eaton
, J. K.
, 2000
, “Experimental Investigation of Flow Through an Asymmetric Plane Diffuser
,” ASME J. Fluid. Eng.
, 122
, pp. 433
–435
.10.1115/1.48327816.
Hill
, S. J.
, Nathan
, G. J.
, and Luxton
, R. E.
, 1995
, “Precession in Axisymmetric Confined Jets
,” Twelfth Australasian Fluid Mechanics Conference
, pp. 135
–138
.17.
Lawson
, N. J.
, and Davidson
, M. R.
, 2001
, “Self-Sustained Oscillation of a Submerged Jet in a Thin Rectangular Cavity
,” J. Fluid. Struct.
, 15
, pp. 59
–81
.10.1006/jfls.2000.032718.
Honeyands
, T. A.
, and Molloy
, N. A.
, 1995
, “Oscillations of Submerged Jets Confined in a Narrow Deep Rectangular Cavity
,” Twelfth Australasian Fluid Mechanics Conference
, pp. 493
–496
.19.
Brunn
, A.
, and Nitsche
, W.
, 2002
, “Separation Control in an Axisymmetric Diffuser Flow by Periodic Excitation
,” Engineering Turbulence Modelling and Experiments 5
, W.
Rodi
and N.
Fueyo
, eds., Elsevier Science Ltd.
, Oxford, UK
, pp. 587
–596
.20.
Guo
, B.
, Langrish
, T. A. G.
, and Fletcher
, D. F.
, 2001
, “Numerical Simulation of Unsteady Turbulent Flow in Axisymmetric Sudden Expansions
,” ASME J. Fluid. Eng.
, 123
(3
), pp. 574
–587
.10.1115/1.137444121.
Panitz
, T.
, and Wasan
, D. T.
, 1972
, “Flow Attachment to Solid Surfaces: The Coanda Effect
,” AIChE J.
, 18
(1
), pp. 51
–57
.10.1002/aic.69018011122.
Chiekh
, M. B.
, Bera
, J.-C.
, and Sunyach
, M.
, 2003
, “Synthetic Jet Control for Flows
,” J. Turbulence
, 4
(32
), pp. 37
–41
.10.1088/1468-5248/4/1/03223.
Cherry
, E.
, Elkins
, C.
, and Eaton
, J.
, 2008
, “Geometric Sensitivity of Three-Dimensional Separated Flows
,” Int. J. Heat Fluid Flow
, 29
(3
), pp. 803
–811
.10.1016/j.ijheatfluidflow.2008.01.01824.
Steiner
, H.
, Jakirlic
, S.
, Kadavelil
, G.
, Manceau
, R.
, Saric
, S.
, and Brenn
, G.
, 2008
, “13th ERCOFTAC Workshop on Refined Turbulence Modelling
,” ERCOFTAC Bulletin 78
, pp. 22
–27
.25.
Menter
, F. R.
, Garbaruk
, A. V.
, and Egorov
, Y.
, 2009
, “Explicit Algebraic Reynolds Stress Models for Anisotropic Wall-Bounded Flows
,” EUCASS—3rd European Conference for Aero-Space Sciences
.26.
Karvinen
, A.
, and Ahlstedt
, H.
, 2008
, “Comparison of Turbulence Models in Case of Three-Dimensional Diffuser
,” Proceedings of Open Source CFD International Conference 2008
.27.
Schneider
, H.
, Von Terzi
, D. A.
, Bauer
, H.-J.
, and Rodi
, W.
, 2011
, “A Mechanism for Control of Turbulent Separated Flow in Rectangular Diffusers
,” J. Fluid Mech.
, 687
, pp. 584
–594
.10.1017/jfm.2011.39528.
Hirsch
, C.
, and Tartinville
, B.
, 2009
, “Reynolds-Averaged Navier–Stokes Modelling for Industrial Applications and Some Challenging Issues
,” Int. J. Comput. Fluid Dyn.
, 23
(4
), pp. 295
–303
.10.1080/1061856090277337929.
Berdanier
, R. A.
, 2011
, “Turbulent Flow Through an Asymmetric Plane Diffuser
,” Masters thesis, Purdue University
, West Lafayette, IN
.30.
Wilcox
, D.
, 1993
, “Comparison of Two-Equation Turbulence Models for Boundary Layers With Pressure Gradient
,” AIAA J.
, 31
(8
), pp. 1414
–1421
.10.2514/3.1179031.
ANSYS, Inc.
, 2011
, “ANSYS FLUENT Theory Guide
,” Tech. Report.Copyright © 2013 by ASME
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