The differences in mixing performance between axisymmetric turbulent jets issuing from three common types of nozzle, viz. a contoured (or smooth contraction) nozzle, a sharp-edged orifice and a long pipe, are investigated. The investigation is carried out using both qualitative flow visualizations and quantitative measurements of the centerline passive temperature. It is revealed that the jet issuing from an orifice plate provides the greatest rate of mixing with ambient fluid, while the pipe jet has the lowest rate. Physical insight into the differences is explored using a planar imaging technique and measurements of power spectra of the fluctuating velocity.
Issue Section:
Technical Papers
1.
Crow
, S. C.
, and Champagne
, F. H.
, 1971
, “Orderly Structure in Jet Turbulence
,” J. Fluid Mech.
, 48
, pp. 547
–591
.2.
Becker
, H. A.
, Hottal
, H. C.
, and Williams
, G. C.
, 1967
, “The Nozzle-Fluid Concentration Field of the Round, Turbulent, Free Jet
,” J. Fluid Mech.
, 30
, pp. 285
–303
.3.
Lockwood
, F. C.
, and Moneib
, A.
, 1980
, “Fluctuating Temperature Measurements in a Heated Round Free Jet
,” Combust. Sci. Technol.
, 22
, pp. 63
–81
.4.
Pitts
, W. M.
, 1991
, “Effects of Global Density Ratio on the Centerline Mixing Behavior of Axisymmetric Turbulent Jets
,” Exp. Fluids
, 11
, pp. 125
–134
.5.
Pitts
, W. M.
, 1991
, “Reynolds Number Effects on the Centerline Mixing Behavior of Axisymmetric Turbulent Jets
,” Exp. Fluids
, 11
, pp. 135
–144
.6.
Richards
, C. D.
, and Pitts
, W. M.
, 1993
, “Global Density Effects on the Self-Preservation Behavior of Turbulent Free Jets
,” J. Fluid Mech.
, 245
, pp. 417
–435
.7.
Wilson
, R. A. M.
, and Danckwerts
, P. V.
, 1964
, “Studies in Turbulent Mixing — II. A Hot Air Jet
,” Chem. Eng. Sci.
, 19
, pp. 885
–895
.8.
Quinn
, W. R.
, 1989
, “On Mixing in an Elliptic Turbulent Free Jet
,” Phys. Fluids A
, 1
, pp. 1716
–1722
.9.
Quinn
, W. R.
, 1992
, “Streamwise Evolution of a Square Jet Cross Section
,” AIAA J.
, 30
, pp. 2852
–2857
.10.
Mi
, J.
, Nathan
, G. J.
, and Luxton
, R. E.
, 2000
, “Centerline Mixing Characteristics of Jets From Nine Differently Shaped Nozzles
,” Exp. Fluids
, 28
, pp. 93
–95
.11.
Koshigoe
, S.
, Gutmark
, E. J.
, and Schadow
, K. C.
, 1989
, “Initial Development of Noncircular Jets Leading to Axis Switching
,” AIAA J.
, 27
, pp. 411
–419
.12.
Gutmark
, E. J.
, and Grinstein
, F. F.
, 1999
, “Flow Control With Noncircular Jets
,” Annu. Rev. Fluid Mech.
, 31
, pp. 239
–272
.13.
Wygnanski
, I.
, Champagne
, F.
, and Marasli
, B.
, 1986
, “On the Large-Scale Structures in Two Dimensional, Small-Deficit, Turbulent Wakes
,” J. Fluid Mech.
, 168
, pp. 31
–71
.14.
George, W. K., 1989, “The Self-Similarity of Turbulent Flows and Its Relation to Initial Conditions and Coherent Structures,” Recent Advances in Turbulence, R. E. A. Arndt and W. K. George, eds., Hemisphere, New York, pp. 39–73.
15.
Mi
, J.
, Nobes
, D.
, and Nathan
, G. J.
, 2001
, “Influence of Jet Exit Conditions on the Passive Scaler Field of an Axisymmetric Free Jet
,” J. Fluid Mech.
, 432
, pp. 91
–125
.16.
Paranthoen
, P.
, Petit
, C.
, and Lecordier
, J. C.
, 1982
, “The Effect of Thermal Prong-Wire Interaction on the Response of a Cold Wire in Gaseous Flows (Air, Argon and Helium)
,” J. Fluid Mech.
, 124
, pp. 457
–473
.17.
Rosenweig
, R. E.
, Hottel
, H. C.
, and Williams
, G. C.
, 1961
, “Smoke-Scattering Light Measurements of Turbulent Concentration Fluctuation
,” Chem. Eng. Sci.
, 15
, pp. 111
–129
.18.
Becker, H. A., Hottal, H. C., and Williams, G. C., 1963, “Mixing and Flow in Ducted Turbulent Jets,” Ninth Symposium (International) on Combustion, Pittsburgh: The Combustion Institute, pp. 7–20.
19.
Becker
, H. A.
, Hottal
, H. C.
, and Williams
, G. C.
, 1967
, “On the Light-scattering Technique for the Study of Turbulence and Mixing
,” J. Fluid Mech.
, 30
, pp. 259
–284
.20.
Becker, H. A., 1977, “Mixing, Concentration Fluctuations, and Marker Nephelometry,” Studies in Convection, Vol. 2, B. E. Launder, ed., Academic Press, New York, pp. 45–139.
21.
Papadopoulos
, G.
, and Pitts
, W. M.
, 1998
, “Scaling the Near-Field Centerline Mixing Behavior of Axisymmetric Turbulent Jets
,” AIAA J.
, 36
, pp. 1635
–1642
.22.
Gouldin
, F. C.
, Schefer
, R. W.
, Johnson
, S. C.
, and Kollmann
, W.
, 1986
, “Nonreacting Turbulent Mixing Flows
,” Prog. Energy Combust. Sci.
, 12
, pp. 257
–303
.23.
Ho
, C. W.
, and Nosseir
, N. S.
, 1981
, “Dynamics of an Impinging Jet. Part 1. The Feedback Phenomenon
,” J. Fluid Mech.
, 105
, pp. 119
–142
.24.
Grinstein, F. F., Glauser, M. N., and George, W. K., 1995, “Vorticity in Jets,” Chapter III, Fluid Vortices, S. I. Green, ed., Kluwer Academic Publisher, Netherlands, pp. 65–94.
25.
Liepmann
, D.
, and Gharib
, M.
, 1992
, “The Role of Streamwise Vorticity in the Near-Field Entrainment of Round Jets
,” J. Fluid Mech.
, 245
, pp. 643
–68
.26.
Hussain
, A. K. M. F.
, 1986
, “Coherent Structures and Turbulence
,” J. Fluid Mech.
, 173
, pp. 303
–356
.27.
Reeder
, M. F.
, and Samimy
, M.
, 1996
, “The Evolution of a Jet With Vortex-Generating Tabs: Real-Time Visualization and Quantitative Measurements
,” J. Fluid Mech.
, 311
, pp. 73
–118
.28.
Zaman
, K. B. M.
, 1999
, “Spreading Characteristics of Compressible Jets From Nozzles of Various Geometries
,” J. Fluid Mech.
, 383
, pp. 197
–228
.29.
Mi
, J.
, and Nathan
, G. J.
, 1999
, “Effect of Small Vortex-Generators on Scalar Mixing in the Developing Region of a Turbulent Jet
,” Intl. J. Heat & Mass Transfer
, 42
, pp. 3919
–3926
.30.
Hussain
, F.
, and Husain
, H. S.
, 1989
, “Elliptic Jets. Part 1. Characteristics of Unexcited and Excited Jets
,” J. Fluid Mech.
, 208
, pp. 257
–320
.31.
Ho
, C. M.
, and Gutmark
, E. J.
, 1987
, “Vortex Induction and Mass Entrainment in a Small-Aspect Ratio Elliptic Jet
,” J. Fluid Mech.
, 179
, pp. 383
–405
.32.
Miller
, R. S.
, Madnia
, C. K.
, and Givi
, P.
, 1995
, “Numerical Simulation of Non-Circular Jets
,” Comput. Fluids
, 24
, No. 1
, pp. 1
–25
.33.
Russ
, S.
, and Strykowski
, P. J.
, 1993
, “Turbulent Structure and Entrainment in Heated Jets: The Effect of Initial Conditions
,” Phys. Fluids A
, 5
, pp. 3216
–3225
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