An experimental study of the structure of round buoyant turbulent plumes was carried out, limited to conditions within the fully developed (self-preserving) portion of the flow. Plume conditions were simulated using dense gas sources (carbon dioxide and sulfur hexafluoride) in a still air environment. Velocity statistics were measured using laser velocimetry in order to supplement earlier measurements of mixture fraction statistics using laser-induced iodine fluorescence. Similar to the earlier observations of mixture fraction statistics, self-preserving behavior was observed for velocity statistics over the present test range (87–151 source diameters and 12–43 Morton length scales from the source), which was farther from the source than most earlier measurements. Additionally, the new measurements indicated that self-preserving plumes are narrower, with larger mean streamwise velocities near the axis (when appropriately scaled) and with smaller entrainment rates, than previously thought. Velocity statistics reported include mean and fluctuating velocities, temporal power spectra, temporal and spatial integral scales, and Reynolds stresses.

Issue Section:
Natural and Mixed Convection
Keywords:
Natural Convection, Plumes, Turbulence
Topics:
Plumes (Fluid dynamics), Statistics, Turbulence
1.
Abraham
G.
,
1960
, “
Jet Diffusion in Liquid of Greater Density
,”
ASCE J. Hyd. Div.
, Vol.
86
, pp.
1
–
13
.
2.
Becker
H. A.
,
Hottel
H. C.
, and
Williams
G. C.
,
1967
, “
The Nozzle-Fluid Concentration Field of the Round, Turbulent, Free Jet
,”
J. Fluid Mech.
, Vol.
30
, pp.
285
–
303
.
3.
Chen, C. J., and Rodi, W., 1980, Vertical Turbulent Buoyant Jets: A Review of Experimental Data, Pergamon Press, Oxford, p. 16.
4.
Dai
Z.
,
Tseng
L.-K.
, and
Faeth
G. M.
,
1994
, “
Structure of Round, Fully Developed, Buoyant Turbulent Plumes
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
116
, pp.
409
–
417
.
5.
George
W. K.
,
Alpert
R. L.
, and
Tamanini
F.
,
1977
, “
Turbulence Measurements in an Axisymmetric Buoyant Plume
,”
Int. J. Heat Mass Trans.
, Vol.
20
, pp.
1145
–
1154
.
6.
Hinze, J. O., 1975, Turbulence, 2nd ed., McGraw-Hill, New York, pp. 175–319.
7.
Kotsovinos
N. E.
,
1985
, “
Temperature Measurements in a Turbulent Round Plume
,”
Int. J. Heat Mass Trans.
, Vol.
28
, pp.
771
–
777
.
8.
Kotsovinos
N. E.
, and
List
E. J.
,
1977
, “
Turbulent Buoyant Jets. Part 1. Integral Properties
,”
J. Fluid Mech.
, Vol.
81
, pp.
25
–
44
.
9.
Kounalakis
M. E.
,
Sivathanu
Y. R.
, and
Faeth
G. M.
,
1991
, “
Infrared Radiation Statistics of Nonluminous Turbulent Diffusion Flames
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
113
, pp.
437
–
445
.
10.
Lai
M.-C.
, and
Faeth
G. M.
,
1987
, “
A Combined Laser-Doppler Anemometer/Laser-Induced Fluorescence System for Turbulent Transport Measurements
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
109
, pp.
254
–
256
.
11.
List
E. J.
,
1982
, “
Turbulent Jets and Plumes
,”
Ann. Rev. Fluid Mech.
, Vol.
14
, pp.
189
–
212
.
12.
Mizushima
T.
,
Ogino
F.
,
Veda
H.
, and
Komori
S.
,
1979
, “
Application of Laser-Doppler Velocimetry to Turbulence Measurements in Non-isothermal Flow
,”
Proc. Roy. Soc. London
, Vol.
A366
, pp.
63
–
79
.
13.
Morton
B. R.
,
Taylor
G. I.
, and
Turner
J. S.
,
1956
, “
Turbulent Gravitational Convection From Maintained and Instantaneous Sources
,”
Proc. Roy. Soc. London
, Vol.
A234
, pp.
1
–
23
.
14.
Morton
B. R.
,
1959
, “
Forced Plumes
,”
J. Fluid Mech.
, Vol.
5
, pp.
151
–
163
.
15.
Nakagome, H., and Hirata, M., 1977, “The Structure of Turbulent Diffusion in an Axisymmetrical Thermal Plume,” Heat Transfer and Turbulent Buoyant Convection, D. B. Spalding and N. Afgan, eds., McGraw-Hill, New York, pp. 367–372.
16.
Ogino
F.
,
Takeuchi
H.
,
Kudo
I.
, and
Mizushima
T.
,
1980
, “
Heated Jet Discharged Vertically in Ambients of Uniform and Linear Temperature Profiles
,”
Int. J. Heat Mass Trans.
, Vol.
23
, pp.
1581
–
1588
.
17.
Papanicolaou
P. N.
, and
List
E. J.
,
1987
, “
Statistical and Spectral Properties of Tracer Concentration in Round Buoyant Jets
,”
Int. J. Heat Mass Trans.
, Vol.
30
, pp.
2059
–
2071
.
18.
Papanicolaou
P. N.
, and
List
E. J.
,
1988
, “
Investigation of Round Vertical Turbulent Buoyant Jets
,”
J. Fluid Mech.
, Vol.
195
, pp.
341
–
391
.
19.
Papantoniou
D.
, and
List
E. J.
,
1989
, “
Large Scale Structure in the Far Field of Buoyant Jets
,”
J. Fluid Mech.
, Vol.
209
, pp.
151
–
190
.
20.
Peterson
J.
, and
Bayazitoglu
Y.
,
1992
, “
Measurements of Velocity and Turbulence in Vertical Axisymmetric Isothermal and Buoyant Plumes
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
114
, pp.
135
–
142
.
21.
Rouse
H.
,
Yih
C. S.
, and
Humphreys
H. W.
,
1952
, “
Gravitational Convection From a Boundary Source
,”
Tellus
, Vol.
4
, pp.
201
–
210
.
22.
Seban
R. A.
, and
Behnia
M. M.
,
1976
, “
Turbulent Buoyant Jets in Unstratified Surroundings
,”
Int. J. Heat Mass Trans.
, Vol.
19
, pp.
1197
–
1204
.
23.
Shabbir, A., and George, W. K., 1992, “Experiments on a Round Turbulent Buoyant Plume,” NASA Technical Memorandum 105955.
24.
Tennekes, H., and Lumley, J. L., 1972, A First Course in Turbulence, M.I.T. Press, Cambridge, MA.
25.
Zimin
V. D.
, and
Frik
P. G.
,
1977
, “
Averaged Temperature Fields in Asymmetrical Turbulent Streams Over Localized Heat Sources
,”
Izv. Akad. Nauk. SSSR, Mekhanika Zhidkosti Gaza
, Vol.
2
, pp.
199
–
203
.
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