The effects of elevated free-stream turbulence on flow and thermal structures in transitional boundary layers were investigated experimentally on a heated flat plate. Detailed boundary layer measurements using a three-wire probe and wall heat transfer were made with free-stream turbulence intensities of 0.5, 3.8, 5.5, and 6.4 percent, respectively. The onset of transition, transition length, and the turbulent spot formation rate were determined. The statistical results of the streamwise and cross-stream velocity fluctuations, temperature fluctuation, Reynolds stresses, and Reynolds heat fluxes were presented. The eddy viscosity, turbulent thermal diffusivity, and the turbulent Prandtl number were calculated and related physical mechanisms are discussed.

Issue Section:
Research Papers
Topics:
Boundary layers, Flow (Dynamics), Turbulence, Eddies (Fluid dynamics), Flat plates, Fluctuations (Physics), Flux (Metallurgy), Heat, Heat transfer, Prandtl number, Probes, Stress, Temperature, Thermal diffusivity, Viscosity, Wire
1.
Abu-Ghannam
J. B.
, and
Shaw
R.
,
1980
, “
Natural Transition of Boundary Layers—the Effects of Turbulence, Pressure Gradient, and Flow History
,”
J. Mech. Eng. Sci.
, Vol.
22
, pp.
213
–
228
.
2.
Baines
W. D.
, and
Peterson
E. G.
,
1951
, “
An Investigation of Flow Through Screens
,”
Trans. ASME
, Vol.
73
, pp.
467
–
480
.
3.
Blair
M. F.
,
1982
, “
Influence of Free-Stream Turbulence on Boundary Layer Transition in Favorable Pressure Gradients
,”
ASME Journal of Engineering for Power
, Vol.
104
, pp.
743
–
750
.
4.
Blair
M. F.
,
1983
a, “
Influence of Free-Stream Turbulence on Turbulent Boundary Layer Heat Transfer and Mean Profile Development, Part I—Experimental Data
,”
ASME Journal of Heat Transfer
, Vol.
105
, pp.
33
–
40
.
5.
Blair
M. F.
,
1983
b, “
Influence of Free-Stream Turbulence on Turbulent Boundary Layer Heat Transfer and Mean Profile Development, Part II—Analysis of Results
,”
ASME Journal of Heat Transfer
, Vol.
105
, pp.
41
–
47
.
6.
Chua
L. P.
, and
Antonia
R. A.
,
1990
, “
Turbulent Prandtl Number in a Circular Jet
,”
International Journal of Heat and Mass Transfer
, Vol.
33
, No.
2
, pp.
331
–
339
.
7.
Dhawan
S.
, and
Narasimha
R.
,
1958
, “
Some Properties of Boundary Layer Flow During Transition From Laminar to Turbulent Motion
,”
J. Fluid Mech.
, Vol.
3
, pp.
418
–
436
.
8.
Dyban
Y. P.
,
Epik
E. Y.
, and
Suprun
T. T.
,
1980
, “
Characteristics of the Laminar Boundary Layer in the Presence of Elevated Free-Stream Turbulence
,”
Fluid Mechanics—Soviet Research
[in English], Vol.
22
, No.
5
, pp.
213
–
228
.
9.
Emmons
H. W.
,
1951
, “
The Laminar-Turbulent Transition in a Boundary Layer—Part I
,”
J. Aero. Sci.
, Vol.
18
, pp.
490
–
498
.
10.
Graham, R. W., 1979, “Fundamental Mechanisms That Influence the Estimate of Heat Transfer to Gas Turbine Blades,” ASME Paper No. 79-HT-43.
11.
Graham, R. W., ed., 1984, Transition in Turbines, NASA TM-79128.
12.
Hinze, J. O., 1975, Turbulence, 2nd ed., McGraw-Hill, New York.
13.
Kim, J., Simon, T. W., and Kestoras, M., 1989, “Fluid Mechanics and Heat Transfer Measurements in Transitional Boundary Layers Conditionally Sampled on Intermittency,” presented at the 1989 ASME National Heat Transfer Conference, ASME HTD-Vol. 107, pp. 69–81.
14.
Kistler
A. L.
, and
Vrebalovich
T.
,
1966
, “
Grid Turbulence at Large Reynolds Numbers
,”
J. Fluid Mech.
, Vol.
26
, pp.
37
–
44
.
15.
Klebanoff
P. S.
,
Tidstrom
K. D.
, and
Sargent
L. M.
,
1962
, “
The Three-Dimensional Nature of Boundary-Layer Instability
,”
J. Fluid Mech.
, Vol.
12
, pp.
1
–
34
.
16.
Kuan, C. L., 1987, “An Experimental Investigation of Intermittent Behavior in the Transitional Boundary Layer,” M.S. Thesis, Clemson University, Clemson, SC.
17.
Kuan
C. L.
, and
Wang
T.
,
1990
, “
Investigation of Intermittent Behavior of Transitional Boundary Layer Using a Conditional Averaging Technique
,”
Experimental Thermal and Fluid Science
, Vol.
3
, pp.
157
–
170
; also presented in 1989 at AIAA 20th Fluid Dynamics Plasma Dynamics and Lasers Conference, AIAA 89-1890.
18.
Mayle
R. E.
,
1991
, “
The Role of Laminar–Turbulent Transition in Gas Transition Engines
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
113
, pp.
509
–
537
.
19.
Morkovin, M. V., 1969, “On the Many Faces of Transition,” Viscous Drag Reduction, C. S. Wells, ed., Plenum Press, New York, pp. 1–31.
20.
Morkovin, M. V., 1978, “Instability, Transition to Turbulence and Predictability,” AGARDograph 236.
21.
Narasimha
R.
,
1985
, “
The Laminar–Turbulent Transition Zone in the Boundary Layer
,”
Prog. Aerospace Sci.
, Vol.
22
, pp.
29
–
80
.
22.
Reshotko
E.
,
1976
, “
Boundary Layer Stability and Transition
,”
Ann. Rev. Fl. Mech.
, Vol.
8
, p.
311
–
350
.
23.
Schubauer, G. B., and Skramstad, H. K., 1948, “Laminar Boundary-Layer Oscillations and Transition on a Flat Plate,” NACA Report 909.
24.
Shome, B., 1991, “Development of a Three-Wire Probe for the Measurement of Reynolds Stresses and Heat Fluxes in Transitional Boundary Layers,” MS Thesis, Dept. of Mech. Engr., Clemson University, Clemson, SC.
25.
Sohn, K. H., and Reshotko, E., 1991, “Experimental Study of Boundary Layer Transition With Elevated Freestream Turbulence on a Heated Flat Plate,” NASA CR-187068.
26.
Sohn
K. H.
,
Reshotko
E.
, and
Zaman
K. B. M. Q.
,
1991
, “
Experimental Study of Boundary Layer Transition on a Heated Flat Plate
,”
ASME FED
-Vol.
114
, pp.
163
–
171
.
27.
Suder, K. L., O’Brien, J. E., and Reshotko, E., 1988, “Experimental Study of Bypass Transition in a Boundary Layer,” NASA TM-100913.
28.
Tani
I.
,
1981
, “
Three-Dimensional Aspects of Boundary Layer Transition
,”
Proc. Indian Acad. Sci.
, Vol.
4
, Part 2, pp.
219
–
238
.
29.
Turner
A. B.
,
1971
, “
Local Heat Transfer Measurements on a Gas Turbine Blade
,”
J. Mech. Eng. Sci.
, Vol.
13
, pp.
1
–
12
.
30.
Volino
R. J.
, and
Simon
T. W.
,
1995
, “
Bypass Transition in Boundary Layers Including Curvature and Favorable Pressure Gradient Effects
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
117
, No.
1
, pp.
166
–
174
.
31.
Wang
T.
, and
Simon
T. W.
,
1989
, “
Development of a Special-Purpose Test Surface Guided by Uncertainty Analysis
,”
Journal of Thermophysics
, Vol.
3
, No.
1
, pp.
19
–
26
.
32.
Wang
T.
,
Simon
T. W.
, and
Buddhavarapu
J.
,
1987
, “
Heat Transfer and Fluid Mechanics Measurements in Transitional Boundary Layer Flows
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
109
, No.
3
, pp.
443
–
450
.
33.
Wang
T.
,
Keller
F. J.
, and
Zhou
D.
,
1992
, “
Experimental Investigation of Reynolds Shear Stresses and Heat Fluxes in a Transitional Boundary Layer
,”
Fundamental and Applied Heat Transfer Research for Gas Turbine Engines
, ASME HTD-Vol.
226
, pp.
61
–
70
.
34.
Zhou, D., 1993, “Effects of Elevated Free-Stream Turbulence and Favorable Pressure Gradient on Flow and Thermal Structures in Transitional Boundary Layers,” Ph.D. Dissertation, Dept. of Mech. Engr., Clemson University, Clemson, SC.
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