The heat transfer characteristics of single and dual-exit drainage configurations for arrays of liquid jets impinging normal to a heated isoflux plate has been studied experimentally. The interaction of drainage channel crossflow from upstream jets and the stagnation jets and its impact on heat transfer was the focus of the investigation. Infrared thermography was used to measure the local temperature distribution on the heated plate, from which local heat transfer coefficients were determined. A single jet diameter was used, and jet arrays with jet-to-jet spacings of 4.8, 6, 8, and 12 jet diameters were studied. Average jet Reynolds numbers in the range 400–5000 were investigated for jet nozzle-to-impingement plate spacings of 1, 2, and 4 jet diameters for fully flooded (submerged) drainage flow. A single jet-to-plate spacing large enough to yield free-surface jets was also studied. The data reveal a complex dependence of local and average Nusselt numbers on the geometric parameters which describe the problem configuration.

Issue Section:
Jets, Wakes and Impingement
Keywords:
Experimental, Heat Transfer, Jets
Topics:
Drainage, Heat transfer, Jets
1.
Beckwith, T. G., Buck, N. L., and Marangoni, R. D., 1982, Mechanical Measurements, 3rd Ed., Addison-Wesley, Reading, MA.
2.
Florschuetz
L. W.
,
Berry
R. A.
, and
Metzger
D. E.
,
1980
, “
Periodic Streamwise Variations of Heat Transfer Coefficients for Inline and Staggered Arrays of Circular Jets With Crossflow of Spent Air
,’
ASME JOURNAL OF HEAT TRANSFER
, Vol.
102
, pp.
132
–
137
.
3.
Florschuetz
L. W.
,
Truman
C. R.
, and
Metzger
D. E.
,
1981
, “
Streamwise Flow and Heat Transfer Distributions for Jet Array Impingement With Crossflow
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
103
, pp.
337
–
342
.
4.
Gabour
L. A.
, and
Lienhard
J. H. V.
,
1993
, “
Wall Roughness Effects Stagnation-Point Heat Transfer Beneath an Impinging Jet
,”
ASME Heat Transfer Division
HTD-Vol.
249
, pp.
35
–
43
.
5.
Garrett, K., 1998, “The Effect of Drainage Configuration on Heat Transfer under Impinging Liquid Jet Array,” M.S. thesis, Brigham Young University, Provo, UT.
6.
Gerhart, P. M., and Gross, R. J., 1985, Fundamentals of Fluid Mechanics, Addison-Wesley, Reading, MA.
7.
Hollworth
B. R.
, and
Berry
R. D.
,
1978
, “
Heat Transfer From Arrays of Impinging Jets With Large Jet-to-Jet Spacing
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
100
, pp.
352
–
357
.
8.
Hoogendoorn
C. J.
,
1977
, “
The Effect of Turbulence on Heat Transfer at a Stagnation Point
,”
Int. J. Heat Mass Transfer
, Vol.
20
, pp.
1333
–
1338
.
9.
Huang
Y.
,
Ekkad
S. V.
, and
Han
J.-C.
,
1998
, “
Detailed Heat Transfer Distributions Under an Array of Orthogonal Impinging Jets
,”
AIAA J. Thermophysics Heat Transfer
, Vol.
12
, pp.
73
–
79
.
10.
Kercher
D. M.
, and
Tabakoff
W.
,
1970
, “
Heat Transfer by a Square Array Round Air Jets Impinging Perpendicular to a Flat Surface Including the Effect Spent Air
,”
ASME Journal of Engineering for Power
, Vol.
92
, pp.
73
–
82
.
11.
Kestin
J.
, and
Wood
R.
,
1971
, “
The Influence of Turbulence on Mass Transfer from Cylinders
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
93
, pp.
321
–
327
.
12.
Lienhard
V. J. H.
,
1995
, “
Liquid Jet Impingement
,”
Annual Review of Heat Transfer
, Vol.
6
, C. L. Tien, ed., Begell House, New York, pp.
199
-
270
.
13.
Lienhard
V. J. H.
,
Dahbura
R. S.
,
Younis
H. F.
, and
Oh
C. H.
,
1997
, “
Experiments on Jet-Array Cooling Modules With for High Heat Flux Removal
,”
High Heat Flux and Sychrontron Radiation Beamlines
, SPIE Vol.
3151
, pp.
6
–
17
.
14.
Martin
H.
,
1977
, “
Heat and Mass Transfer Between Impinging Gas Jets and Solid Surfaces
,”
Advances in Heat Transfer
, Vol.
13
, pp.
1
–
60
.
15.
Obot
N. T.
, and
Trabold
T. A.
,
1987
, “
Impingement Heat Transfer Within Arrays Circular Jets: Part 1—Effects of Minimum, Intermediate, and Complete Crossflow for Small and Large Spacings
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
109
, pp.
872
–
879
.
16.
Obot, N. T., Majumdar, A. A., and Douglas, W. J. M., 1979, “The Effects of Nozzle Geometry on Impingement Heat Transfer Under a Round Turbulent Jet,” ASME Paper No. 79-WA/HT-53.
17.
Oh
C. H.
,
Lienhard
V. J. H.
,
Younis
H. F.
,
Dahbura
R. S.
and
Michels
D.
,
1998
, “
Liquid Jet-Array Cooling Modules for High Heat Fluxes
,”
AIChE Journal
, Vol.
44
pp.
769
–
779
.
18.
Pan
Y.
, and
Webb
B. W.
,
1995
, “
Heat Transfer Characteristics of Arrays Free-Surface Liquid Jets
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
177
, pp.
878
–
883
.
19.
Pan
Y.
,
Stevens
J.
, and
Webb
B. W.
,
1992
, “
Effect of Nozzle Configuration on Transport in the Stagnation Zone of Axisymmetric. Impinging Free-Surface Liquid Jets: Part 2—Local Heat Transfer
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
114
, pp.
880
–
886
.
20.
Van Treuren
K. W.
,
Wang
Z.
,
Ireland
P. T.
, and
Jones
T. V.
,
1994
, “
Detailed Measurements of Local Heat Transfer Coefficient and Adiabatic Wall Temperature Beneath an Array of Impinging Jets
,”
ASME Journal of Turbomachinery
, Vol.
116
, pp.
369
–
374
.
21.
Webb
B. W.
, and
Ma
C.-F.
,
1995
, “
Single-Phase Liquid Jet Impingement Heat Transfer
,”
Advances in Heat Transfer
, Vol.
26
, pp.
105
–
217
.
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