In the present study a method for estimating local heat transfer distributions of internal cooling systems is described. Experimental data and finite element analysis are applied for this method. The investigations considered in this paper are based on experiments performed on a two-pass cooling channel connected by a 180 deg bend with internal rib arrangements. The solid walls of the cooling channels are made of a metallic material. During the experiment the temperature response of the outer surface induced by heated internal flow is recorded by infrared thermography. The internal heat transfer distribution is obtained using an optimization routine. For each loop of the optimization a transient thermal simulation of the solid body is performed applying the boundary and inlet conditions of the experiment. The temperature of the outer surface calculated by the finite element simulation is compared to the measured temperature recorded by infrared thermography. The difference of these temperature distributions is minimized by adapting the distribution of the internal heat transfer coefficients. The adaptation is conducted on single elements of the inner surface and will be presented in detail in the paper. This approach allows us to achieve a high resolution in heat transfer while minimizing the required iterations. The combination of experimental data and finite element analysis allows us to consider three-dimensional conduction effects in the solid and the streamwise fluid temperature development. Results are compared to literature data.

References

References
1.
Webb
,
R. L.
,
1994
,
Principles of Enhanced Heat Transfer
,
John Wiley and Sons
,
New York
.
2.
Han
,
J. C.
,
Dutta
,
S.
, and
Ekkad
,
S. V.
,
2000
,
Gas Turbine Heat Transfer and Cooling Technology
,
Taylor & Francis
,
New York
.
3.
Han
,
J. C.
, and
Huh
,
M.
,
2010
, “
Recent Studies in Turbine Blade Internal Cooling
,”
Heat Transfer Res.
,
41
(
8
), pp.
803
828
.10.1615/HeatTransRes.v41.i8.30
4.
von Wolfersdorf
,
J.
, and
Weigand
,
B.
,
2010
, “
Turbine Blade Internal Cooling—Selected Experimental Approaches
,”
Internal Cooling in Turbomachinery
,
F.
Coletti
and
T.
Arts
, eds.,
von Karman Institute for Fluid Dynamics
, Rhode Saint Genese, Belgium.
5.
Coletti
,
F.
,
Scialanga
,
M.
, and
Arts
,
T.
,
2012
, “
Experimental Investigation of Conjugate Heat Transfer in a Rib-Roughened Trailing Edge Channel With Crossing Jets
,”
ASME J. Turbomach.
,
134
(
4
), p.
041016
.10.1115/1.4003727
6.
Lin
,
M. J.
, and
Wang
,
T.
,
2002
, “
A Transient Liquid Crystal Method Using a 3-D Inverse Transient Conduction Scheme
,”
Int. J. Heat Mass Transfer
,
45
(
17
), pp.
3491
3501
.10.1016/S0017-9310(02)00073-X
7.
Nirmalan
,
N. V.
,
Bunker
,
R. S.
, and
Hedlund
,
C. R.
,
2003
, “
The Measurement of Full-Surface Internal Heat Transfer Coefficients for Turbine Airfoils Using a Nondestructive Thermal Inertia Technique
,”
ASME J. Turbomach.
,
125
(
1
), pp.
83
89
.10.1115/1.1515798
8.
Incopera
,
F. P.
, and
DeWitt
,
D. P.
,
1996
,
Fundamentals of Heat and Mass Transfer
,
John Wiley and Sons
,
New York
.
9.
Özisik
,
M. N.
,
1985
,
Heat Transfer: A Basic Approach
,
McGraw-Hill
,
Singapore
.
10.
Bunker
,
R. S.
,
2004
, “
Latticework (Vortex) Cooling Effectiveness Part 1: Stationary Channel Experiments
,”
ASME
Paper No. GT2004-54157.10.1115/GT2004-54157
11.
Heidrich
,
P.
,
von Wolfersdorf
,
J.
, and
Schnieder
,
M.
,
2008
, “
Experimental Study of Internal Heat Transfer Coefficients in a Rectangular, Ribbed Channel Using a Non-Invasive, Non-Destructive, Transient Inverse Method
,”
ASME
Paper No. GT2008-50297.10.1115/GT2008-50297
12.
Egger
,
C.
,
von Wolfersdorf
,
J.
, and
Schnieder
,
M.
,
2013
, “
Heat Transfer Measurements in an Internal Cooling System Using a Transient Technique With Infrared Thermography
,”
ASME J. Turbomach.
,
135
(
4
), p.
041012
.10.1115/1.4007625
13.
Schueler
,
M.
,
Neumann
,
S. O.
, and
Weigand
,
B.
,
2009
, “
Pressure Loss and Heat Transfer in a 180 Deg Bend of a Ribbed Two-Pass Internal Cooling Channel With Engine-Similar Cross Sections, Part 1: Experimental Investigations
,”
8th European Conference on Turbomachinery
, Fluid Dynamics and Thermodynamics (ETC8), Graz, Austria, March 23–27, pp.
513
523
.
14.
Ungan
,
N.
,
2012
, “
Conjugate Numerical Heat Transfer Simulation of an Industrially Relevant Two-Pass Cooling Channel Connected by a 180 Deg Bend
,” Diploma thesis, University of Stuttgart, Stuttgart, Germany.
15.
Dittus
,
F. W.
, and
Boelter
,
L. M. K.
,
1930
, “
Heat Transfer in Automobile Radiators of the Tubular Type
,”
University of California Publications in Engineering
, Vol. II, University of California Press, Berkley, CA, pp. 443–461.
16.
Flir, 2010, Flir: SC7000 User Manual, DC019U-L ed.
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