Heat transfer from a perforated, sinusoidal plate with suction to air flowing over the plate, perpendicular to the corrugations, has been studied numerically and experimentally. This study used a numerical model, validated by wind tunnel tests and hot wire anemometer/resistance thermometer measurements, to determine the heat loss to the air stream over the plate as a function of wind speed, suction velocity, and plate geometry. Both attached and separated flow regimes were observed, and the criterion for flow attachment was determined to be Correlations were developed for heat transfer to the air stream for each flow regime. For attached flow, the heat transfer can be represented as For separated flow, the following correlation applies:
Issue Section:Technical Papers
Keywords:solar absorber-convertors, heat losses, wind, heat transfer, anemometry, resistance thermometers, thermal variables measurement, external flows, flow separation
Schlichting, H., 1979, Boundary Layer Theory, Seventh Edition, McGraw-Hill Book Co., New York, pp. 392–393.
Iglisch, R., 1944, “Exact Calculation of Laminar Boundary Layer in Longitudinal Flow Over a Flat Plate with Homogeneous Suction,” Tech. Memo. No. 1205, National Advisory Committee for Aeronautics, Washington, D.C.
A. D., and
The Three-Dimensional Laminar Asymptotic Boundary Layer with Suction,”
J. Eng. Math.,
Arpaci, V. S., and Larsen, P. S., 1984, Convection Heat Transfer, Prentice-Hall, Englewood Cliffs, NJ, pp. 160–169.
Kutscher, C. F., 1992, “An Investigation of Heat Transfer for Air Flow Through Low Porosity Perforated Plates,” Ph.D. thesis, Univ. of Colorado, Dept. of Mech. Eng.
C. B., and
Unglazed Transpired Solar Collectors: Heat Loss Theory,”
ASME J. Sol. Energy Eng.,
Nonlinear Analysis of Laminar Boundary Layer Flow Over a Periodic Wavy Surface,”
Nonlinear Analysis of Laminar Boundary Layer Flow Over a Periodic Wavy Surface—Part II: Long Waves,”
Patankar, S. V., 1980, Numerical Heat Transfer and Fluid Flow, Hemisphere Publishing Corp., New York.
Conserval Engineering, Inc., Toronto, Canada.
Hollick, J., 1994, private communication, Conserval Engineering, Inc., Toronto.
R. T., and
Turbulent Flow with Wavy Permeable Boundaries,”
J. Fluid Mech.,
58, Pt 2, pp.
Copyright © 2002