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International Heat Transfer Conference 13

ISBN Druckformat: 1-56700-226-9 (CD)
ISBN Online: 1-56700-225-0

ON THE DERIVATION OF THE BOILING CURVE IN SPRAY COOLING FROM EXPERIMENTAL TEMPERATURE-TIME HISTORIES

DOI: 10.1615/IHTC13.p28.250
page 12

Michele Ciofalo
Dipartimento di Ingegneria Nucleare, Università degli Studi di Palermo, Palermo, Italy

A. Caronia
Dipartimento di Ingegneria Nucleare, Università degli Studi di Palermo, Palermo, Italy

M. Di Liberto
Dipartimento di Ingegneria Nucleare, Università degli Studi di Palermo, Palermo, Italy

S. Puleo


Abstrakt

Hot planar aluminium targets were cooled by water sprays, and mid-plane temperature - time histories were recorded and analyzed by two alternative methods in order to obtain the boiling curve linking wall heat flux and wall temperature. In the first approach, the raw signal was filtered and an inverse heat conduction problem was solved. In the second approach, the boiling curve was parameterized by six shape parameters; for each set of parameters, a direct thermal transient problem was solved using the corresponding curve as a convective boundary condition, thus obtaining a tentative mid-plane temperature - time history to be compared with the experimental one. A minimum problem was then solved by using different algorithms to find optimum shape parameters. The relative merits of the two approaches are discussed.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION