Experimental Study Of In-line Tube Bundle Heat
Transfer In Vertical Foam Flow
Author(s)
J. Gylys, S. Sinkunas, V. Giedraitis & T. Zdankus
Abstract
Foam has an especially large inter-phase contact surface which allows using it as
a coolant. Characteristics of one type of foam – statically stable foam –
demonstrated its perfect availability for this purpose. Our previous investigations
of heat transfer processes in statically stable foam flow showed that large heat
transfer intensity may be reached at a small mass flow rate of the foam. Statically
stable foam flow is the two–phase system that has number of peculiarities:
drainage of liquid from foam, diffusive gas transfer and destruction of
inter-bubble films. Those phenomena are closely linked with each other and
make extremely complicated an application of analytic methods for the study of
heat transfer in foam. Thus experimental method of investigation was selected in
our work. Experimental investigation of the heat transfer process from the in-line
tube bundle to the vertical statically stable foam flow was performed.
Dependency of heat transfer intensity on flow parameters and on tube position in
the bundle was determined. The results of the experimental investigation are
presented in this paper.
Keywords: vertical foam flow, void fraction, heat transfer, experimental channel,
in-line tube bundle.
1 Introduction
Foams are suitable for a lot of different purposes. It can be applied for heat and
mass transfer performance as well, but usage of foam as coolant in heat
exchangers or in foam apparatus depends on capability to \“control” foam flow.
Keywords
vertical foam flow, void fraction, heat transfer, experimental channel,
in-line tube bundle.
Related Book
Other papers in this volume
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