Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007.
Usage of two–phase gas–liquid foam flow as a coolant
allows achieving relatively large heat transfer intensity with
smaller coolant mass flow rate. However number of foam
peculiarities complicates an application of the analytical
methods for heat transfer investigation. Presently an
experimental method of investigation was selected as the most
suitable. Due to the fact that tube bundles of different geometry
my be used in foam apparatus, the experimental investigation
of heat transfer of the in–line tube bundle with different spacing
between tubes to vertical foam flow was performed. Spacing
among the centres of the tubes across the in–line tube bundle
was 0.03 m and spacing along the bundle was 0.03 m. In other
case the spacing along the bundle was 0.06 m. Results of
investigation showed that an effect of “shadow” is slight and
heat transfer is higher for the tubes of the in–line tube bundle
with more spacing between the tubes’ centres along the bundle.
