ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
FLOW THROUGH AN ARRAY OF INTERRUPTED, PARALLEL PLATES
Resumo
The flow through a two-dimensional array of
parallel plates aligned with the flow direction
was studied to gain insight into the processes responsible for heat transfer augmentation in interrupted
plate heat exchangers. A periodic, two-dimensional
flow between plates in the array was observed which is similar in character to that seen between isolated plate pairs. Evidence of this periodic flow is also contained in the spectra of the flow noise emitted from a closely packed array tested in air. Pressure drop measurements
suggest that this periodic, unsteady flow between
plates leads to a turbulent-like friction characteristic
and that small streamwise gaps between plates can result in considerable depression of the critical Reynolds number for transition from laminar-like to turbulent-like behavior in a plate array.