ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
EFFECT OF SUCTION ON IMPINGEMENT HEAT TRANSFER
Resumo
The effect of suction on average heat transfer
coefficients between an isothermal permeable plate
and impinging round jets was studied for suction
velocities in the range 0.3−0.7% of the nozzle exit average velocity. Of the two identical nozzles'
used, one generated an unconfined jet while the
impingement flow from the second nozzle was partially
confined by a 348 mm diameter plate that was
structurally an extension of the nozzle plate. Two
Reynolds numbers were used and the jet-to-plate
spacing was varied between 2 and 10 jet diameters.
For unconfined and partially confined jets, the
general effect of applying moderate suction is to
increase average heat transfer coefficients by
roughly a constant amount, the absolute increase
being larger with than without confinement.