Js. Sitter et al., TERRESTRIAL AND MICROGRAVITY POOL BOILING HEAT-TRANSFER FROM A WIRE IN AN ACOUSTIC FIELD, International journal of heat and mass transfer, 41(14), 1998, pp. 2143-2155
Pool boiling heat transfer experiments from a platinum wire healer in
FC-72 liquid were conducted under terrestrial and microgravity conditi
ons, both with and without the presence of a high intensity acoustic s
tanding wave within the fluid. The purpose of this research was to det
ermine the effects of an acoustic sound field on nucleate pool boiling
in both terrestrial gravity and microgravity. The platinum wire heate
r was used as a constant heat flux source and as a thermometer. The ef
fects of acoustics on heat transfer were measured by the change in the
average surface temperature of the heater. In terrestrial gravity a p
artial boiling curve was established with and without acoustics. In ge
neral, it was found that both the natural convection and boiling heat
transfer rates were increased with the presence of an acoustic standin
g wave in terrestrial gravity. The highest heat transfer augmentation
was registered when the heater wire was placed at the acoustic pressur
e antinode. In microgravity, the acoustic force was shown to be a prom
ising means in maintaining nucleate boiling. (C) 1998 Elsevier Science
Ltd. All rights reserved.