Ss. Chung et O. Kawaguchi, EVAPORATION RATE OF FREE PARAFFIN HYDROCARBON DROPLETS IN A HIGH-TEMPERATURE AND HIGH-PRESSURE GAS-STREAM, JSME international journal. Series B, fluids and thermal engineering, 38(1), 1995, pp. 121-128
A series of evaporation rate constants has been obtained for fine free
droplets of paraffin hydrocarbons, n-heptane, iso-octane and n-undeca
ne in the range of 623 to 1 023 K in temperature and 0.1 to 0.5 MPa in
pressure as the ambient conditions. To obtain the time histories of d
roplet diameter a fine droplet stream generated by an electrically con
trolled piezoelectric element was synchronized with a flash light, and
enlarged droplet images were taken on a still camera. The evaporation
rate constant increases with ambient pressure and temperature and is
expressed by empirical equations. A mixed-hydrocarbon droplet of n-hep
tane and n-undecane was also examined in terms of the evaporation rate
constant, and the evaporation history, the so-called D2-t relation, d
isplays a bending line with two separate straight lines of respective
constituents.