EVAPORATION RATE OF FREE PARAFFIN HYDROCARBON DROPLETS IN A HIGH-TEMPERATURE AND HIGH-PRESSURE GAS-STREAM

被引:5
作者
CHUNG, SS [1 ]
KAWAGUCHI, O [1 ]
机构
[1] KEIO UNIV,FAC SCI & TECHNOL,DEPT MECH ENGN,KOHOKU KU,YOKOHAMA,KANAGAWA 223,JAPAN
来源
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING | 1995年 / 38卷 / 01期
关键词
DROPLET; SPRAY; EVAPORATION; SPRAY COMBUSTION; HIGH TEMPERATURE AND HIGH PRESSURE; HYDROCARBON;
D O I
10.1299/jsmeb.38.121
中图分类号
O414.1 [热力学];
学科分类号
摘要
A series of evaporation rate constants has been obtained for fine free droplets of paraffin hydrocarbons, n-heptane, iso-octane and n-undecane 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 droplet diameter a fine droplet stream generated by an electrically controlled 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-heptane and n-undecane was also examined in terms of the evaporation rate constant, and the evaporation history, the so-called D2-t relation, displays a bending line with two separate straight lines of respective constituents.
引用
收藏
页码:121 / 128
页数:8
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