COMBUSTION OF MISCIBLE BINARY-FUEL DROPLETS AT HIGH-PRESSURE UNDER MICROGRAVITY

被引:27
作者
MIKAMI, M
KONO, M
SATO, J
DIETRICH, DL
WILLIAMS, FA
机构
[1] UNIV TOKYO,DEPT AERONAUT,BUNKYO KU,TOKYO 113,JAPAN
[2] ISHIKAWAJIMA HARIMA HEAVY IND CO LTD,RES INST,KOTO KU,TOKYO,JAPAN
[3] SVERDRUP TECHNOL INC,NASA,LEWIS RES CTR,CLEVELAND,OH 44135
[4] UNIV CALIF SAN DIEGO,DEPT APPL MECH & ENGN SCI,CTR ENERGY & COMBUST RES,LA JOLLA,CA 92093
关键词
D O I
10.1080/00102209308907606
中图分类号
O414.1 [热力学];
学科分类号
摘要
The objective of this research is to study near-critical and super-critical combustion of droplets consisting of binary fuel mixtures. Experimental results are reported on the burning of fiber-supported droplets of mixtures of n-heptane and n-hexadecane, initially about 1 mm in diameter, under free-fall microgravity conditions. The ambient pressures range up to 3.0 MPa, extending above the critical pressure of both fuels, in room-temperature nitrogen-oxygen atmospheres having oxygen mole fractions of 0.12 and 0.13. Three-stage burning of the binary fuel droplets is observed, and the onset time of the second stage is compared with the predictions of an existing theory. Experimental evidence of thermo-capillary and/or diffuso-capillary convection during the droplet burning is obtained. The results contribute to improving understanding of binary-fuel droplet-combustion processes at high pressures.
引用
收藏
页码:111 / 123
页数:13
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