Combustion of Miscible Binary-Fuel Droplets at High Pressure Under Microgravity
作者:
M. MIKAMI,
M. KONO,
J. SATO,
D. L. DIETRICH,
F. A. WILLIAMS,
期刊:
Combustion Science and Technology
(Taylor Available online 1993)
卷期:
Volume 90,
issue 1-4
页码: 111-123
ISSN:0010-2202
年代: 1993
DOI:10.1080/00102209308907606
出版商: Taylor & Francis Group
数据来源: Taylor
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 lime 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.
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