Ethanol Droplet Combustion at Elevated Pressures and Enhanced Oxygen Concentrations.
Ethanol Droplet Combustion at Elevated Pressures and
Enhanced Oxygen Concentrations.
Yozgatligil, A.; Choi, M. Y.; Kazakov, A.; Dryer, F. L.;
Manzello, S. L.; Dobashi, R.
American Institute of Aeronautics and Astronautics
(AIAA) Aerospace Sciences Meeting and Exhibit, 41st.
Proceedings. January 6-9, 2003, Reno, NV, 1-7 pp, 2003.
ethanol; droplets; combustion; pressure; oxygen
In an effort to gain a better understanding of ethanol
combustion, isolated droplet experiments were performed
by varying initial droplet diameter, oxygen
concentration, and ambient pressure. Experiments were
performed at the NASA Glenn 2.2 sec. drop tower and the
JAMIC 10 sec. dropshaft. These experiments revealed that
while ethanol droplets burned in 1 atmosphere air
without soot formation, luminous radiation from soot
particles at higher pressures, with increased sooting at
higher oxygen indices were observed. The measurement of
the burning rate, soot standoff ratio and soot volume
fraction are described. These experiments provide the
first measurements of the soot volume fraction for
ethanol droplets burning under microgravity conditions.