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Advisor(s)
Abstract(s)
The present work evaluates the evaporation and combustion of single droplets of a biofuel (HVO) added with aluminum nanoparticles (n-Al). Tests were carried out in a drop tube furnace that allows the control of the wall temperature and oxygen concentration, in which the single droplets were injected downward at the top of the furnace. Droplets with a diameter of 250 μm were generated from a commercial droplet generator. Experiments were conducted with two particle sizes (40 nm and 70 nm) and two particle concentrations (0.5 wt.% and 1.0 wt.%). The effect of the size and concentration of the aluminum nanoparticles added to the biofuel was studied at 1100 °C. Detailed measurements, namely the temporal evolution of the droplet size and burning rate, were analyzed post-processing images. The combustion of aluminum nanoparticles added to a biofuel reveals micro-explosions, a disruptive burning phenomenon that appears at the end of the droplet lifetime, which is greatly influenced by the particle concentration.
Description
Keywords
Alternative fuel Drop tube furnace experiments Droplet combustion Micro-explosions Nanofuels
Citation
I. Ferrão, A. Silva, A. S. Moita, M. Mendes, M. Costa, "Single droplet combustion of aluminum nanoparticles added to a biofuel", ILASS-Asia-2020, 21st Annual Conference on Liquid Atomization and Spray Systems - Asia, Zhenjiang, China, 23-26 october, 2020
Publisher
ILASS - Asia, Institute for Liquid Atomization and Spray Systems