Abstract
Single droplet combustion of aluminum nanoparticles added to a biofuel: effect of particle concentration and ambient temperature
Highlights
The combustion of liquid fuels is a complex phenomenon employed in several applications such as gas turbines, diesel, and spark-ignition
To further study the combustion of nanofuel droplets in a falling droplet method, the present work discusses the effect of particle concentration and the ambient temperature of aluminum nanoparticles suspended in aviation biofuel
A statistical study was performed to ensure that the behavior of D2 – law curves and burning rate were independent of sample size
Summary
The combustion of liquid fuels is a complex phenomenon employed in several applications such as gas turbines, diesel, and spark-ignition. Nanoparticles suspended in a liquid fuel as a potential secondary energy carrier have been recently studied due to nanotechnology development These particles offer a higher specific surface area and higher reactivity, and enhance thermophysical properties such as thermal conductivity, thermal diffusivity, viscosity, and convective heat transfer coefficients when compared with the base fuel [6]. The authors reported that at higher temperatures (750 – 850 °C), the burning rate of heptane + n-Al droplets was considerably increased compared to pure heptane droplets, regardless of particle concentration This observation was attributed to the occurrence of droplet ruptures that promote a substantially reduced burning time and total combustion time. To further study the combustion of nanofuel droplets in a falling droplet method, the present work discusses the effect of particle concentration and the ambient temperature of aluminum nanoparticles suspended in aviation biofuel. Droplet size evolution and disruptive burning phenomena at the different operating conditions will be described in detail
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