Work

Influence of aluminum nanoparticles in alternative fuel: Single droplet combustion experiments and modeling

Year: 2024

Type: article

Abstract: In this work, the effect of adding aluminum nanoparticles on hydrotreated vegetable oil was investigated experimentally and numerically in terms of nanofuel stability and single droplet combustion . The purpose is to understand the phenomena related to isolated droplet combustion when metallic particles are added to a liquid biofuel . Falling droplet combustion experiments were conducted in a drop tube furnace at two different furnace temperatures (800 ∘ C and 1000 ∘ C) using a high-speed camera coupled with a high magnification lens to investigate the droplet size evolution as disruptive burning phenomena. In numerical terms, a simplified macroscopic model was developed to predict the burning behavior of isolated nanofuel droplets, considering hexadecane as a surrogate fuel for the biofuel. The results reveal that adding nanoparticles resulted in a departure from the D 2 -law. Moreover, an increase in the overall droplet burning rate was observed, and according to the numerical results, nanoparticle radiation absorption is the responsible mechanism. Micro-explosions occurred for all nanofuels, and this disruptive burning behavior substantially influenced the droplet lifetime.

Source: Fuel

DOI: 10.1016/j.fuel.2024.132850

Authors: Inês A.S. Ferrão, Tomás S.M. Mendes, Miguel A.A. Mendes, Ana. S.O.H. Moita, André R.R. Silva

Institutions: University of Beira Interior, Instituto Superior Técnico, Aeronautics and Astronautics Research Center, Instituto Superior Técnico Instituto de Engenharia Mecânica

Language: English

Topic: Advanced Combustion Engine Technologies

Subfield: Fluid Flow and Transfer Processes

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,200