Study of ignition and combustion characteristics of kerosene-based nanofluid fuel containing n-Al/CuO thermite

Study of ignition and combustion characteristics of kerosene-based nanofluid fuel containing n-Al/CuO thermite

•New nanofluid fuel with both better ignition and combustion properties is proposed.•The addition of CuO facilitates the exothermic process of n-Al particles.•CuO performs better than n-Al in terms of enhancing the ignition of kerosene.•The combustion rate of the n-Al/CuO(20%)/kerosene droplets is h...

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Bibliographic Details
Published in:Fuel (Guildford) Vol. 331; p. 125778
Main Authors: Lv, Xiang, Gao, Yi, Cui, Yueshuai, Wang, Chen, Zhang, Gangchui, Wang, Fang, Liu, Peijin, Ao, Wen
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-01-2023
Subjects:
Al/CuO thermite
Combustion
Kerosene
Nanofluid fuel
Nanofluid fuel
Al/CuO thermite
Combustion
Kerosene
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Summary:•New nanofluid fuel with both better ignition and combustion properties is proposed.•The addition of CuO facilitates the exothermic process of n-Al particles.•CuO performs better than n-Al in terms of enhancing the ignition of kerosene.•The combustion rate of the n-Al/CuO(20%)/kerosene droplets is highest. The ignition and combustion properties of n-Al/CuO/kerosene nanofluid fuels are examined, with a focus on the formulation effects of the n-Al/CuO nano-thermite. The DSC data shows the addition of CuO facilitates the exothermic process of n-Al particles, which then promote the n-Al/CuO/kerosene droplets to evaporate. There are two exothermic peaks on the DSC curve of n-Al/CuO (5 %) at 249.3 ℃ and 463.8 ℃, respectively. The burning of n-Al/CuO/kerosene droplets consists of four stages: ignition, d2-law combustion, vapor flame extinguishment, and agglomerate burning. During the agglomerate burning stage, n-Al/CuO (5 %)/kerosene shows the minimum ignition delay at 0.057 s and the highest emission spectral intensity. Droplet combustion conforms well to the d2-law, and the maximum combustion rate is found for n-Al/CuO (20 %)/kerosene, at 1.287 mm2 s−1. The particle size of combustion residues is uniform, and the overall appearance smoothens as the CuO content increases. A new nanofluid fuel with better ignition and combustion properties than traditional nanofluid fuels is proposed.
ISSN:0016-2361
DOI:10.1016/j.fuel.2022.125778