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Experimental and Theoretical Study of Single Iron Particle Combustion Under Low-oxygen Dilution Conditions by D. Ning; T. Hazenberg; Y. Shoshin; J.A. van Oijen; G. Finotello; L.P.H. de Goey is a Engineering article available to read on EtoBox.

What is Experimental and Theoretical Study of Single Iron Particle Combustion Under Low-oxygen Dilution Conditions about?

In the present study, a novel in situ particle sizing approach is proposed and used to measure the characteristic timescales of micron-sized iron particle combustion under low-oxygen (10-17 vol%) dilution conditions. The particle size is determined by probing the light emission intensity of a burning particle during melting, which is proportional to the cross-section area of the particle projected to the camera. Detailed descriptions of the calibration, validation, and characterization of the experimental method are elaborated. With systematic measurements, we obtain one-to-one correlations between combustion timescales and single particle diameters at various diluted oxygen concentrations. Furthermore, we formally derive a theoretical model for heterogeneous combustion of growing (iron) particles in the diffusion-limited regime. The model suggests that the diffusionlimited burn time scales with the initial particle diameter squared (i.e., a new, generalized d 2 -law). Owing to accounting for the particle growth, the newly derived model suggests a significantly (1.66 times) shorter combustion duration compared to the conventional d 2 -law for shrinking particle combustion. It turns

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Author

D. Ning; T. Hazenberg; Y. Shoshin; J.A. van Oijen; G. Finotello; L.P.H. de Goey

Publisher

Elsevier BV

Published

2024

Language

EN

Field

Engineering (Physical Sciences)