This title appears in the Scientific Report :
2024
Please use the identifier:
http://dx.doi.org/10.1016/j.firesaf.2024.104110 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2024-01606 in citations.
Extinction coefficients from aerosol measurements
Extinction coefficients from aerosol measurements
In this contribution, we develop a model that describes light extinction in the presence of arbitrary aerosols. In doing so, we take advantage of the fact that during measurements with the ELPI+-system, aerosol particles of any shape are internally mapped to spherical surrogates. The developed model...
Saved in:
Personal Name(s): | Gnendiger, Christoph |
---|---|
Schultze, Thorsten / Börger, Kristian / Belt, Alexander / Arnold, Lukas (Corresponding author) | |
Contributing Institute: |
Zivile Sicherheitsforschung; IAS-7 |
Published in: | Fire safety journal, 146 (2024) S. 104110 - |
Imprint: |
New York, NY [u.a.]
Elsevier
2024
|
DOI: |
10.1016/j.firesaf.2024.104110 |
DOI: |
10.34734/FZJ-2024-01606 |
Document Type: |
Journal Article |
Research Program: |
Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2024-01606 in citations.
In this contribution, we develop a model that describes light extinction in the presence of arbitrary aerosols. In doing so, we take advantage of the fact that during measurements with the ELPI+-system, aerosol particles of any shape are internally mapped to spherical surrogates. The developed model is particularly simple and depends on only a few parameters, namely on densities and refractive indices of the measured aerosol particles. As proof of principle, the model is in first applications used to determine extinction coefficients and mass-specific extinction for an infrared light source with a peak wave length of 880 nm. Detailed studies concentrate on two aerosols exemplary for characteristic values of the input parameters: a paraffin aerosol in a bench-scale setup and soot from a flaming n-heptane fire in a room-scale setup (test fire TF5 according to EN54). As main results, we find values for mass-specific extinction that are different in the considered cases. Moreover, obtained results differ in part more than a factor of three from literature values typically used in practical applications. We explicitly assess reasons for deviations found and finally propose a simple way how future light-extinction studies can be performed comparatively easily using the ELPI+-system. |