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Contribution to the study of the generation and dynamics of particles emitted during braking

Abstract : This work focuses on a multidisciplinary problem that combines the experimental characterization of particles emitted during train braking and the numerical modeling of their transport in order to predict their dynamic behavior following their generation. These particles can present a real health risk for users who commute by public transport every day, due to their submicronic size and composition. It is important to identify their specific physical characteristics (size distribution, shape, composition, etc.) but also their dynamics (ejection speed, preferential trajectory, concentration, etc.) in order to know what users can be exposed to and possibly protect themselves from. To this end, a brake test bench has been developed to generate particles under conditions representative of a typical train route and under particular braking conditions. The characteristics of the particles obtained following analysis seem to show an influence of the braking stress conditions on the characteristics of the emitted particles. These different data are essential to predict the dynamic behavior of particles, and provide input data for the implementation of numerical models simulating particle transport in the air.
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https://hal-uphf.archives-ouvertes.fr/tel-03359442
Contributor : Aurélien Vicentini Connect in order to contact the contributor
Submitted on : Thursday, September 30, 2021 - 11:03:05 AM
Last modification on : Tuesday, October 19, 2021 - 11:38:27 AM

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  • HAL Id : tel-03359442, version 1

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Charlène Octau. Contribution to the study of the generation and dynamics of particles emitted during braking. Engineering Sciences [physics]. Université Polytechnique Hauts-de-France, 2019. English. ⟨NNT : 2019UPHF0008⟩. ⟨tel-03359442⟩

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