| DOI | Trouver le DOI : https://doi.org/10.1016/j.atmosenv.2014.10.018 |
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| Auteur | Rechercher : Durdina, L.; Rechercher : Brem, B. T.; Rechercher : Abegglen, M.; Rechercher : Lobo, P.; Rechercher : Rindlisbacher, T.; Rechercher : Thomson, K. A.1; Rechercher : Smallwood, G. J.1; Rechercher : Hagen, D.E.; Rechercher : Sierau, B.; Rechercher : Wang, J. |
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| Affiliation | - Conseil national de recherches du Canada. Science des mesures et étalons
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| Format | Texte, Article |
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| Sujet | Aviation; Aircraft; Emissions; Particulate matter; Effective density; Black carbon |
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| Résumé | Inventories of particulate matter (PM) emissions from civil aviation and air quality models need to be validated using up-to-date measurement data corrected for sampling artifacts. We compared the measured black carbon (BC) mass and the total PM mass determined from particle size distributions (PSD) and effective density for a commercial turbofan engine CFM56-7B26/3. The effective density was then used to calculate the PM mass losses in the sampling system. The effective density was determined using a differential mobility analyzer and a centrifugal particle mass analyzer, and increased from engine idle to take-off by up to 60%. The determined mass-mobility exponents ranged from 2.37 to 2.64. The mean effective density determined by weighting the effective density distributions by PM volume was within 10% of the unit density (1000kg/m3) that is widely assumed in aircraft PM studies. We found ratios close to unity between the PM mass determined by the integrated PSD method and the real-time BC mass measurements. The integrated PSD method achieved higher precision at ultra-low PM concentrations at which current mass instruments reach their detection limit. The line loss model predicted ~60% PM mass loss at engine idle, decreasing to ~27% at high thrust. Replacing the effective density distributions with unit density lead to comparable estimates that were within 20% and 5% at engine idle and high thrust, respectively. These results could be used for the development of a robust method for sampling loss correction of the future PM emissions database from commercial aircraft engines. |
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| Date de publication | 2014-10-12 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21272878 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | e40da252-7052-4c8c-84d0-d1d71b8f6c99 |
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| Enregistrement créé | 2014-12-03 |
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| Enregistrement modifié | 2020-04-22 |
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