| DOI | Resolve DOI: https://doi.org/10.1016/j.atmosenv.2014.10.018 |
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| Author | Search for: Durdina, L.; Search for: Brem, B. T.; Search for: Abegglen, M.; Search for: Lobo, P.; Search for: Rindlisbacher, T.; Search for: Thomson, K. A.1; Search for: Smallwood, G. J.1; Search for: Hagen, D.E.; Search for: Sierau, B.; Search for: Wang, J. |
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| Affiliation | - National Research Council of Canada. Measurement Science and Standards
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| Format | Text, Article |
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| Subject | Aviation; Aircraft; Emissions; Particulate matter; Effective density; Black carbon |
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| Abstract | 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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| Publication date | 2014-10-12 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21272878 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | e40da252-7052-4c8c-84d0-d1d71b8f6c99 |
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| Record created | 2014-12-03 |
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| Record modified | 2020-04-22 |
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