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Particulate Emissions from in-use Commercial Aircraft.
- Source :
-
Aerosol Science & Technology . Aug2005, Vol. 39 Issue 8, p799-809. 11p. - Publication Year :
- 2005
-
Abstract
- Particulate emission indices (per kg fuel) have been determined by sampling the advected plumes of in-use commercial aircraft at two different airports using a novel approach. Differences are observed in the number, magnitude, and composition of the particle emissions between idle and take-off. At the first airport, Electrical Low Pressure Impactor (ELPI) data indicate that number based emission indices (EI n ) vary by an order of magnitude for take-off plumes from different aircraft. Additionally, EI n values for idle plumes are greater than take-off. At the second airport, EI n values derived from condensation particle counter (CPC) measurements span ∼⃒ an order of magnitude (3–50 × 10 15 particles per kg fuel). The median values of the idle and take-off plumes were 1.8 × 10 16 and 7.6 × 10 15 particles per kg fuel, respectively. For take-off plumes, the magnitude of the particulate emission index is not correlated with NO x at either airport. The surface properties of the particulate emissions in take-off and idle plumes differ significantly as measured by diffusion charging (DC) and photoelectric aerosol sensor (PAS) instruments. Results indicate that take-off plumes are characterized by particles with photoelectric-active surfaces, presumably elemental carbon, whereas idle plumes are composed of non-photoelectric-active constituents and coated soot particles. Measurements of the particulate size distribution (ELPI) show evidence for two modes, one at ∼⃒ 90 nm aerodynamic diameter and a second mode at or below the instrument cutoff ( [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02786826
- Volume :
- 39
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Aerosol Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 18021563
- Full Text :
- https://doi.org/10.1080/02786820500247363