Direct Measurement of Aircraft Engine Soot Emissions Using a Cavity-Attenuated Phase Shift (CAPS)-Based Extinction Monitor
| Autor: | Simon E. Albo, Andrew Freedman, Paul L. Kebabian, Timothy B. Onasch, Bruce E. Anderson, Richard C. Miake-Lye, Scott C. Herndon, Zhenhong Yu, Luke D. Ziemba |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Single-scattering albedo business.industry Analytical chemistry Photometer medicine.disease_cause Pollution Soot Turbofan law.invention Full width at half maximum Wavelength Optics law Extinction (optical mineralogy) medicine Environmental Chemistry General Materials Science business Absorption (electromagnetic radiation) |
| Zdroj: | Aerosol Science and Technology. 45:1319-1325 |
| ISSN: | 1521-7388 0278-6826 |
| DOI: | 10.1080/02786826.2011.592873 |
| Popis: | The optical properties of soot particles in plumes emanating from a high bypass turbofan aircraft engine (V2527) were measured at distances of 40–80 m behind the engine with a cavity-enhanced phase shift (CAPS)-based extinction monitor (known as the CAPS PMex) and a multi-angle absorption photometer, both operating at wavelength ∼630 nm. Integrated plume measurements from the two instruments were highly correlated with each other (r 2 > 0.99, N = 12) and with measured carbon dioxide emission concentrations. Ancillary measurements indicated that the soot particle volume-weighted mobility diameter distribution peaked at 60 nm with a full width at half maximum of ∼60 nm. The soot single scattering albedo determined using the absorption and extinction measurements under engine idle conditions was 0.05 ± 0.02 (where the uncertainty represents 2σ precision), in agreement with previous measurements of aircraft exhaust. The engine soot emission index (mass soot per mass fuel burned) for this particular engine, de... |
| Databáze: | OpenAIRE |
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