Real-Time Measurements of Jet Aircraft Engine Exhaust |
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| Authors: | Fred Rogers Pat Arnott Barbara Zielinska John Sagebiel Kerry E Kelly David Wagner |
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| Institution: | 1. Division of Atmospheric Sciences, Desert Research Institute , Reno , NV , USA;2. Institute for Combustion &3. Energy Studies, University of Utah , Salt Lake City , UT , USA |
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| Abstract: | Abstract Particulate-phase exhaust properties from two different types of ground-based jet aircraft engines—high-thrust and turboshaft—were studied with real-time instruments on a portable pallet and additional time-integrated sampling devices. The real-time instruments successfully characterized rapidly changing particulate mass, light absorption, and polycyclic aromatic hydrocarbon (PAH) content. The integrated measurements included particulate-size distributions, PAH, and carbon concentrations for an entire test run (i.e., “run-integrated” measurements). In all cases, the particle-size distributions showed single modes peaking at 20–40nm diameter. Measurements of exhaust from high-thrust F404 engines showed relatively low-light absorption compared with exhaust from a turboshaft engine. Particulate-phase PAH measurements generally varied in phase with both net particulate mass and with light-absorbing particulate concentrations. Unexplained response behavior sometimes occurred with the real-time PAH analyzer, although on average the real-time and integrated PAH methods agreed within the same order of magnitude found in earlier investigations. |
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