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 20nm to 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. Copyright 2005 Air & Waste Management Association.
Real-time measurements of jet aircraft engine exhaust
Journal of the Air and Waste Management Association ; 55 , 5 ; 583-593
2005
11 Seiten, 20 Quellen
Article (Journal)
English
Aircraft engine exhaust measurement
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