Accession Number : ADA557370


Title :   Measurement and Modeling of Volatile Particle Emissions from Military Aircraft


Descriptive Note : Final rept. Jun 2008-Sep 2011


Corporate Author : CARNEGIE INST OF TECH PITTSBURGH PA


Personal Author(s) : Robinson, Allen L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a557370.pdf


Report Date : Oct 2011


Pagination or Media Count : 0


Abstract : Experiments were performed to characterize the atmospheric evolution of volatile particulate matter emissions from military aircraft engines including CFM56-family and T63 gas-turbine engines. The data were used to develop parameterizations for use in chemical transport models to predict the contribution of aircraft to ambient fine particulate matter. A significant fraction of the particulate matter emissions is semivolatile at atmospheric conditions. Therefore, a traditional emissions factor cannot be used to represent military aircraft particulate matter emissions in inventories and models. Instead, one must measure the total emissions rate of semivolatile species and the volatility distribution of the emissions. The smog chamber experiments demonstrated that photo-oxidation creates substantial secondary particulate matter, greatly exceeding (by as much as a factor of 60) the direct particulate emissions after an hour or less of aging at typical summertime conditions. Therefore secondary particulate matter production must be accounted for in order to assess the contribution of military aircraft emissions to urban and regional air pollution.


Descriptors :   *EMISSION , *MILITARY AIRCRAFT , AEROSOLS , AIR POLLUTION , AIRCRAFT ENGINES , ATMOSPHERIC CHEMISTRY , PARTICULATES , VOLATILITY


Subject Categories : Aircraft
      Environmental Health and Safety


Distribution Statement : APPROVED FOR PUBLIC RELEASE