Research Needs Associated with Particulate Emissions at Airports (2008) / Chapter Skim
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Pages 15-18
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From page 15... ...
Smoke numbers are a required measurement during engine certification testing and have been recorded in the ICAO database since the mid 1970s. Smoke numbers, required to be reported only at the engine power for which it is maximum, are available for all large turbine engines currently employed in the commercial fleet.
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From page 16... ...
– Size distributions are typically lognormal with numberbased geometric mean diameters in the range 20 nm to 80 nm. – Nonvolatile PM is largely made up of (elemental)
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From page 17... ...
• In particular, the contribution of lubrication oil to volatile PM is poorly understood, especially as it relates to variations in engine technology and operational procedures. • There is at present limited knowledge of the dependences of volatile PM emission properties on fuel composition, including how the use of alternate fuels may impact volatile contributions.
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From page 18... ...
Applications • As for nonvolatile particles, correlations must be developed that make a connection between emissions data acquired under standard testing conditions and emissions predictions for aircraft under actual operations. • Research is currently underway to connect the local air quality model, the Emissions and Dispersion Modeling System (EDMS)
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