Measurement of Gaseous HAP Emissions from Idling Aircraft as a Function of Engine and Ambient Conditions (2012) / Chapter Skim
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An important observation drawn from this work and previous measurements is that trends with near-idle engine state and ambient temperature in one volatile organic compound also apply to the compounds in the other classifications. • A hazardous air pollutant (HAP)
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This project will attempt to "see through" whatever variability is present in the key data trends and develop a simple methodology that can be used to estimate HAP emissions at different ambient temperatures and in-use fuel flow rates at the airport. Although every airport is unique and universal statements are not appropriate, several airport emission inventories report that the greatest source of HAP emissions is idling jet engines (Wood et al.
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are noted with a number. For example, in this project, the effect of ambient temperature on the emissions of various HAP species would schematically manifest itself as a perturbation to T2, the temperature of the gas coming into the engine.
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The BFFM2 approach is significantly more general and estimates emissions performance using only the engine databank values. The comparisons of NOx emissions predictions based on BFFM2 with those based on the P3T3 method are excellent for a wide variety of engines operating at different ambient temperatures, pressures (altitude)
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