United States Department of Transportation
i
Modeling of aircraft deicing fluids deposition
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2000-06-18
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[PDF-171.80 KB]
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Alternative Title:93rd Annual Conference and Exhibition of the Air & Waste Management Association
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Abstract:Glycol deposition near aircraft during deicing operations has become an important consideration at major airports. A sampling process was used to quantify glycol deposition from deicing operations at a major international airport. The resulting data indicate that glycol deposition was different for the two types of aircraft used in this study (DC-9 and 757). The main reason appears to be the height of release. Atmospheric dispersion modeling was not performed because of the nature of the deposition mechanisms (i.e. overspray and mists). Based on the collected data, deposition modeling was conducted using three mathematical modeling approaches and the best overall model was found to be a power series. The developed model predicts downwind ground level concentrations of Type I, propylene glycol. In addition to downwind distance, wind speed was incorporated into the model by normalizing the measured deposition concentrations by their corresponding average wind speeds. Separate models were developed for each aircraft, but the engine conditions were aggregated to obtain average models.
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