Abstract

A software package, which maps the jet plume zones for a jet aircraft during airport ground operation, has been developed. The method generates an airport plume zone map by predicting plume velocity contours (for a selected jet plume velocity level, e.g., 35 mph) as a function of the aircraft geometry and engine power setting. The velocity contours are then superimposed on a predigitized airport map. A standard normalized velocity contour plot, which is unique to each airplane configuration, is used to quickly determine the plume velocity contour for an engine power setting and a computer graphics program is used to display an airport plume zone map on the computer screen. The method is general and is applicable to any airplane configuration. The purpose of this article is to introduce an airport plume zone mapping tool to the airplane design and operation groups. Nomenclature A = total cross-sectional area of engine nozzles D = diameter of a round jet T = thrust setting for a single engine U = jet velocity p = ambient density of air

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