Dispersion Process of Jet Engine Exhaust Plume

概要

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To obtain the basic data for assuming the source position of atmospheric diffusion of the jet engine exhaust plume, a full scale field test was done at Chitose Airport for use in the air pollution assessment of the proposed New Kansai Airport. An engine of airbus was examined under a few operating modes. An observation net of about 100 meters wide and 25 meters high was constructed perpendicular to the jet axis, instrumented at several levels with sensord for velocity, temperature and concentration of pollutants. A model test was carried out in the laboratory to get the more widely applicable data and some of the results were compared with those of the field tests. The bending path of the jet axis by a crosswind was determined and a penetration length was estimated from the field test. The decays of maximum velocity and temperature as well as the jet spreads were determined from both field and model tests.
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