DYNAMICS OF AIRCRAFT EXHAUST PLUMES IN THE JET-REGIME

A computational model describing the two-dimensional, turbulent mixing of a single jet of exhaust gas from aircraft engines with the ambient atmosphere is presented. The underlying assumptions and governing equ ations are examined and supplemented by a discussion of analytical sol utions. As an application, the jet dynamics of a B747-400 aircraft eng ine in cruise and its dependence on key parameters is investigated in detail. The computer code for this dynamical model is computationally fast and can easily be coupled to complex chemical and microphysical m odels in order to perform comprehensive studies of atmospheric effects from aircraft exhaust emissions in the jet regime.