Effects of atmospheric stratification and jet position on the properties of early aircraft contrails
Pierre Saulgeot, Vincent Brion, Nicolas Bonne, Emmanuel Dormy, Laurent Jacquin
Abstract
We are interested in the dilution of exhaust gases in aircraft wakes due to the combined effect of wake, mixing, and atmospheric stratification. The aim is to predict the properties of early contrails as a function of the aircraft's main properties and the state of the atmosphere. Two-dimensional simulations of a passive scalar field representing jets under the action of wake vortices are carried out in a framework that allows a wide parametric study of aircraft and atmospheric parameters. The figure shows the evolution of vortex position (dashed lines) and ice mass (solid colors) for a B777 with a relative humidity of 140% and two atmospheric stratification conditions.