Droplet Trajectories in Three-Dimensional Gas Turbine Flow Fields

摘要

Much work is currently being carried out in the field of mathematical modelling of the physical and chemical processes taking place within combustion equipment to enable better combustion chamber design. One aspect of this is the numerical prediction of burning droplet trajectories in a gas flow field and in this paper a general three-dimensional particle/droplet trajectory algorithm is presented and applied to fuel sprays in gas turbine combustors. Droplet evaporation and initial heating up effects are included and trajectories are calculated within a three-dimensional computer predicted gas flow field. By injecting many droplets with initial conditions representing a particular fuel nozzle a complete fuel spray can be constructed, and this is presented graphically. The results show that in some cases the three-dimensional nature of the gas flow and the behaviour of large droplets may be expected to have a significant effect on combustor performance. (Author)