Image acquisition was repeated at different delays from ET start, in order to include in the analysis the drops present in the spray leading edge, in the main spray region
, and in the spray tail.
As long as the flame zone is smaller than the maximum spray region, liquid pilot fuel has an influence on the overall rate of heat release.
Generally, entrainment parameter can be used to tune the intensity of the initial phase of combustion which is governed by the premixed combustion in the spray region, as well as the ratio between spray combustion and flame propagation.
As shown in Figure 1, the wall impingement spray mechanism injected into the tail-pipe can be classified into free spray region
, impingement spray region
, evaporation of liquid film and separation droplets region, and urea solution dispersion region.
Vapor phase concentrated in the center part of the spray region
, which was surrounded by the liquid phase.
The vapor is mainly distributed in the spray region
without extension to adjacent region and the vapor concentration is highest at spray tip.
In the vaporized fuel spray region, the total extinction is dominated by vapor absorption, which implies that the differences in the droplets' optical thickness at the two wavelengths have little effect on the measured vapor concentrations.
The fuel composition in a fully vaporized spray region is homogenous, i.e.
It can clearly be seen that there is wider span in the upstream spray region (i.e.
According to the Colombian government, the Colombian National Police does not spray regions
that are identified as present or future alternative development recipients.