Study of spray structure under flash boiling conditions using 2phase-SLIPI

In gasoline engines, including conventional direct injection (GDI) engines and newly developed compression ignition (GCI) flash boiling of the spray occurs during throttling or low load operations. Superheated fuel that is injected into cylinder, where gas pressure lower than fuel’s saturation vapor pressure, experiences a fast phase change. Plume interaction collapse can occur as consequence boiling. The structure flashing has not been well elucidated experimentally because strong multiple-scattering effects in laser sheet imaging due to illumination out-of-laser-plane droplets. Here, structured planar (SLIPI) implemented for first time study sprays. Both front-view side-view cross-sections are examined reveal behaviors collapsing events. A comparison reconstructed 3D volume by SLIPI clearly shows advantage resolving inner collapsed spray. near-nozzle region on injector axis found be hollow, indicating bit downstream nozzle instead immediately at nozzle. This observation could obtained nor diffused back (DBI) techniques. this work, central tip observed 2D DBI image Rp = 0.1 case proven ’central jet axis’ formed radial collapse, but longer projection caused stronger adjacent plume circumferential interactions.