Study of spray structure from non-flash to flash boiling conditions with space-time tomography

Flash boiling and plume interaction are common phenomena occurring in gasoline direct injection (GDI) spray at throttling low load engine conditions. Combined with optical engines low-pressure vessels, several techniques, such as backlight imaging, Mie-scattering, laser sheet imaging have been employed to study the flash morphology. However, 2D images resulting from these techniques (projection views or planar imaging), 3D information is lost. Those methods then incapable of providing satisfactory information, especially for multi-plume spray, since not a event. This paper reports implementation 4D tomographic reconstruction method multi-view diffused back illumination (DBI) images, used first time characterization. cost-effective time-saving simple experimental setup clarifies structure fuel trajectory change non-flashing conditions flare conditions, quantifies characteristics individual plumes non-flash