INSIGHT INTO JET-TO-JET INTERACTIONS UNDER FLASH-BOILING CONDITIONS USING A MULTI-HOLE INJECTOR WITH WIDE ENVELOP SPRAY ANGLE
Source abstract
Abstract
The flash-boiling spray collapse has been widely investigated for multi-hole Gasoline Direct Injection (GDI) injectors and no consensus has been achieved on the collapse process and its mechanism. Herein, the flash-boiling spray behaviors were carefully examined using a multi-hole GDI injector with a larger envelop angle to better observe the jet-to-jet interactions from two view directions. From the front view, the spray collapse occurred as superheat degree (Rp) increased while the sprays under relatively high ambient pressures showed stronger collapse given similar Rp. From the bottom view, the adjacent jets with the closest hole-to-hole distance firstly merged with the increase in Rp, then more jets with relatively larger distance started to merge and finally the sprays collapsed as Rp further increased. This sort of spatially orderly collapse with the increase in Rp occurred at the beginning of injection and near-nozzle region, contributing to the spray collapse under flash-boiling conditions. It was also found that the merged jets could attract the adjacent jets to some extent with the spray developing. This attraction occurred in the far field and influenced the spray morphology, but had limited role in the spray collapse. The spatially orderly collapse in such a nozzle configuration delivers a more general understanding on the flash-boiling induced collapse and it will be of help in injector design optimization.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Combustion Engine Technologies · Combustion and flame dynamics · Heat transfer and supercritical fluids
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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