Abstract
Investigation of Split Flash Boiling Injection Schemes in a constant volume chamber and an optical GDI engine under lean combustion condition
Highlights
The use of flash boiling fuel atomization is considered a viable path in further improving the combustion efficiency and reduce emission for practical combustors[1]. Such a capability is quite desirable under increasingly stringent regulations for applications such as gasoline direct injection (GDI) engine powertrains
There have been many investigations on spray morphologies and characteristics in constant volume chamber tests, and the results have demonstrated that flash boiling atomization is able to improve fuel-air mixing[2], reducing droplet size [3], reducing spray-wall impingement fuel film formation [4, 5], etc
The conclusions are listed as follows: 1. The air entrainment of flash boiling spray plume is much stronger compared with subcooled spray plume
Summary
The use of flash boiling fuel atomization is considered a viable path in further improving the combustion efficiency and reduce emission for practical combustors[1]. Flash boiling atomization; Gasoline direct injection engines; Optical engine; Split injection Kabasin et al [12] used an integrated heated fuel injector for ethanol direct injection engines, and it was found that flash boiling effects notably improved spray breakup and cold-start performance. The work of Yang et al explored flash boiling spray applications under engine cold-start conditions[2, 15, 16].
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