Temporal Evolution of Split-Injected Fuel Spray at Elevated Chamber Pressures

Gang Wu, Xinyi Zhou and Tie Li
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Gang Wu: Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China
Xinyi Zhou: State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Tie Li: State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Energies, 2019, vol. 12, issue 22, 1-23

Abstract: For reducing soot and NOx emissions, an effective method is to apply split injection strategies. In this research, characteristics of split injection were investigated by applying the pilot-main injection strategy and main-post injection strategy. The injection mass of fuel with the two strategies was measured by an in-house fuel injection rate test system based on the Bosch method. The development of spray tip and tail penetrations, as well as the evolvement of the spray angle when applying these two injection strategies, were explored by employing the high speed shadowgraphy at various injection pressures and surrounding gas densities. The results indicate the tail penetration rate of spray has no relation to the fuel injection pressure. However, the increased injection pressure causes a faster penetration development in the spray tip position. It was also found that the spray tip penetration rate of the second spray is slightly slower than that of the first spray at the beginning stage of injection, but it was significantly larger than the first one at the later stage.

Keywords: split injection; diesel engine; spray mixture formation processes; injection rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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