The role of a split injection strategy in the mixture formation and combustion of diesel spray: A large-eddy simulation

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The role of a split injection in the mixture formation and combustion characteristics of a diesel spray in an engine-like condition is investigated. We use large-eddy simulations with finite rate chemistry in order to identify the main controlling mechanism that can potentially improve the mixture quality and reduces the combustion emissions. It is shown that the primary effect of the split injection is the reduction of the mass of the fuel-rich region where soot precursors can form.

Furthermore, we investigate the interaction between different injections and explain the effects of the first injection on the mixing and combustion of the second injection. Results show that the penetration of the second injection is faster than that of the first injection. More importantly, it is shown that the ignition delay time of the second injection is much shorter than that of the first injection. This is due to the residual effects of the ignition of the first injection which increases the local temperature and maintains a certain level of combustion some intermediates or radical which in turn boosts the ignition of the second injection.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Technical University of Denmark
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)4709-4716
TidskriftProceedings of the Combustion Institute
Volym37
Utgåva nummer4
Tidigt onlinedatum2018 nov 6
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa

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Relaterad forskningsoutput

Ahmad Hadadpour, 2020 okt 30, Division of Fluid Mechanics, Department of Energy Sciences, Lund Institute of Technology, Lund University. 206 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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