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https://dx.doi.org/10.26190/un...
Conference object . 2017
License: CC BY NC ND
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Laminar lifted flames in diesel engine conditions

Authors: Dalakoti, DK; Wehrfritz, A; Savard, B; Wang, H; Hawkes, ER;

Laminar lifted flames in diesel engine conditions

Abstract

We present results from direct numerical simulations (DNS) of laminar lifted two-dimensional (2D) n-dodecane flames at thermochemical conditions corresponding to the Engine Combustion Network (ECN) target flame known as Spray A, which canonically represents conditions in a diesel engine. Simulations were performed for three distinct inlet velocities. Results indicate that the flames present a multibrachial structure. The number of branches depends on the inlet velocity and changes from five branches for the 2.5 m/s case to four branches for the 0.6 m/s case. For the 2.5 m/s case the flame consists of a typical triple flame (consisting of a diffusion, a rich premixed, and a lean premixed flames) with additional upstream low temperature chemistry (LTC) and high temperature chemistry (HTC) branches. With decreasing inlet velocity, the triple flame moves closer to the upstream HTC branch, ultimately overtaking it for an inlet velocity of 0.6 m/s. This indicates that the triple flame propagation velocity is O(1 m/s). These results provide an important baseline to compare against a 3D turbulent Spray A flame and investigate how turbulence changes the flame structure and stabilisation mechanism.

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Australia
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Keywords

660, 620

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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