Abstract
In this study, a 3-D CFD simulation and laser diagnostics were developed to understand the characteristics of soot generation in a diesel diffusion flame. The recently developed RANS (Reynolds-averaged Navier-Stokes equations) hybrid combustion model (Extended Coherent Flame Model — 3 Zones, ECFM-3Z model) was used. This industrial, state-ofthe-art model of the diffusion flame is commonly used in diesel combustion models as well as for propagating (premixed) flame combustion. The simulation results were validated with measurements from a constant volume combustion chamber. The experiment revealed that soot accumulated in the chamber where the temperature decreased. Where the temperature increased rapidly, only a little soot accumulated. The temperature and soot distribution were independently examined using both the two-color method and a 3-D CFD simulation for a turbulent diesel diffusion flame.
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Abbreviations
- KL:
-
soot concentration factor
- Ta1, Ta2 :
-
temperature at the 550 nm and 750 nm wavelength
- α:
-
particle size parameter
- c1 :
-
first radiation coefficient
- c2 :
-
second radiation coefficient
- λ:
-
wave length (nm)
- ɛλ :
-
emissivity at wavelength
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Han, Y., Park, W. & Min, K. Soot and temperature distribution in a diesel diffusion flame: 3-D CFD simulation and measurement with laser diagnostics. Int.J Automot. Technol. 12, 21–28 (2011). https://doi.org/10.1007/s12239-011-0003-2
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DOI: https://doi.org/10.1007/s12239-011-0003-2