| SOOT AND TEMPERATURE DISTRIBUTION IN A DIESEL DIFFUSION FLAME: 3-D CFD SIMULATION AND MEASUREMENT WITH LASER DIAGNOSTICS |
| Y. HAN, W. PARK, K. MIN |
| Seoul National University |
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| ABSTRACT |
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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. |
| Key Words:
Constant volume vessel, Two-color Method, KL factor, ECFM-3Z, Soot, Diffusion flame |
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