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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology KSME International Journal Vol.18 No.5
발행연도
2004.5
수록면
865 - 876 (12page)

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A new concept of reduced quasi-dimensional combustion model for a direct injection diesel engine is developed based on the previously developed quasi-dimensional multi-zone model to improve the computatonal efficiency. In the reduced model,spray penetration and air entrainment are calculated for a number of zones within the spray while three zones with aggregated spray zone concept are used for the calculation of spray combustion and emission formation processes. It is also assumed that liquid phase fuel appears only near the nozzle exit dring the breakup period and that spray vaporization is immediate in order to reduce the computational time. Validation of the reduced model with experimental data demonstrated that the new model can predict engine performance and NO and soot emissions reasonably well compared to the original model. With the new concept of reduced model, computational efficiency is significantly improved as much as 200 times compared to the original model.

목차

Abstract

1.Introduction

2.Reduced Quasi-Dimensional Combustion Model

3.Sub-Models

4.Results and Discussion

5.Conclusions

Acknowledgment

References

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