| Large eddy simulation of fuel injection and mixing process in a diesel engine | |
| Alternative Title | Large eddy simulation of fuel injection and mixing process in a diesel engine |
| Zhou Lei1; Xie MaoZhao1; Jia Ming1; Shi JunRui2 | |
| 2011 | |
| Source Publication | ACTA MECHANICA SINICA
 |
| ISSN | 0567-7718 |
| Volume | 27Issue:4Pages:519-530 |
| Abstract | The large eddy simulation (LES) approach implemented in the KIVA-3V code and based on one-equation sub-grid turbulent kinetic energy model are employed for numerical computation of diesel sprays in a constant volume vessel and in a Caterpillar 3400 series diesel engine. Computational results are compared with those obtained by an RANS (RNG k-E >) model as well as with experimental data. The sensitivity of the LES results to mesh resolution is also discussed. The results show that LES generally provides flow and spray characteristics in better agreement with experimental data than RANS; and that small-scale random vortical structures of the in-cylinder turbulent spray field can be captured by LES. Furthermore, the penetrations of fuel droplets and vapors calculated by LES are larger than the RANS result, and the sub-grid turbulent kinetic energy and sub-grid turbulent viscosity provided by the LES model are evidently less than those calculated by the RANS model. Finally, it is found that the initial swirl significantly affects the spray penetration and the distribution of fuel vapor within the combustion chamber. |
| Other Abstract | The large eddy simulation(LES)approach implemented in the KIVA-3V code and based on one-equation sub-grid turbulent kinetic energy model are employed for numerical computation of diesel sprays in a constant volume vessel and in a Caterpillar 3400 series diesel engine.Computational results are compared with those obtained by an RANS(RNG k-ε)model as well as with experimental data.The sensitivity of the LES results to mesh resolution is also discussed.The results show that LES generally provides flow and spray characteristics in better agreement with experimental data than RANS;and that small-scale random vortical structures of the in-cylinder turbulent spray field can be captured by LES.Furthermore,the penetrations of fuel droplets and vapors calculated by LES are larger than the RANS result,and the sub-grid turbulent kinetic energy and sub-grid turbulent viscosity provided by the LES model are evidently less than those calculated by the RANS model.Finally,it is found that the initial swirl significantly affects the spray penetration and the distribution of fuel vapor within the combustion chamber. |
| Keyword | SPRAY Large eddy simulation Diesel engine Fuel spray |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Natural Science Foundation of China] ; [National Basic Research Program of China] |
| CSCD ID | CSCD:4313301 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/153511 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.大连大学 2.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Zhou Lei,Xie MaoZhao,Jia Ming,et al. Large eddy simulation of fuel injection and mixing process in a diesel engine[J]. ACTA MECHANICA SINICA,2011,27(4):519-530. |
| APA | Zhou Lei,Xie MaoZhao,Jia Ming,&Shi JunRui.(2011).Large eddy simulation of fuel injection and mixing process in a diesel engine.ACTA MECHANICA SINICA,27(4),519-530. |
| MLA | Zhou Lei,et al."Large eddy simulation of fuel injection and mixing process in a diesel engine".ACTA MECHANICA SINICA 27.4(2011):519-530. |
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