Large eddy simulation of fuel injection and mixing process in a diesel engine

IMR OpenIR

	Large eddy simulation of fuel injection and mixing process in a diesel engine
其他题名	Large eddy simulation of fuel injection and mixing process in a diesel engine
	Zhou Lei 1; Xie MaoZhao 1; Jia Ming 1; Shi JunRui 2
	2011
发表期刊	ACTA MECHANICA SINICA
ISSN	0567-7718
卷号	27 期号:4 页码:519-530
摘要	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.
其他摘要	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.
关键词	SPRAY Large eddy simulation Diesel engine Fuel spray
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [National Basic Research Program of China]
CSCD记录号	CSCD:4313301
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/153511
专题	中国科学院金属研究所
作者单位	1.大连大学 2.中国科学院金属研究所
推荐引用方式 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.