Algorithms for improving accuracy of spray simulation
Algorithms for improving accuracy of spray simulation
复制标题
提高喷雾模拟精度的算法
DOI：
10.1007/s11434-007-0155-7
复制
发表时间：
2007-04
期刊：
影响因子：
--
通讯作者：
Zhang HuiYa
中科院分区：
文献类型：
--
作者：
Zhang YuSheng;Xu Bo;Xia HeLin;Zhang HuiYa
Fuel spray is the pivotal process of direct injection engine combustion. The accuracy of spray simulation determines the reliability of combustion calculation. However, the traditional techniques of spray simulation in KIVA and commercial CFD codes are very susceptible to grid resolution. As a consequence, predicted engine performance and emission can depend on the computational mesh. The two main causes of this problem are the droplet collision algorithm and coupling between gas and liquid phases. In order to improve the accuracy of spray simulation, the original KIVA code is modified using the cross mesh droplet collision (CMC) algorithm and gas phase velocity interpolation algorithm. In the constant volume apparatus and D.I. diesel engine, the improvements of the modified KIVA code in spray simulation accuracy are checked from spray structure, predicted average drop size and spray tip penetration, respectively. The results show a dramatic decrease in grid dependency. With these changes, the distorted phenomenon of spray structure is vanished. The uncertainty in predicted average drop size is reduced from 30 to 5 μm in constant volume apparatus calculation, and the uncertainty is further reduced to 2 μm in an engine simulation. The predicted spray tip penetrations in engine simulation also have better consistency in medium and fine meshes.
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DOI：
10.4271/2000-01-1893
发表时间：
2000-06
期刊：
SAE transactions
影响因子：
--
作者：
P. Béard;J. Duclos;C. Habchi;G. Bruneaux;K. Mokaddem;T. Baritaud
通讯作者：
P. Béard;J. Duclos;C. Habchi;G. Bruneaux;K. Mokaddem;T. Baritaud
DOI：
10.3929/ethz-a-004582366
发表时间：
2001
期刊：
--
影响因子：
--
作者：
S. Hieber
通讯作者：
S. Hieber
DOI：
10.4271/2003-01-0008
发表时间：
2003-03
期刊：
SAE transactions
影响因子：
--
作者：
P. Béard;O. Colin;M. Miche
通讯作者：
P. Béard;O. Colin;M. Miche
DOI：
10.4271/2002-01-1113
发表时间：
2002-03
期刊：
--
影响因子：
--
作者：
D. Schmidt;P. Senecal
通讯作者：
D. Schmidt;P. Senecal
DOI：
--
发表时间：
2001
期刊：
--
影响因子：
--
作者：
P. Nordin
通讯作者：
P. Nordin