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http://dx.doi.org/10.7316/KHNES.2013.24.6.524

A Study of Numerical Analysis on Mixed Combustion Characteristics in a Gasoline Direct Injection Engine with Premixed Hydrogen  

Bae, Jaeok (Department of Mechanical Engineering, Pusan National University)
Choi, Minsu (Department of Mechanical Engineering, Pusan National University)
Suh, Hyunuk (Department of Mechanical Engineering, Pusan National University)
Jeon, Chunghwan (School of Mechanical Engineering, Pusan National University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.24, no.6, 2013 , pp. 524-534 More about this Journal
Abstract
Gasoline direct injection(GDI) engine has a high thermal efficiency, but it has a problem to increase carbon emissions such as soot and $CO_x$. In this study, the objective is to analyze numerically a problem for adding the hydrogen during the intake stroke so as to reduce the injected amount of gasoline in GDI engines. For selection of the base model, the cylinder pressure of simulation is matched to experimental data. The numerical analysis are carried out by a CFD model with the hydrogen addition of 2%, 3% and 4% on the volume basis. In the case of 3% hydrogen addition, the injected gasoline amount is only changed to match the maximum pressure of simulation to that of the base model for additional study. It is found that the combustion temperature and pressure increase with the hydrogen addition. And NO emission also increases because of the higher combustion temperature. $CO_x$ emissions, however, are reduced due to the decrease of injected gasoline amount. Also, as the injected gasoline amount is reduced for the same hydrogen addition ratio, the gross indicated work is no significant, But NO and $CO_x$ emissions are considerably decreased. On the order hand, $CO_x$ emissions of two cases are more decreased and their gross indicated works are higher obtained than those of the base model.
Keywords
Gasoline direction injection engine; Hydrogen; Exhaust emissions; Numerical analysis; Mixed combustion; Combustion temperature and pressure;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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