Mr. Yasumasa Suzuki Profile

Yasumasa Suzuki

at AIST

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Proceedings Article | 6 August 2014 Paper

Estimation of equivalence ratio distribution in diesel spray using a computational fluid dynamics

Yasumasa Suzuki, Taku Tsujimura, Jin Kusaka

Proceedings Volume 9232, 923205 (2014) https://doi.org/10.1117/12.2063644

KEYWORDS: Liquids, 3D modeling, Combustion, Visualization, Computational fluid dynamics, Light scattering, Terbium, Temperature metrology, Computer simulations, Scattering

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It is important to understand the mechanism of mixing and atomization of the diesel spray. In addition, the computational prediction of mixing behavior and internal structure of a diesel spray is expected to promote the further understanding about a diesel spray and development of the diesel engine including devices for fuel injection. In this study, we predicted the formation of diesel fuel spray with 3D-CFD code and validated the application by comparing experimental results of the fuel spray behavior and the equivalence ratio visualized by Layleigh-scatter imaging under some ambient, injection and fuel conditions. Using the applicable constants of KH-RT model, we can predict the liquid length spray on a quantitative level. under various fuel injection, ambient and fuel conditions. On the other hand, the change of the vapor penetration and the fuel mass fraction and equivalence ratio distribution with change of fuel injection and ambient conditions quantitatively. The 3D-CFD code used in this study predicts the spray cone angle and entrainment of ambient gas are predicted excessively, therefore there is the possibility of the improvement in the prediction accuracy by the refinement of fuel droplets breakup and evaporation model and the quantitative prediction of spray cone angle.

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