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Investigation of oil transport route around piston ring based on multiphase flow simulation

2018; The Japan Society of Mechanical Engineers; Volume: 2018.31; Linguagem: Inglês

10.1299/jsmecmd.2018.31.332

2424-2799

Yuiki Kuramoto, Yuki KAWAMOTO, Takumi OGURI, Shun Takahashi, Masayuki OCHIAI, Akihiko AZETSU, Kenji Yamamoto,

Oil and Gas Production Techniques

Post-injection is a technology to reduce emissions of diesel particulate substance by the small amount of fuel injection after the main injection. However, fuel adhering to bore wall mixes into oil and loss of lubrication performance. We predicted the transport of diluted fuel around the piston ring and developed the three-phase flow simulation code considered air, fuel, and oil. We compared the behavior of two phase, three phase and experiment by liquid sloshing for the validation. The frequency of the movement of the liquid in the calculation was the same as the experiment. However, the difference in the height of the liquid phase at the left wall boundary of the liquid phase was seen. This is because that the behavior of the interface between the oil and the fuel can't be reproduced and how the liquid adheres to the wall surface is different. Consequently, it is necessary to consider the interfacial tension between liquid-liquid in three-phase flow analysis.