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- W4311194280 endingPage "126861" @default.
- W4311194280 startingPage "126861" @default.
- W4311194280 abstract "The urgent need for decarbonization and emission reduction for marine engines is driving the development of alternative low-carbon fuels. One of the best alternative fuels for engines is natural gas, a clean energy source with vast reserves and a low price. However, low-pressure injection dual-fuel engines exhibit poor combustion characteristics at low engine loads, and extinction is likely to occur in the fuel mixture's dilution region. Thus, the Low Pressure Post Injection (LPPI) strategy was proposed in this paper. The major objective of the LPPI mode is to increase monocirculation combustion stability under low to moderate engine loads by achieving a reasonable distribution of NG in the combustion chamber. LPPI was compared with the Low Pressure Injection (LPI) strategy. Results indicate that the LPPI mode could successfully raise the swirl ratio in the cylinder up to 60.7 percent while perfectly avoiding the NG leakage phenomena. Additionally, with the aid of radial-wall distribution of NG and an improved swirl ratio in LPPI mode, the combustion duration is reduced by 33.6 percent, and the lean burn limit of the dual-fuel marine engine can be expanded to 0.30. Although local higher combustion temperature caused an large increase in NOx emission which is more than three times than LPI NOx emission, LPPI mode still meets Tier III NOx emission requirements." @default.
- W4311194280 created "2022-12-24" @default.
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- W4311194280 date "2023-04-01" @default.
- W4311194280 modified "2023-10-17" @default.
- W4311194280 title "Numerical research of the in-cylinder natural gas stratification in a natural gas-diesel dual-fuel marine engine" @default.
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- W4311194280 doi "https://doi.org/10.1016/j.fuel.2022.126861" @default.
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