Simulation on the effect of compression ratios on the performance of a hydrogen fueled opposed rotary piston engine

Gao, Jianbing; Zhang, Huijie; Li, Juxia; Wang, Yufeng; Tian, Gui Yun; Ma, Chaochen; Wang, Xiaochen

doi:10.1016/j.renene.2022.01.091

Cited by 19 publications

(1 citation statement)

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“…Hydrogen stands out as the most promising fuel due to its array of favorable characteristics, including its high heating value, rapid flame propagation rate, and notable reaction activity [4,5]. Benbellil conducted experiments on a dualfuel compression-ignition engine, finding that blending natural gas with hydrogen improved combustion, reduced HC and CO emissions, but cautioned against H2 concentrations exceeding 50% at high loads due to engine knock [6].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Hydrogen and Ammonia Injection Timing for Enhanced Mixture Formation in Internal Combustion Engines

Guo,

Lou,

Zhang

et al. 2024

JERR

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Hydrogen and ammonia are two carbon-free alternative fuels for engines. They represent some of the most viable pathways toward achieving our objectives of energy conservation and reducing emissions. To research the quality of the hydrogen-ammonia-air mixture formation under different hydrogen/ammonia injection timing, a three-dimensional simulation model for a PFI(Port Fuel Injection) hydrogen internal combustion engine with the inlet, outlet, valves and cylinder was established using Converge software. Research focused on the space distribution characteristics and variation law of velocity field, concentration field and turbulent kinetic energy under different injection timings in order to reveal the influence of these parameters on hydrogen-ammonia-air mixture formation process. The results showed that hydrogen injection should be neither too early nor too late. Backfiring can be initiated too early or too late. Therefore, the optimum starting point for hydrogen/ammonia injection should be 338°CA.

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Section: Introductionmentioning

confidence: 99%