Experimental study on cycle-to-cycle variations in natural gas/methanol bi-fueled engine under excess air/fuel ratio at 1.6

Chen, Zhanming; He, Jingjing; Chen, Hao; Geng, Limin; Zhang, Peng

doi:10.1016/j.energy.2021.120233

Cited by 17 publications

(2 citation statements)

References 56 publications

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“…In dual-fuel operation, combustion changes from a constant pressure process to a constant volume process. Overall, cyclic variations of examined CAs and CA10-90 period showed quite smooth variations compared to those in spark ignition engines in published literature (Liu et al, 2022;Chen et al, 2021). Corresponding average values of CA10, CA50, CA90 and CA10-90 are presented in Fig.…”

Section: Cyclic Ca10 Ca50 Ca90 and Ca10-90 Variationsmentioning

confidence: 52%

Effects of Piston Coating on Combustion Stability in a Crdi Diesel Engine Run Under Dual-Fuel Mode

Şanlı,

Yılmaz,

Öz

2024

Isı Bilimi Ve Tekniği Dergisi

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Combustion stability in diesel engines is defined by cycle-to-cycle variations. In this study, effects of piston coating and engine load on cycle-to-cycle combustion behavior were investigated in a diesel engine operated on gaseous fuel mixture at different loads. Coated and uncoated piston tests under dual-fuel and single diesel modes were performed at three different loads including 50 Nm, 75 Nm, and 100 Nm at a constant speed of 1750 rpm. The piston bowls were coated by %8 yttria stabilized zirconia with the thickness of 0.4 mm. Dual-fuel mode is consisted of mixture of hydrogen enriched synthetic biogas, with the percentage of 80% CH4, 10% CO2, and 10% H2. Main combustion parameters (cylinder pressure with crank angle, peak cylinder pressure (CPmax), peak pressure rise rate (PRRmax), indicated mean effective pressure (IMEP), CA10, CA50, CA90, and CA10-90 duration) were addressed in view of cyclic aspects. The results showed that the piston coating was comparatively more effective in reducing the coefficient of variation (COV) and standard deviation (SD) values of main combustion parameters, especially at low and medium loads. SD, frequency distribution, and COVs of CPmax and IMEP were quite better at a medium test load of 75 Nm. The piston coating also reduced COV of CP with crank angle under all tests. As increasing the engine load, cyclic samples of CPmax and PRRmax enhanced and advanced for both diesel and dual-fuel modes. By the piston coating and engine loads, Cyclic CA10 and CA50 variations were slightly affected whereas cyclic CA90 were tremendously changed. Therefore, CA10-90 period was importantly affected by piston coating and load. The highest relationship among the main combustion parameters was between CPmax and PRRmax for both piston cases. In dual-fuel mode, a strong relationship emerged between IMEP and CPmax at low load.

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Section: Cyclic Ca10 Ca50 Ca90 and Ca10-90 Variationsmentioning

confidence: 52%

Effects of Piston Coating on Combustion Stability in a Crdi Diesel Engine Run Under Dual-Fuel Mode

Şanlı,

Yılmaz,

Öz

2024

Isı Bilimi Ve Tekniği Dergisi

View full text Add to dashboard Cite

show abstract

“…Natural gas (NG) is widely used in power plants, vehicles, and marine engines because of its favourable physical and chemical properties, such as low carbon numbers and harmful emissions [ 1 , 2 ]. The NG direction injection (DI) technique enables high thermal efficiency and clean exhaust emissions in modern engines [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on high-pressure methane jet characteristic single-hole injector

Lei

Zhou²,

Qiu³

et al. 2023

Heliyon

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Improving the lean burn performance of a high compression ratio methanol engine by multiple-injection

Duan,

Li,

Liu

et al. 2024

Applied Thermal Engineering

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Experimental study on cycle-to-cycle variations in natural gas/methanol bi-fueled engine under excess air/fuel ratio at 1.6

Cited by 17 publications

References 56 publications

Effects of Piston Coating on Combustion Stability in a Crdi Diesel Engine Run Under Dual-Fuel Mode

Effects of Piston Coating on Combustion Stability in a Crdi Diesel Engine Run Under Dual-Fuel Mode

Experimental investigation on high-pressure methane jet characteristic single-hole injector

Improving the lean burn performance of a high compression ratio methanol engine by multiple-injection

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