Research on the influence of dual spark ignition strategy at combustion process for dual cylinder free piston generator under direct injection

Yan, Xiaodong; Feng, Huihua; Zuo, Zhengxing; Jia, Boru; Zhang, Zhiyuan; Wu, Limin

doi:10.1016/j.fuel.2021.120911

Cited by 16 publications

(2 citation statements)

References 42 publications

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“…An experimental investigation of a twin spark engine with three various ignition timings and load conditions determined that the same spark timings of the spark plugs resulted in the highest brake thermal efficiency, volumetric efficiency, and lowest CO and UBHC emissions [5]. There have been some other past studies as well, discussing the variation of spark plug position [6,7], ignition timing [8,9,10] and flame front collision [11,12] in twin spark engines within the engine cylinder. All of these past studies provides us with an understanding of how spark plug parameters can affect engine performance.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on effect of spark plug configuration on performance in an engine cylinder

Bakhshi,

Pritanshu,

Shukla

2023

FME Transactions

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A numerical investigation of combustion inside single and twin-spark engines was performed to study the effect of a spark plug, positions and spark timings on engine performance. Improvement in engine performance is one of the automotive industry's primary research areas. Consequently, the study's results can be utilised to optimise engine configurations to achieve maximum performance. The investigation was conducted using a finite volume-based open-source software, OpenFOAM, for computational simulations. Simulations were conducted using the XiEngineFOAM solver with a transport equation for modelling flame fronts. The Standard k-e turbulence model was used to predict turbulence parameters. The simulation was conducted for compression and power stroke (crank angle between - 180° and 180°), assuming an even distribution of the air-fuel mixture within the pentroof 4-valve engine cylinder. Simulations were conducted for four cases, including variations in the position and timing of spark plugs in single-spark and twin-spark engines. According to the results of the simulations, the single-spark engine provides the best performance when the spark plug is ignited early and positioned at the cylinder's centre. When placed at an optimal position determined by flame travel and collision, the twin-spark engine gives the best performance at the highest difference between the spark timings of the two spark plugs.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation on effect of spark plug configuration on performance in an engine cylinder

Bakhshi,

Pritanshu,

Shukla

2023

FME Transactions

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“…Yan et al [17] investigated the effects of ignition position and ignition moment on the combustion process of a direct-injection dual-cylinder FPG (power of free piston generator) using a combination of experimental and simulation methods based on a dual-spark ignition strategy. The results show that the combustion process of direct-injection FPG is more sensitive to the change in ignition moment than the change in ignition angle position.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Research of Methane Premixed Combustion Characteristics Based on Constant Volume Combustion Chamber with Different Ignition Modes

Wang,

Zhang,

Fan

et al. 2023

Energies

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Dual spark plug ignition can accelerate the burning velocity of nature gas and improve the engine performance. However, the mechanism between the two flames and the disturbance characteristics of flame to flow field during the combustion process under different ignition strategies are still unclear. In order to reduce the interference of other external factors, this paper is based on the CFD software CONVERGE 3.0, using G equations combined with SAGE detailed chemical reaction mechanism, the combustion model is constructed based on the closed constant volume combustion chamber. The accuracy of the model was verified using experimental data. The methane–air premixed combustion process under different ignition strategies (single spark ignition, dual spark synchronous ignition and dual spark asynchronous ignition) was simulated using this model. The results show that the flame propagation speeds under the dual spark ignition plan are all smaller than that of single spark ignition due to the inhibition of the opposite side flame. However, it still has obvious fast combustion characteristics, shortens the combustion duration and improves the heat release rate. The flame stability is optimum under synchronous ignition with the pressure offsetting effect, and with the increase in the ignition interval, the flame stability decreases, and the disturbance of the flow field gradually increases. There is little effect of ignition position on combustion pressure and heat release rate. Compared with single spark ignition and dual spark asynchronous ignition, dual spark synchronous ignition has better combustion characteristics. It can improve thermal efficiency while ensuring flame stability. This is a key technology for improving the natural gas engine performance.

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Positioning of Generators with a Free Piston Reverse Electromagnetic Damper

Cherkasov

Kosolap²,

Tsepordey³

et al. 2022

Lecture Notes in Electrical Engineering

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Research on the influence of dual spark ignition strategy at combustion process for dual cylinder free piston generator under direct injection

Cited by 16 publications

References 42 publications

Numerical investigation on effect of spark plug configuration on performance in an engine cylinder

Numerical investigation on effect of spark plug configuration on performance in an engine cylinder

Simulation and Research of Methane Premixed Combustion Characteristics Based on Constant Volume Combustion Chamber with Different Ignition Modes

Positioning of Generators with a Free Piston Reverse Electromagnetic Damper

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