Experimental and Numerical Assessment of Active Pre-chamber Ignition in Heavy Duty Natural Gas Stationary Engine

Onofrio, Gessica; Li, Changle; Valladolid, Pablo García; Morena, Joaquín De la; García, Antonio; Tunestål, Per; Beatrice, Carlo

doi:10.4271/2020-01-0819

Cited by 14 publications

(4 citation statements)

References 25 publications

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“…To obtain an accurate instantaneous heat release rate as well as proper control of 45 the equivalence ratio in the pre-chamber at the spark timing, an accurate calculation of the gas exchange between those two chambers is mandatory. Here, the compressible flow through an isenthalpic orifice is normally adopted [54,107,108],…”

Section: Simplified 0d and 1d Simulationmentioning

confidence: 99%

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

Zhu

Akehurst

Yuan

2022

Renewable and Sustainable Energy Reviews

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Section: Simplified 0d and 1d Simulationmentioning

confidence: 99%

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

Zhu

Akehurst

Yuan

2022

Renewable and Sustainable Energy Reviews

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“…Olsen and Lisowski [27] indicated that the main source of NOx emissions at ultra-lean conditions could be the pre-chamber rather than the main chamber combustion. Onofrio et al [28] experimentally demonstrated that the NOx emission at ultra-lean conditions is sensitive to spark timing. In this case, the NOx emissions of PRF95 are slightly lower due to the spark timings.…”

Section: Knock and Indicated Specific Emissionsmentioning

confidence: 99%

Analysis of Fuel Properties on Combustion Characteristics in a Narrow-Throat Pre-Chamber Engine

Hlaing

Marquez

Burgos

et al. 2021

SAE Int. J. Adv. & Curr. Prac. in Mobility

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In this study, the authors investigated the effect of fuel properties on the combustion characteristics by employing methane, methanol, ethanol, and primary reference fuels (PRFs) as the main chamber fuel while using methane for the pre-chamber. Global excess air ratios (λ) from 1.6 to lean limit were tested, while 13% of total fuel energy supplied to the engine was delivered via the pre-chamber. The gaseous methane was injected into the pre-chamber at the gas exchange top-dead-center (TDC). Port fuel injection was tested with both open and closed inlet valves. The pre-chamber assembly was designed to fit into the diesel injector pocket of the base engine, which resulted in a narrow throat diameter of 3.3 mm. The combustion stability limit was set at 5% of the coefficient of variation of gross IMEP, and the knock intensity limit was set at 10 bar. GT-Power software was used to estimate the composition of pre-chamber species and was used in heat release analysis of the two chambers. It was found that the rich limit was controlled by engine knock. Hence a higher reactivity fuel (lower octane) had to be operated leaner. However, with the increasing reactivity, the lean limit was also extended, while the peak efficiency was also obtained with a leaner mixture. With PRF 90, the lean limit was at global-λ = 3.0, while the limit was 2.3 with methane. The alcohol fuels exhibited a different behavior from the methane and the PRFs. Ethanol has the same lean limit as PRF100, but methanol could be operated up to global-λ = 3.2. The pre-chamber combustion did not change much with the different fuels in the main chamber, so the combustion stability trends must be related to the transition from burning jets to ignition of the main chamber charge and its subsequent combustion.

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“…Looking at the pre-chamber injection system details in Figure 2, it is possible to observe that the fuel is provided by an external line, from the south-west Swedish national grid. Detailed specifications about the fuel composition and its chemicalphysical properties are presented in Onofrio et al [34]. The same fuel is used to feed both injection systems, the port fuel injection (PFI) and the pre-chamber injection system.…”

Section: Engine Characteristics and Test Cell Descriptionmentioning

confidence: 99%

Combining in-cylinder pressure and 1D simulation tools to understand the combustion characteristics of natural gas in pre-chamber ignition systems for energy generation

García

Morena

Monsalve‐Serrano

et al. 2021

Energy Conversion and Management

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Experimental and Numerical Assessment of Active Pre-chamber Ignition in Heavy Duty Natural Gas Stationary Engine

Cited by 14 publications

References 25 publications

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

Analysis of Fuel Properties on Combustion Characteristics in a Narrow-Throat Pre-Chamber Engine

Combining in-cylinder pressure and 1D simulation tools to understand the combustion characteristics of natural gas in pre-chamber ignition systems for energy generation

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