Phenomenological micro-pilot ignition model for medium-speed dual-fuel engines

Park, Hyunchun; Wright, Yuri M.; Seddik, Omar; Srna, Aleš; Kyrtatos, Panagiotis; Boulouchos, Konstantinos

doi:10.1016/j.fuel.2020.118955

Cited by 13 publications

(2 citation statements)

References 39 publications

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“…Table 1 and Figure 8 show that the substances with the lowest T autoignition , such However, according to the thermal ignition theory, even a relatively small amount of a substance can play a leading role in the ignition process. For example, the ignition of a premixed main charge containing gaseous fuel (more than 98% of the total fuel energy) occurs through direct injection of a small amount of diesel fuel (usually 0.5 to 2% of the total fuel energy) in a micro-pilot dual-fuel engine (Park et al, 2021 ; H 2 ; and others. This ignition process is strongly similar to that of the CET.…”

Section: Chemistrymentioning

confidence: 99%

Fire boundaries of lithium-ion cell eruption gases caused by thermal runaway

Rao

Gao

et al. 2021

iScience

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Section: Chemistrymentioning

confidence: 99%

Fire boundaries of lithium-ion cell eruption gases caused by thermal runaway

Rao

Gao

et al. 2021

iScience

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“…A similar approach, consisting of the 1D spray model and an ignition delay model is presented in Ref. [21] and validated against measurement data from a medium speed engine operated in diesel and dual-fuel combustion mode. For ignition delays shorter than the injection duration, the ignition is assumed to take place at the spray tip, whereas for longer ignition delay periods the ignition is assumed to take place at the trailing edge of the spray.…”

Section: Introductionmentioning

confidence: 99%

A New Combustion Model for Medium Speed Dual-Fuel Engines in the Course of 0D/1D Simulation

Frerichs

Eilts

2022

Methane

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In this paper, a predictive combustion model is developed and implemented in GT-Power. The model consists of a detailed physically/chemically based ignition delay model, including a 1D spray model. The spray model results at the start of combustion are used to initialize the combustion model. The spray zone and the homogenous natural gas/air mixture are burned with different combustion models, to account for the effect of the inhomogeneous fuel distribution. NOx-emissions are modelled using a standard Extended Zeldovich Mechanism, and for the HC-emissions, two flame quenching models are included and extended with an empirical correlation. The models are calibrated with measurement data from a single cylinder engine, except for the ignition delay model which needs no calibration. The start of combustion and the combustion parameters are predicted well for a wide range of injection timings and operation conditions. Furthermore, considering unburned fuel, the engine operation parameters BSFC and IMEP are also predicted satisfactory. Due to the detailed description of the different combustion phases, the influence of the injection timing on the NOx-emission is captured satisfactorily, with the standard NOx-model. Finally, the knock limited MFB50 is also predicted within an acceptable range.

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