Experimental and numerical investigation of the ignition process in a large bore dual fuel engine

Millo, Federico; Accurso, Francesco; Piano, Andrea; Caputo, Gennaro; Cafari, Alberto; Hyvönen, Jari

doi:10.1016/j.fuel.2020.120073

Cited by 15 publications

(9 citation statements)

References 35 publications

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“…e algorithmic compilation, or automated compilation, is a set of rules designed to make a variety of music an organic whole in accordance with certain rules. Algorithm design does not have to be computer [16]. In the classical era, a combination of different music modules was created at random to create a "music cube game" with good results.…”

Section: Methodsmentioning

confidence: 99%

Self‐Psychological Control and Creativity of Music Creation in Multimusic Environment

2022

Journal of Environmental and Public Health

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This study aimed to solve the difficulties in the research of self-psychology, three executive controls, and creativity in multimusic environment. In today’s teaching and performance, the study of piano adaptation has practical significance in broadening artistic vision, improving performance technology, and training symphonic music thinking. A research method of self-psychological three executive controls and creativity generation for creation in multimusic environment is proposed. A computer composition algorithm is based on the hidden Markov model and interactive genetic algorithm. By integrating melody elements and rhythm into the traditional Markov model with only notes or rhythm as the unit, a new hidden Markov music prediction model is established, and the interactive genetic algorithm is used to optimize the music segments. Simulation results show that the algorithm can use a small dataset to quickly create music clips with certain melody logic and in line with users’ personality. It is proved that the method based on the hidden Markov model and interactive genetic algorithm can meet the research needs of self-psychological three execution control and creativity generation in multimusic environment.

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Section: Methodsmentioning

confidence: 99%

Self‐Psychological Control and Creativity of Music Creation in Multimusic Environment

2022

Journal of Environmental and Public Health

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“…In Ref. [17], the model is extended with a new ignition delay correlation derived from reaction kinetics calculations and the ignition delay calculation is validated for a medium speed dual-fuel engine.…”

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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“…The problem was solved by advanced injection time. Millo et al [27] studied the ignition process of dual-fuel engines through detailed experimental analysis. Based on the detailed chemical reaction mechanism of 0-D, a high precision ignition delay model was developed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Injection Strategies on Combustion and Emission Characteristics of Diesel Engine Fueled with Dual Fuel

et al. 2021

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In this work, an effective numerical simulation method was developed and used to analyze the effects of natural gas mixing ratio and pilot-main injection, main-post injection, and pilot-main-post injection strategies on the combustion and emission characteristics of diesel engine fueled with dual fuel. Firstly, the one-dimensional calculation model and three-dimensional CFD model of the engine were established by AVL-BOOST and AVL-Fire, respectively. In addition, the simplified chemical kinetics mechanism was adopted, which could accurately calculate the combustion and emission characteristics of the engine. The results show that the cylinder pressure and heat release rate decrease with the increase of the natural gas mixing ratio and the NOx emission is reduced. When the NG mixing ratio is 50%, the NOx and CO emission are reduced by 47% and 45%, respectively. When the SODI3 is 24 °CA ATDC, the NOx emission is reduced by 29.6%. In addition, with suitable pilot-main injection and pilot-main-post injection strategies, the combustion in the cylinder can be improved and the trade-off relationship between NOx and soot can be relaxed. Thus, the proper main-post injection strategy can improve the combustion and emission characteristics, especially the reduction in the NOx and CO emissions.

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Experimental and numerical investigation of the ignition process in a large bore dual fuel engine

Cited by 15 publications

References 35 publications

Self‐Psychological Control and Creativity of Music Creation in Multimusic Environment

Self‐Psychological Control and Creativity of Music Creation in Multimusic Environment

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

Effects of Different Injection Strategies on Combustion and Emission Characteristics of Diesel Engine Fueled with Dual Fuel

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