The Full Cycle HD Diesel Engine Simulations Using KIVA-4 Code

İmren, Abdurrahman; Golovitchev, Valeri; Soruşbay, Cem; Valentino, Gerardo

doi:10.4271/2010-01-2234

Cited by 12 publications

(5 citation statements)

References 21 publications

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“…The results were validated, demonstrating consistency with experimental data for parameters such as swirl flow, turbulent flow, spray and combustion characteristics, cylinder pressure, heat release rate, and nitrogen oxides generation. This validation confirms the reliability of the computational simulations using the KIVA code in capturing essential aspects of combustion behavior in ship engines [44][45][46][47][48]. Having been successfully verified, this code has been widely applied in the development and improvement of numerous diesel engines.…”

Section: Mathematical Model and Calculation Conditionssupporting

confidence: 64%

The Effect of Fuel Injection Conditions on Combustion Processes in a long stroke Cycle Marine Engine

Park

2023

Preprint

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With growing regulations on ship emissions, specifically carbon dioxide and nitrogen oxides, this study emphasizes the critical need for improving the performance of existing ship diesel engines. Focusing on easily modifiable injection conditions within the fuel system, the research aims to enhance combustion characteristics for operational ships. The study provides a concise analysis of the combustion performance improvements achievable in the field. The study employed a range of calculation conditions, spanning from fuel injection pressures of 20 MPa to 160 MPa, injection timing from 15 degrees before top dead center (BTDC) to 5 degrees after top dead center (ATDC), and spray angles varying between 10 degrees and 50 degrees. A comprehensive analysis was conducted, focusing on fuel distribution behavior, combustion dynamics, carbon monoxide (CO) production and extinction, as well as nitrogen oxide (NO) production. This thorough examination aimed to provide insights into the complex interplay of these factors in order to optimize combustion performance in ship diesel engines. The analysis indicated that substantial unburned fuel occurred at injection pressures below 40 MPa and spray angles less than 20 degrees. This issue was significantly mitigated when injection pressures exceeded 80 MPa or a spray angle of 40 degrees was employed. High flame propagation speeds were observed at injection pressures over 80 MPa and injection timings before BTDC 10. Carbon monoxide emissions were notably low when injection pressures exceeded 80 MPa and a 40-degree spray angle was used. Nitrogen oxide emissions were minimized under conditions of injection pressure below 40 MPa, injection timing after BTDC 5 degrees, and a spray angle between 30 and 40 degrees. The study concludes that the most effective injection conditions for concurrently reducing fuel consumption, minimizing incomplete combustion products, and lowering nitrogen oxide emissions in the target engine are optimal when the injection pressure is set at 80 MPa, the injection timing is positioned at 5 degrees before top dead center (BTDC), and the spray angle is maintained at 40 degrees.

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Section: Mathematical Model and Calculation Conditionssupporting

confidence: 64%

The Effect of Fuel Injection Conditions on Combustion Processes in a long stroke Cycle Marine Engine

Park

2023

Preprint

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“…In addition to being useful for computational studies, surrogate fuels are important for experimental work. Their simpler compositions can facilitate insights into fuel-composition and property effects on the in-cylinder vaporization, mixing, and combustion processes that ultimately determine engine efficiency, emissions, performance, and aftertreatment-system requirements. ,− Surrogate fuels also have value as time-invariant reference fuels for experimental studies. The compositions of real diesel fuels (even reference diesel fuels) vary over time because the compositions of the individual refinery streams that are blended to make finished fuels vary with the type of crude oil and/or other feedstocks being processed, refinery processing strategies, regulations on fuel composition or other properties, and liquid-phase reactions that occur during long-term storage.…”

Section: Introductionmentioning

confidence: 99%

Methodology for Formulating Diesel Surrogate Fuels with Accurate Compositional, Ignition-Quality, and Volatility Characteristics

et al. 2012

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In this study, a novel approach was developed to formulate surrogate fuels having characteristics that are representative of diesel fuels produced from real-world refinery streams. Because diesel fuels typically consist of hundreds of compounds, it is difficult to conclusively determine the effects of fuel composition on combustion properties. Surrogate fuels, being simpler representations of these practical fuels, are of interest because they can provide a better understanding of fundamental fuel-composition and property effects on combustion and emissions-formation processes in internal-combustion engines. In addition, the application of surrogate fuels in numerical simulations with accurate vaporization, mixing, and combustion models could revolutionize future engine designs by enabling computational optimization for evolving real fuels. Dependable computational design would not only improve engine function, it would do so at significant cost savings relative to current optimization strategies that rely on physical testing of hardware prototypes. The approach in this study utilized the stateof-the-art techniques of 13 C and 1 H nuclear magnetic resonance spectroscopy and the advanced distillation curve to characterize fuel composition and volatility, respectively. The ignition quality was quantified by the derived cetane number. Two wellcharacterized, ultra-low-sulfur #2 diesel reference fuels produced from refinery streams were used as target fuels: a 2007 emissions certification fuel and a Coordinating Research Council (CRC) Fuels for Advanced Combustion Engines (FACE) diesel fuel. A surrogate was created for each target fuel by blending eight pure compounds. The known carbon bond types within the pure compounds, as well as models for the ignition qualities and volatilities of their mixtures, were used in a multiproperty regression algorithm to determine optimal surrogate formulations. The predicted and measured surrogate-fuel properties were quantitatively compared to the measured target-fuel properties, and good agreement was found.

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“…The development of surrogate fuels with measured and predicted thermophysical properties similar to their refinery stream counterparts has been the focus of much fuel-related research. − Such research is necessary as the complexity and differences in the composition of refinery stream products make it difficult both to determine the effects of fuel composition on properties such as vaporization, mixing, and combustion and to compare results between different laboratories. One such research effort is under the auspices of the Coordinating Research Council (CRC) Advanced Vehicles, Fuels, and Lubricants (AVFL) technical committee.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Four Diesel Fuel Surrogates by the Advanced Distillation Curve Method

2016

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The development of surrogate fuels with measured and predicted thermophysical properties similar to their authentic refinery stream counterparts is critical for the development of alternative fuels and the optimization of engines to increase efficiency and decrease emissions. In this work, four diesel fuel surrogates, formulated according to a reliable and proven procedure, were characterized by the advanced distillation curve (ADC) method to determine the composition and enthalpy of combustion in various distillate volume fractions. Tracking the composition and enthalpy of distillate fractions provides valuable information for determining structure–property relationships and also provides the basis for the development of equations of state that can describe the thermodynamic properties of these complex or simplified mixtures. This comparison showed that the volatility characteristic of the four surrogates is quite similar not only to the target diesel fuel but also to a number of other prototype alternative diesel fuels. The number of components in the surrogates affected how closely their volatility profiles resembled diesel fuel, as might be expected. The surrogate labeled V0a, consisting of just four components, was the most dissimilar to the target diesel fuel with respect to the initial boiling point and volatility curve shape. This suggests that, although minimizing the number of components greatly eases modeling and formulation efforts, caution should be used to avoid oversimplifying the surrogate mixtures.

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The Full Cycle HD Diesel Engine Simulations Using KIVA-4 Code

Cited by 12 publications

References 21 publications

The Effect of Fuel Injection Conditions on Combustion Processes in a long stroke Cycle Marine Engine

The Effect of Fuel Injection Conditions on Combustion Processes in a long stroke Cycle Marine Engine

Methodology for Formulating Diesel Surrogate Fuels with Accurate Compositional, Ignition-Quality, and Volatility Characteristics

Characterization of Four Diesel Fuel Surrogates by the Advanced Distillation Curve Method

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