Ignition characterization of F-76 and algae-derived HRD-76 at elevated temperatures and pressures

Valco, Daniel; Tess, Michael; Temme, Jacob; Kurman, Matthew S.; Oldani, Anna; Kweon, Chol Bum; Oehlschlaeger, Matthew A.; Lee, Tonghun

doi:10.1016/j.combustflame.2017.03.018

Cited by 14 publications

(8 citation statements)

References 20 publications

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“…Hydroxyl radical (OH) chemiluminescence imaging was performed to investigate the kernel formation and combustion process of the spray ignition in the CPFC with a setup similar to that used in previous tests . Additionally, broadband chemiluminescence was simultaneously collected.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Idicheria and Pickett used laser extinction and planer laser-induced incandescence to focus on the soot formation of diesel sprays at high exhaust gas recovery conditions . Valco et al used similar techniques to investigate the ignition process of F-76 and an algae-derived HRD-76 using intensified high-speed broadband and hydroxyl chemiluminescence …”

Section: Introductionmentioning

confidence: 99%

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Effect of the Cetane Number on Jet Fuel Spray Ignition at High-Temperature and -Pressure Conditions

et al. 2020

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This study investigates the impact of the fuel cetane number on the ignition and combustion dynamics of a high-pressure jet fuel spray under realistic diesel engine conditions. Under the desirable single-fuel concept for U.S. military applications, jet fuels would be used in traditional diesel engines. However, there is no cetane specification for such fuels, and substantial variation has been observed. To better understand the ignition and combustion dynamics of jet fuels subjected to diesel conditions, a series of test fuels have been constructed with varying cetane numbers between 30 and 55. Schlieren and chemiluminescence imaging were performed on the ignition process of four cetane number fuels, 30, 40, 50, and 55, at three ambient pressure conditions 4, 6, and 8 MPa. Fuel breakdown prior to ignition is tracked, and the size of the ignition kernel is extracted from the Schlieren imaging. Hydroxyl radical (OH) chemiluminescence intensity is used to estimate the heat release rate. Ignition and initial fuel breakdown delay from ignition were found to typically decrease with the increasing cetane number. The decrease in ignition delay is smaller at higher ambient pressures. Early timescale kernel growth was found to be dominated by the cetane number with a higher cetane number leading to faster kernel growth. Growth at later timescales is determined by injection pressure. The effect of cetane number decreases with increasing ambient pressure. The estimated heat release rate from OH chemiluminescence shows increasing heat release with the increasing cetane number at 4 MPa ambient, but there is no clear relationship at higher pressures.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of the Cetane Number on Jet Fuel Spray Ignition at High-Temperature and -Pressure Conditions

et al. 2020

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“…A surrogate fuel is defined as a fuel with only a few representative components to mimic certain characteristics of complex fuels, such as gasoline, diesel, and jet fuel, which usually contain n -alkanes, branched alkanes, cycloalkanes, aromatics, and others. , For low-molecular-weight fuels, such as gasoline, there are a lot of simple branched alkanes, such as iso -octane, iso -pentane, , –methylhexane, , –methylbutane, , –and dimethylhexane, , that can be considered as surrogate candidate components. However, high-molecular-weight fuels, such as diesel, jet fuel, bio-derived hydroprocessed renewable jet fuel, and hydroprocessed renewable diesel fuels, usually contain a high quantity of iso-paraffinic molecular structures with an average number of carbon atom more than 15. However, until now, only iso -cetane (C 16 H 34 , 2,2,4,4,6,8,8-heptamethylnonane) − has been selected to represent the branched alkanes class because of the lack of reliable kinetic models for other highly branched alkanes with more carbon atoms.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Chemical Kinetic Model of 2,6,10-Trimethyl Dodecane

Jin

Gou

2019

Energy Fuels

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As a novel alternative fuel and surrogate component, 2,6,10-trimethyl dodecane has received extensive attention. For designing and optimizing internal combustion engines and propulsion systems by computational fluid dynamics, and providing more choices for a branched surrogate component to develop a more accurate surrogate model, a comprehensive detailed chemical kinetic model for 2,6,10-trimethyl dodecane has been developed based on 35 reaction classes to numerically describe its experimental observations. The proposed detailed kinetic model for 2,6,10-trimethyl dodecane has been validated against a wide range of experimental data, including ignition delay time, flow reactor, and laminar flame speeds. A good agreement between the numerical and the experimental data is observed. Using the kinetic model reduction scheme, high-temperature and low-temperature chemical kinetic models were eventually obtained and validated against the detailed kinetic model. The successful implementation of a kinetic model construction based on 35 reaction classes has indicated the possibility of its application for the development of mechanisms for the larger hydrocarbon fuels with asymmetric and iso-paraffinic molecular structures.

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“…The Sauter mean diameter was lower than heavy fuel oil due to lower fuel properties (density, viscosity, and surface tension). Conventional military diesel fuel was studied by Valco et al, 2017, the spray combustion of F-76, and hydrotreated renewable diesel fuel, HRD-76. The characteristic of HRD-76 was shown to have shorter autoignition delays and shorter lift-off lengths as compared with F-76.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Atomizing Spray From Diesel Injectors Using Algae and Biodiesel Fuels

Jasim

2019

Kufa J. Eng.

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Fuel atomization in diesel compression ignition engines is significantly affected on the performance, evaporation, self-ignition, and emissions of the engine. Therefore, the quality of the spray atomization has to study at first. Algae-Derived renewable diesel fuel in a single hole nozzle atomizer has been chosen as an alternative fuel for diesel. The differences in physical properties of algae-derived renewable diesel, biodiesels (from palm and cooked oil) and pure diesel are effected on both spray characteristics and the internal nozzle flow. Numerical simulations are presented in this study using Eulerian-Eulerian technique to model the spraygas interaction. The spray moments model has been used to characterize the spray parameters. First, the model is validated against the spray tip penetration of diesel spray characteristics obtained from the experimental data conducted in house-code using constant volume spray chamber and the results show a good agreement. Then, comparisons were made among the selected fuels. The numerical simulations show that the algae-derived renewable diesel is very similar to pure diesel and can be used as an alternative fuel.

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Ignition characterization of F-76 and algae-derived HRD-76 at elevated temperatures and pressures

Cited by 14 publications

References 20 publications

Effect of the Cetane Number on Jet Fuel Spray Ignition at High-Temperature and -Pressure Conditions

Effect of the Cetane Number on Jet Fuel Spray Ignition at High-Temperature and -Pressure Conditions

Comprehensive Chemical Kinetic Model of 2,6,10-Trimethyl Dodecane

Comparative Analysis of Atomizing Spray From Diesel Injectors Using Algae and Biodiesel Fuels

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