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Limited By:	Author = Zhang, Kuiwen;

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Displaying Results 1 - 7 of 7 on page 1 of 1

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A comprehensive experimental and kinetic modeling study of 1-and 2-pentene (2021)

Dong, Shijun; Zhang, Kuiwen; Ninnemann, Erik M.; Najjar, Ahmed; Kukkadapu, Goutham; Bak...

A comprehensive experimental and kinetic modeling study of 1-and 2-pentene (2021)

Dong, Shijun; Zhang, Kuiwen; Ninnemann, Erik M.; Najjar, Ahmed; Kukkadapu, Goutham; Baker, Jessica; Arafin, Farhan; Wang, Zhandong; Pitz, William J.; Vasu, Subith S.; Sarathy, S. Mani; Senecal, Peter K.; Curran, Henry J.

Abstract:

1- and 2-pentene are components in gasoline and are also used as representative alkene components in gasoline surrogate fuels. Most of the available ignition delay time data in the literature for these fuels are limited to low pressures, high temperatures and highly diluted conditions, which limits the kinetic model development and validation potential of these fuels. Therefore, ignition delay time measurements under engine-like conditions are needed to provide target data to understand their low-temperature fuel chemistry and extend their chemical kinetic validation to lower temperatures and higher pressures. In this study, both a high-pressure shock tube and a rapid compression machine have been employed to measure ignition delay times of 1- and 2-pentene over a wide temperature range (60 0-130 0 K) at equivalence ratios of 0.5, 1.0 and 2.0 in 'air', and at pressures of 15 and 30 atm. At high-temperatures (> 900 K), the experimental ignition delay times show that the ...

http://hdl.handle.net/10379/16444

Marked Mark

A detailed chemical kinetic modeling and experimental investigation of the low- and high-temperature chemistry of n-butylcyclohexane (2021)

Pitz, William J.; Liang, Jinhu; Kukkadapu, Goutham; Zhang, Kuiwen; Conroy, Christine; B...

A detailed chemical kinetic modeling and experimental investigation of the low- and high-temperature chemistry of n-butylcyclohexane (2021)

Pitz, William J.; Liang, Jinhu; Kukkadapu, Goutham; Zhang, Kuiwen; Conroy, Christine; Bugler, John; Curran, Henry J.

Abstract:

Chemical kinetic models of gasoline, jet, and diesel fuels and their mixtures with bioderived fuels are needed to assess fuel property effects on efficiency, emissions, and other performance metrics in internal combustion and gas turbine engines. As these real fuels have too many fuel components to be included in a chemical kinetic model, surrogate fuels containing fewer components are used to represent them. These surrogate fuels mimic the chemical classes or molecular structures contained in the real fuel. One of the important chemical classes in gasoline, jet, and diesel fuels comprises cyclohexanes. Cyclohexanes comprise about 30% or more by weight in diesel fuel. Also, Mueller et al (Energy Fuels. 2012;26(6):3284-3303) proposed n-butylcyclohexane (nBCH) as a component in a nine-component surrogate palette to represent the ignition properties, distillation curve, density, and molecular structures of a diesel certification fuel. In this work, experimental measurements of the igni...

http://hdl.handle.net/10379/16440

Marked Mark

An experimental and kinetic modeling study of n-hexane oxidation (2016)

Zhang, Kuiwen; Banyon, Colin; Togbé, Casimir; Dagaut, Philippe; Bugler, John; Curran, H...

An experimental and kinetic modeling study of n-hexane oxidation (2016)

Zhang, Kuiwen; Banyon, Colin; Togbé, Casimir; Dagaut, Philippe; Bugler, John; Curran, Henry J.

Abstract:

Ignition delay times for n-hexane oxidation have been measured in a rapid compression machine (RCM) at stoichiometric conditions and at 15 bar. Due to the high reactivity of n-hexane and non-ideal experimental effects associated with measuring short ignition delay times in the RCM (i.e. under 5 ms), further experiments were performed in a high-pressure shock tube for multiple fuel mixtures at equivalence ratios of phi = 1 and = 2 over the temperature range of 627-1365 K at pressures of 15 and 32 bar. To further study the concentration of intermediate species during the oxidation process, experiments have also been carried out in a jet-stirred reactor over a wide temperature range of 530-1160 K at 10 atm pressure and at equivalence ratios of phi = 0.5, 1.0 and 2.0. Species which include reactants, intermediates and products were identified and quantified as a function of temperature. These experimental results were used to aid the development and validation of a detailed kinetic mode...

http://hdl.handle.net/10379/5639

Marked Mark

An experimental, theoretical, and modeling study of the ignition behavior of cyclopentanone (2019)

Zhang, Kuiwen; Lokachari, Nitin; Ninnemann, Erik; Khanniche, Sarah; Green, William H.; ...

An experimental, theoretical, and modeling study of the ignition behavior of cyclopentanone (2019)

Zhang, Kuiwen; Lokachari, Nitin; Ninnemann, Erik; Khanniche, Sarah; Green, William H.; Curran, Henry J.; Vasu, Subith S.; Pitz, William J.

Abstract:

The ignition delay times of cyclopentanone in air were measured using a high pressure shock tube (HPST) and a rapid compression machine (RCM) over the temperature range of 794-1368 K at P = 15 and 30 bar and at equivalence ratios of 0.5, 1.0 and 2.0. To provide more insight into the oxidation of cyclopentanone, CO time-histories during cyclopentanone oxidation in a shock tube at high temperatures and various pressures were also measured. In addition, quantum chemistry calculations have been performed to calculate the reaction rates for the olefin +HO2 center dot elimination reactions of fuel peroxyl radical decomposition reactions, which were suggested as critical reaction pathways for the oxidation of cyclopentanone in previous studies. Based on these experimental and theoretical investigations, a detailed kinetic model has been developed and validated using the experimental data. The model has satisfactorily reproduced the ignition delay times in the RCM and shock tube, and CO his...

http://hdl.handle.net/10379/15095

Marked Mark

An RCM experimental and modeling study on CH4 and CH4/C2H6 oxidation at pressures up to 160 bar (2017)

Ramalingam, Ajoy; Zhang, Kuiwen; Dhongde, Avnish; Virnich, Lukas; Sankhla, Harsh; Curra...

An RCM experimental and modeling study on CH4 and CH4/C2H6 oxidation at pressures up to 160 bar (2017)

Ramalingam, Ajoy; Zhang, Kuiwen; Dhongde, Avnish; Virnich, Lukas; Sankhla, Harsh; Curran, Henry J.; Heufer, Alexander

Abstract:

The oxidation of CH4 and CH4/C2H6 mixtures were studied at pressures relevant to knocking in large bore natural gas engines. The experiments were carried out in a rapid compression machine (RCM) at end of compression (EOC) temperatures ranging between 885 and 940 K at compressed gas pressures of 105, 125, 150, and 160 bar at varying equivalence ratios (0.417, 0.526, and 1.0) and dilution percentages (0, 10, and 30% Exhaust Gas Recirculation - EGR) that were defined in a test matrix. This study describes the method and limitations of performing high-pressure experiments of this magnitude in an RCM, modeling, and validation of the kinetic mechanism against experimental data. While the recently published AramcoMech 2.0 could well predict the ignition delay times (IDTs) for CH4 within the uncertainty ranges at comparatively higher pressures and lower temperatures (885-940 K), the predicted reactivity is, in general, lower than that of AramcoMech 1.3 as shown in our previous screening st...

http://hdl.handle.net/10379/6899

Marked Mark

An updated experimental and kinetic modeling study of n-heptane oxidation (2016)

Zhang, Kuiwen; Banyon, Colin; Bugler, John; Curran, Henry J.; Rodriguez, Anne; Herbinet...

An updated experimental and kinetic modeling study of n-heptane oxidation (2016)

Zhang, Kuiwen; Banyon, Colin; Bugler, John; Curran, Henry J.; Rodriguez, Anne; Herbinet, Olivier; Battin-Leclerc, Frédérique; B'Chir, Christine; Heufer, Karl Alexander

Abstract:

Journal article
This work presents an updated experimental and kinetic modeling study of n-heptane oxidation. In the experiments, ignition delay times of stoichiometric n-heptaneiair mixtures have been measured in two different high-pressure shock tubes in the temperature range of 726-1412 K and at elevated pressures (15, 20 and 38 bar). Meanwhile, concentration versus time profiles of species have been measured in a jet-stirred reactor at atmospheric pressure, in the temperature range of 500-1100K at phi=0.25, 2.0 and 4.0. These experimental results are consistent with those from the literature at similar conditions and extend the current data base describing n-heptane oxidation.Based on our experimental observations and previous modeling work, a detailed kinetic model has been developed to describe n-heptane oxidation. This kinetic model has adopted reaction rate rules consistent with those recently developed for the pentane isomers and for n-hexane. The model has been validat...

http://hdl.handle.net/10379/6098

Marked Mark

The oxidation of 2-butene: A high pressure ignition delay, kinetic modeling study and reactivity comparison with isobutene and 1-butene (2017)

Li, Yang; Zhou, Chong-Wen; Somers, Kieran P.; Zhang, Kuiwen; Curran, Henry J.

The oxidation of 2-butene: A high pressure ignition delay, kinetic modeling study and reactivity comparison with isobutene and 1-butene (2017)

Li, Yang; Zhou, Chong-Wen; Somers, Kieran P.; Zhang, Kuiwen; Curran, Henry J.

Abstract:

Butenes are intermediates ubiquitously formed by decomposition and oxidation of larger hydrocarbons (e.g. alkanes) or alcohols present in conventional or reformulated fuels. In this study, a series of novel igni-tion delay time (IDT) experiments of trans-2-butene were performed in a high-pressure shock tube (HPST) and in a rapid compression machine (RCM) under conditions of relevance to practical combustors. This is the first IDT data of trans-2-butene taken at engine relevant conditions, and the combination of HPST and RCM results greatly expands the range of data available for the oxidation of trans-2-butene to higher pressures (10-50 atm), lower temperatures (670-1350 K) and a wide range of equivalence ratios (0.5-2.0). A comprehensive chemical kinetic mechanism has simultaneously been developed to describe the combustion of trans-2-butene. It has been validated using the IDT data measured here in addition to a large variety of literature data: jet-stirred reactor (JSR) speciatio...

http://hdl.handle.net/10379/6650

Displaying Results 1 - 7 of 7 on page 1 of 1