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Author = Kukkadapu, Goutham;
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Displaying Results 1 - 9 of 9 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
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A comprehensive experimental and modeling study of isobutene oxidation
(2016)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Ke...
A comprehensive experimental and modeling study of isobutene oxidation
(2016)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Keesee, Charles; Mathieu, Olivier; Petersen, Eric L.; DeVerter, Trent A.; Oehlschlaeger, Matthew A.; Kukkadapu, Goutham; Sung, Chih-Jen; Alrefae, Majed; Khaled, Fathi; Farooq, Aamir; Dirrenberger, Patricia; Glaude, Pierre-Alexandre Glaude; Battin-Leclerc, Frédérique; Santner, Jeffrey; Ju, Yiguang
Abstract:
Isobutene is an important intermediate in the pyrolysis and oxidation of higher-order branched alkanes, and it is also a component of commercial gasolines. To better understand its combustion characteristics, a series of ignition delay time (IDT) and laminar flame speed (LFS) measurements have been performed. In addition, flow reactor speciation data recorded for the pyrolysis and oxidation of isobutene is also reported. Predictions of an updated kinetic model described herein are compared with each of these data sets, as well as with existing jet-stirred reactor (JSR) species measurements.IDTs of isobutene oxidation were measured in four different shock tubes and in two rapid compression machines (RCMs) under conditions of relevance to practical combustors. The combination of shock tube and RCM data greatly expands the range of available validation data for isobutene oxidation models to pressures of 50 atm and temperatures in the range 666-1715 K. Isobutene flame speeds were measur...
http://hdl.handle.net/10379/6030
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A comprehensive experimental and modeling study of isobutene oxidation
(2018)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Ke...
A comprehensive experimental and modeling study of isobutene oxidation
(2018)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Keesee, Charles; Mathieu, Olivier; Petersen, Eric L.; DeVerter, Trent A.; Oehlschlaeger, Matthew A.; Kukkadapu, Goutham; Sung, Chih-Jen; Alrefae, Majed; Khaled, Fathi; Farooq, Aamir; Dirrenberger, Patricia; Glaude, Pierre-Alexandre; Battin-Leclerc, Frédérique; Santner, Jeffrey; Ju, Yiguang
http://hdl.handle.net/10379/14536
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A comprehensive iso-octane combustion model with improved thermochemistry and chemical kinetics
(2017)
Atef, Nour; Kukkadapu, Goutham; Mohamed, Samah Y.; Al Rashidi, Mariam J.; Al Rashidi, M...
A comprehensive iso-octane combustion model with improved thermochemistry and chemical kinetics
(2017)
Atef, Nour; Kukkadapu, Goutham; Mohamed, Samah Y.; Al Rashidi, Mariam J.; Al Rashidi, Mariam; Banyon, Colin; Mehl, Marco; Heufer, Karl Alexander; Nasir, Ehson F.; Alfazazi, A.; Das, Apurba K.; Westbrook, Charles K.; Pitz, William J.; Lu, Tianfeng; Farooq, Aamir; Sung, Chih-Jen; Curran, Henry J.; Sarathy, S. Mani
Abstract:
Iso-Octane (2,2,4-trimethylpentane) is a primary reference fuel and an important component of gasoline fuels. Moreover, it is a key component used in surrogates to study the ignition and burning characteristics of gasoline fuels. This paper presents an updated chemical kinetic model for iso-octane combustion. Specifically, the thermodynamic data and reaction kinetics of iso-octane have been re-assessed based on new thermodynamic group values and recently evaluated rate coefficients from the literature. The adopted rate coefficients were either experimentally measured or determined by analogy to theoretically calculated values. Furthermore, new alternative isomerization pathways for peroxy-alkyl hydroperoxide (OOQOOH) radicals were added to the reaction mechanism. The updated kinetic model was compared against new ignition delay data measured in rapid compression machines (RCM) and a high-pressure shock tube. These experiments were conducted at pressures of 20 and 40 atm, at equivale...
http://hdl.handle.net/10379/6872
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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
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A hierarchical single-pulse shock tube pyrolysis study of C-2-C-6 1-alkenes
(2020)
Nagaraja, Shashank S.; Liang, Jinhu; Dong, Shijun; Panigrahy, Snehasish; Sahu, Amrit; K...
A hierarchical single-pulse shock tube pyrolysis study of C-2-C-6 1-alkenes
(2020)
Nagaraja, Shashank S.; Liang, Jinhu; Dong, Shijun; Panigrahy, Snehasish; Sahu, Amrit; Kukkadapu, Goutham; Wagnon, Scott W.; Pitz, William J.; Curran, Henry J.
Abstract:
A single-pulse shock tube study of the pyrolysis of 2% C-2 - C-6 1-alkenes is presented at 2 bar in the tem-perature range 900-1800 K in the current study. Reactant, intermediate and product species are obtained and quantified using gas chromatography-mass spectrometry (GC-MS) analysis. MS is used for species identification and a flame ionization detector is used for quantification. The experiments show the effect of carbon chain length on the production of smaller C 1-C-3 fragments. A new detailed kinetic mechanism, NUIGMech1.0, is used to simulate the data and the predictions for the major species are satisfactory. The improvement in predictions of the current mechanism, which includes C-6 and C-7 species, is substantial compared to AramcoMech3.0. Kinetic analyses are conducted with the current mechanism to identify the formation and consumption pathways of the quantified species. The experimental data are expected to contribute to a database for the validation of mechanisms at py...
http://hdl.handle.net/10379/16217
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An experimental and kinetic modeling study of cyclopentane and dimethyl ether blends
(2021)
Lokachari, Nitin; Wagnon, Scott W.; Kukkadapu, Goutham; Pitz, William J.; Curran, Henry J.
An experimental and kinetic modeling study of cyclopentane and dimethyl ether blends
(2021)
Lokachari, Nitin; Wagnon, Scott W.; Kukkadapu, Goutham; Pitz, William J.; Curran, Henry J.
Abstract:
Cyclopentane is a suitable naphthene, or cycloalkane, in a palette for multi-component gasoline surro- gate fuels due to its presence in market fuels and its relevance to alkyl substituted cyclopentanes also present. However, the previous oxidation studies of cyclopentane have primarily focused on neat mixtures. Blending cyclopentane with dimethyl ether in this work therefore serves to inform our understanding of, and improve predictive models for, multi-component mixtures. In this work, the auto-ignition of cyclopentane/dimethyl ether blends was studied in a high-pressure shock tube and in a rapid compression machine. A wide range of temperatures (650 1350 K) and elevated pressures of 20 and 40 bar were studied at equivalence ratios of 0.5, 1.0 and 2.0 in air for two blending ratios (30/70 and 70/30 mole% cyclopentane/di-methyl ether mixtures). A detailed kinetic model for cyclopentane was revised to capture the measured ignition delay times and apparent heat release rates in this...
http://hdl.handle.net/10379/16483
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An experimental and kinetic modeling study of the oxidation of hexane isomers: Developing consistent reaction rate rules for alkanes
(2019)
Kuiwen, Zhang; Banyon, Colin; Burke, Ultan; Kukkadapu, Goutham; Wagnon, Scott W.; Mehl,...
An experimental and kinetic modeling study of the oxidation of hexane isomers: Developing consistent reaction rate rules for alkanes
(2019)
Kuiwen, Zhang; Banyon, Colin; Burke, Ultan; Kukkadapu, Goutham; Wagnon, Scott W.; Mehl, Marco; Curran, Henry J.; Westbrook, Charles K.; Pitz, William J.
Abstract:
Alkanes are key components in gasoline, jet and diesel fuels and considerably influence the combustion behavior of these fuels because of their wide range of reactivity. An improved understanding of their combustion behavior and the development of chemical kinetic models that can accurately simulate their combustion behavior are important for the development of next-generation internal-combustion and gas-turbine engines. The current work provides improved insight into oxidation mechanisms of a representative family of hydrocarbon fuels, specifically the hexane isomers: n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane and 2,3-dimethylbutane. These isomers provide carbon "skeletons" ranging from straight-chained to highly-branched and provide a framework for the subsequent development of kinetic mechanisms for larger alkanes. New ignition delay times for the four branched hexane isomers were measured in a high-pressure shock tube and in a rapid compression mach...
http://hdl.handle.net/10379/15429
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The influence of iso-butene kinetics on the reactivity of di-isobutylene and iso-octane
(2021)
Lokachari, Nitin; Panigrahy, Snehasish; Kukkadapu, Goutham; Gihun, Kim; Vasu, Subith S....
The influence of iso-butene kinetics on the reactivity of di-isobutylene and iso-octane
(2021)
Lokachari, Nitin; Panigrahy, Snehasish; Kukkadapu, Goutham; Gihun, Kim; Vasu, Subith S.; Pitz, William J.; Curran, Henry J.
Abstract:
The continuous development of a core C-0 - C-4 kinetic mechanism generally involves updating it using reliable kinetics and thermodynamics and may also involve the inclusion of missing reaction pathways to improve the integrity, prediction accuracy and applicability of the mechanism over a wider range of combustion relevant conditions. Accurate kinetic descriptions of the core mechanism can have a substantial influence on accurate predictions of higher hydrocarbon combustion models as the consumption of these larger species rely heavily on the core mechanism. This study is motivated by a severe under prediction in the reactivity of the high temperature experimental targets of di-isobutylene (DIB), an important component used in surrogate fuel formulations. It is worth noting that isobutene (iC(4)H(8)) laminar burning velocities are also severely under-predicted in the recent publication of Zhou et al. [1], which is regarded as a critical fragment formed in the decomposition of DIB, ...
http://hdl.handle.net/10379/16439
Displaying Results 1 - 9 of 9 on page 1 of 1
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