Ultan Burke
National University of Ireland, Galway
Publications 30
#1Kuiwen Zhang (LLNL: Lawrence Livermore National Laboratory)H-Index: 4
#2Colin Banyon (National University of Ireland, Galway)H-Index: 6
Last.William J. Pitz (LLNL: Lawrence Livermore National Laboratory)H-Index: 60
view all 9 authors...
The work by authors at LLNL was performed under the auspices of the U.S. Department of Energy (DOE), Contract DE-AC52-07NA27344 and was conducted as part of the Co-Optimization of Fuels & Engines (Co-Optima) project sponsored by the DOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies and Vehicle Technologies Offices. The research at NUIG received funding from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-20...
1 CitationsSource
#1Sascha Jacobs (RWTH Aachen University)H-Index: 1
#2Malte Döntgen (UH: University of Helsinki)H-Index: 5
Last.K. Alexander Heufer (RWTH Aachen University)H-Index: 5
view all 10 authors...
Abstract In this study (Part II), the oxidation of dimethoxymethane (DMM) is investigated and a detailed chemical reaction model developed for a comprehensive description of both high- and low-temperature oxidation processes. The sub-mechanism of DMM is implemented using AramcoMech2.0 as the base mechanism. Rate coefficients are based on analogies with those for dimethyl ether, diethyl ether, and n-pentane oxidation. Furthermore, theoretical studies from recent works are also included in the pre...
1 CitationsSource
#1Tamara Ottenwälder (RWTH Aachen University)H-Index: 2
#2Ultan Burke (RWTH Aachen University)H-Index: 10
Last.Stefan Pischinger (RWTH Aachen University)H-Index: 25
view all 9 authors...
In this paper, the potential of alternative fuels to reduce preignition in engines is primarily investigated. Two ketones (2-butanone and 3-methylbutanone), a furan (2-methylfuran), and five alcohols (ethanol, iso-propanol, 2-butanol, iso-butanol, and 1-propanol) are compared to three conventional fuels (RON95E0, RON95E10, and iso-octane). If the alternative fuels can reduce preignition significantly, the efficiency of spark-ignition engines can be potentially increased. One major aim is to cate...
#1Ultan Burke (National University of Ireland, Galway)H-Index: 10
#2Roya ShahlaH-Index: 4
Last.Henry J. Curran (National University of Ireland, Galway)H-Index: 62
view all 7 authors...
NUIG would like to thank Science Foundation Ireland (SFI) for the funding for this work via their Principal Investigator Program through project number 15/IA/3177. The research leading to these results has received funding from the European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013)/ERC grant agreement no. 291049−2G-CSafe.
#1Chong-Wen Zhou (Beihang University)H-Index: 15
#2Yang Li (National University of Ireland, Galway)H-Index: 6
Last.Henry J. Curran (National University of Ireland, Galway)H-Index: 62
view all 20 authors...
Abstract Ignition delay times for 1,3-butadiene oxidation were measured in five different shock tubes and in a rapid compression machine (RCM) at thermodynamic conditions relevant to practical combustors. The ignition delay times were measured at equivalence ratios of 0.5, 1.0, and 2.0 in ‘air’ at pressures of 10, 20 and 40 atm in both the shock tubes and in the RCM. Additional measurements were made at equivalence ratios of 0.3, 0.5, 1.0 and 2.0 in argon, at pressures of 1, 2 and 4 atm in a num...
22 CitationsSource
#1Rupali Tripathi (RWTH Aachen University)H-Index: 3
#2Ultan Burke (RWTH Aachen University)H-Index: 10
Last.Heinz Pitsch (RWTH Aachen University)H-Index: 53
view all 11 authors...
Abstract There have been significant advances in understanding ignition behavior of oxygenated biofuels (mainly alcohols) and their blends with conventional fuel components. However, the oxidation behavior of lignocellulosic derived furanic compounds blended with hydrocarbons has received little attention. The present work is an experimental and numerical investigation of 2-methylfuran (2-MF) combustion and its blend with n-heptane. These results are compared with pure n-heptane results to bette...
2 CitationsSource
#1Kieran P. Somers (National University of Ireland, Galway)H-Index: 13
#2Henry J. Curran (National University of Ireland, Galway)H-Index: 62
Last.Roger Cracknell (Royal Dutch Shell)H-Index: 29
view all 9 authors...
Abstract The significance of pyrolysis reactions in the early stages of diesel combustion has received little attention in the literature, which warrants a mechanistic investigation of the controlling chemistry along with its potential impacts on the overall combustion process in engines. Experiments were performed in a constant volume vessel to probe these pyrolytic reactions, where diesel fuel sprays were injected into air at varied pressures and temperatures chosen to represent an engine oper...
3 CitationsSource
#1Oguz Budak (RWTH Aachen University)H-Index: 2
#2Fabian Hoppe (RWTH Aachen University)H-Index: 5
Last.Alexander Heufer (RWTH Aachen University)H-Index: 6
view all 6 authors...
Two promising alternative fuel candidates for spark-ignition engines, 2-butanone and 2-methylfuran, have been identified in the context of the Cluster for Excellence ‘Tailor-Made Fuels from Biomass’. To further explore the potential of these fuels for spark-ignition engine application, experimental and numerical investigations into the occurrence of the abnormal combustion phenomenon of hot surface–induced pre-ignition have been conducted, with pure ethanol, RON97 E10, and pure iso-octane as ref...
4 CitationsSource
#1Christian Hemken (Bielefeld University)H-Index: 6
#2Ultan Burke (RWTH Aachen University)H-Index: 10
Last.Katharina Kohse-Höinghaus (Bielefeld University)H-Index: 49
view all 7 authors...
Abstract In view of a desired transition from fossil fuels to sustainably produced biofuels that should contribute to a net reduction of CO 2 emissions, promising fuel candidates have been identified including 2-butanone (methyl ethyl ketone, MEK) that is qualified for use in spark-ignition (SI) engines. To support a potential, rapid integration of such biofuels into the existing infrastructure, fundamental studies of their combustion and emission behavior are highly important. In the case of 2-...
13 CitationsSource
#1Wassja A. Kopp (RWTH Aachen University)H-Index: 7
#2Leif C. Kröger (RWTH Aachen University)H-Index: 6
Last.Kai Leonhard (RWTH Aachen University)H-Index: 18
view all 8 authors...
Abstract Despite the great interest in oxygenated methyl ethers as diesel fuel additives and as fuels themselves, the influence of their methylenedioxy group(s) (O–CH 2 –O) has never been quantified using ab initio methods. In this study we elucidate the kinetics and thermochemistry of dimethoxymethane using high-level ab initio (CCSD(T)/aug-cc-pV(D+T)Z//B2PLYPD3BJ/6-311++g(d,p)) and statistical mechanics methods. We model torsional modes as hindered rotors which has a large influence on the des...
6 CitationsSource