Michael J. Brear
University of Melbourne
EngineeringControl engineeringAutomotive engineeringChemistryControl theory
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Publications 172
Abstract This paper examines the impact of progressively deeper levels of wind generation and/or abatement on the performance of a wholesale market and its incumbent thermal generators with non-convex unit commitment constraints. Comparison is made to the result that marginal cost pricing should induce investors to build the least-cost capacity mix, since it is not clear that this will hold in renewable-rich systems. It is first found that unit commitment and forecast uncertainty do not cause si...
#1Song ChengH-Index: 1
#2Yi YangH-Index: 18
Last. Michael FrenklachH-Index: 55
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Abstract Combustion chemistry models have been developed with inherent uncertainties in them. Whether a model that is developed using fundamental combustion experiments is capable to reproduce practical combustion processes within typical levels of measurement uncertainty is an open question. This paper quantifies the uncertainty of engine autoignition simulation using the uncertainties in the selected chemical kinetic model and then minimizes the model prediction uncertainty using various exper...
#2Ali HaghiriH-Index: 5
Last. Tim ColoniusH-Index: 42
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Spectral proper orthogonal decomposition (SPOD) is applied to direct numerical simulation datasets of a lean and a stoichiometric methane–air turbulent premixed jet flame. SPOD is used to extract t...
#1Zhewen Lu (University of Melbourne)H-Index: 2
#2Yi Yang (University of Melbourne)H-Index: 18
Last. Michael J. Brear (University of Melbourne)H-Index: 18
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Abstract This paper investigates the impact of ethanol on the oxidation of iso-octane at low and intermediate temperatures. Flow reactor experiments are conducted on binary mixtures ranging from neat iso-octane to neat ethanol at temperatures of 650 K and 875 K, a pressure of 10 bar and an equivalence ratio of 0.058, with the intermediate species and gas temperatures measured along the reactor. At 650 K, where neat iso-octane is near the peak of its low temperature chain branching, the addition ...
#1Ali Haghiri (University of Melbourne)H-Index: 5
#2Mohsen Talei (University of Melbourne)H-Index: 11
Last. Evatt R. Hawkes (UNSW: University of New South Wales)H-Index: 32
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This paper examines the dynamics of flame annihilation in turbulent premixed flames using a DNS dataset of Haghiri et al. (J. Fluid Mech. 843, 29 2018). Two theoretical frameworks are considered. The relative contributions of the reaction rate, normal diffusion and flame curvature to the flame displacement speed are first considered. A revised form of Markstein’s theory describing the displacement speed as a function of the local Karlovitz number is then used, including consideration of the rela...
#1Hao Yuan (University of Melbourne)H-Index: 3
#2Zhongyuan Chen (University of Melbourne)H-Index: 2
Last. James E. Anderson (Ford Motor Company)H-Index: 27
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Abstract This work develops a surrogate fuel that reproduces the octane blending of a market gasoline with ethanol. It first extends our previous investigation that reported strong, non-linear blending for ethanol/paraffin and ethanol/aromatic mixtures (Foong et al., Fuel 2014 p. 727) to consider mixtures of ethanol/cycloparaffin, ethanol/olefin, and hydrocarbons from different groups. On the molar basis, ethanol blends synergistically with cyclohexane and 1-hexene, whereas toluene blends antago...
2 CitationsSource
#1Davy Brouzet (University of Melbourne)
#2Ali Haghiri (University of Melbourne)H-Index: 5
Last. Michael J. Brear (University of Melbourne)H-Index: 18
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Abstract This paper studies the contribution of flame annihilation events to the sound radiated by turbulent, premixed flames. Previously published direct numerical simulation (DNS) datasets of stoichiometric and lean ( ϕ = 0.7 ) flames (Haghiri et al. 2018) are first examined using an efficient formulation of the method of Griffiths et al. (2015) to identify the annihilation events. Four classes of annihilation event are observed. Three of these - pocket burn-out, tunnel closure and tunnel form...
#1Joshua Lacey (University of Melbourne)H-Index: 7
#2Harjon Aditiya (University of Melbourne)
Last. Steve Ryan (Ford Motor Company)H-Index: 2
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This article presents an experimental and thermodynamic analysis of the direct injection of propane in an optically accessible variant of a downsized production engine. Propane is used as a surroga...
1 CitationsSource
#1Joshua Lacey (University of Melbourne)H-Index: 7
#2Marie Meulemans (University of Melbourne)
Last. Perry Czimmek (Continental AG)
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© 2019 SAE International; Ford Motor Company. All rights reserved. Compressed natural gas (CNG) is an attractive, alternative fuel for spark-ignited (SI), internal combustion (IC) engines due to its high octane rating, and low energy-specific CO 2 emissions compared with gasoline. Directly-injected (DI) CNG in SI engines has the potential to dramatically decrease vehicles' carbon emissions; however, optimization of DI CNG fueling systems requires a thorough understanding of the behavior of CNG j...