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Michael J. Brear
University of Melbourne
131Publications
16H-index
1,046Citations
Publications 131
Newest
#1Hao Yuan (University of Melbourne)H-Index: 2
#2Zhongyuan Chen (University of Melbourne)H-Index: 2
Last.James E. Anderson (Ford Motor Company)H-Index: 25
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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...
#1Davy Brouzet (University of Melbourne)
#2Ali Haghiri (University of Melbourne)H-Index: 5
Last.Michael J. Brear (University of Melbourne)H-Index: 16
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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: 6
#2Harjon Aditiya (University of Melbourne)
Last.Steve Ryan (Ford Motor Company)H-Index: 2
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#1Joshua Lacey (University of Melbourne)H-Index: 6
#2Marie Meulemans (University of Melbourne)
Last.Perry Czimmek (Continental AG)
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#1Abbas Ihsan (University of Melbourne)H-Index: 1
#2Matthew Jeppesen (University of Melbourne)H-Index: 7
Last.Michael J. Brear (University of Melbourne)H-Index: 16
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Abstract This paper presents a model to optimise the operation of a small-scale, grid-connected, hybrid power plant with and without demand response of the associated load. The model minimises the full cost of supplying electricity from a combination of solar photovoltaic, battery storage, a natural gas fuelled reciprocating engine generator and network delivered electricity, while satisfying several technical and environmental constraints. This includes the use of demand response, historical lo...
#1Hao Yuan (University of Melbourne)H-Index: 2
#2Zhewen Lu (University of Melbourne)H-Index: 1
Last.Thomas G. Leone (Ford Motor Company)H-Index: 11
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Abstract This paper presents a study of the oxidation of iso-octane, ethanol, toluene and their mixtures in a pressurised turbulent flow reactor operating at 900–930 K, 10 bar, and an equivalence ratio of 0.058. A large set of fuels is investigated, including neat iso-octane, ethanol, toluene, their binary mixtures, gasoline reference fuels (PRF91 and TRF91), and their mixtures with ethanol. The resulting species are measured along the length of the reactor and simulated using existing kinetic m...
#1Zhongyuan Chen (University of Melbourne)H-Index: 2
#2Hao Yuan (University of Melbourne)H-Index: 2
Last.Michael J. Brear (University of Melbourne)H-Index: 16
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Abstract Nitric oxide (NO) is a trace species that is always present in reciprocating engines, and can significantly affect fuel autoignition. This work presents a systematic investigation of the impact of NO on fuel autoignition in a standard, octane rating engine. Knock onset timing is investigated over a wide range of equivalence ratios, intake temperatures, and fuel compositions with increasing levels of NO added via the engine intake. NO is observed to both promote and retard autoignition i...
#1Zhewen Lu (University of Melbourne)H-Index: 1
#2Yi Yang (University of Melbourne)H-Index: 18
Last.Michael J. Brear (University of Melbourne)H-Index: 16
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Abstract This paper studies the oxidation of n-heptane, iso-octane, ethanol and their mixtures in a pressurized flow reactor, with a focus on the potential relation between the fuels oxidation reactivity and their octane ratings. The flow reactor experiments are conducted at 550–900 K, 10 bar and an equivalence ratio of 0.058. Carbon monoxide is measured as an indicator of the global reactivity. Evident low temperature oxidation and negative temperature coefficient (NTC) behaviors are observed f...
Nov 1, 2018 in ICARCV (International Conference on Control, Automation, Robotics and Vision)
#1Noam Olshina (University of Melbourne)
#2Chris Manzie (University of Melbourne)H-Index: 24
Last.Michael J. Brear (University of Melbourne)H-Index: 16
view all 4 authors...
In this paper, we develop a robust Economic Model Predictive Control (EMPC) formulation without terminal constraints for a class of time varying systems. We draw on recent research into EMPC for nominal time varying systems, and for uncertain systems which are optimally operated at steady state. A suitable notion of robust optimal operation and robust dissipativity for time varying systems is introduced. These, as well as turnpike arguments, are used to assess the controller's open loop performa...
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