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Modeling End-Gas Autoignition of Ethanol/Gasoline Surrogate Blends in the Cooperative Fuel Research Engine

Published on Mar 16, 2017in Energy & Fuels3.021
· DOI :10.1021/acs.energyfuels.6b02380
Tien Mun Foong6
Estimated H-index: 6
,
Michael J. Brear18
Estimated H-index: 18
+ 3 AuthorsFrederick L. Dryer68
Estimated H-index: 68
Source
Abstract
This paper presents an experimental and numerical investigation of the autoignition of ethanol blended with several primary reference fuels (PRFs) and toluene reference fuels (TRFs) in a Cooperative Fuel Research (CFR) engine. Autoigniting, in-cylinder pressure traces are acquired under standard research octane number (RON) conditions. Equivalent, non-autoignitiing traces are obtained by adding a small amount of tetraethyl lead (TEL) to each fuel to suppress knock, and these are used to calibrate a two-zone engine model of autoignition. The simulated autoignition timing of the PRFs without ethanol, TRFs without ethanol, and ethanol/PRF and ethanol/TRF blends are then compared to those measured in the engine. These results suggest that the incorporation of residual NO significantly improves the agreement between simulations and experiment for all cases with no or low ethanol content. Ethanol also appears to suppress the low-temperature activity of n-heptane. Both of these results are consistent with previo...
  • References (31)
  • Citations (13)
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References31
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#1Hao Yuan (University of Melbourne)H-Index: 3
#2Tien Mun Foong (University of Melbourne)H-Index: 6
Last. James E. Anderson (Ford Motor Company)H-Index: 27
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#2Murray J. Thomson (U of T: University of Toronto)H-Index: 34
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Abstract This paper investigates the autoignition of C 3 /C 4 hydrocarbon mixtures in a CFR octane rating engine. The four species examined – propane, propylene (propene), n -butane and iso -butane – are the primary constituents of Liquefied Petroleum Gas (LPG), and are also important intermediates in the oxidation of larger hydrocarbons. In-cylinder pressure data was acquired for both autoigniting and non-autoigniting engine operation at the same test conditions. The latter was used to calibrat...
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Abstract Alternative transportation fuels, preferably from renewable sources, include alcohols with up to five or even more carbon atoms. They are considered promising because they can be derived from biological matter via established and new processes. In addition, many of their physical-chemical properties are compatible with the requirements of modern engines, which make them attractive either as replacements for fossil fuels or as fuel additives. Indeed, alcohol fuels have been used since th...
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#2Tien Mun Foong (University of Melbourne)H-Index: 6
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This paper presents a combined experimental and numerical study of a modified Cooperative Fuel Research (CFR) engine that allows both the Research and Motor octane numbers (RON and MON) of any arbitrary Liquefied Petroleum Gas (LPG) mixture to be determined. The design of the modified engine incorporates modern hardware that enables accurate metering of different LPG mixtures, together with measurement of the in-cylinder pressure, the air-fuel ratio and the engine-out emissions. The modified CFR...
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The present study experimentally investigates spark-ignited combustion with 87 AKI E0 gasoline in its neat form and in midlevel alcohol–gasoline blends with 24% vol/vol isobutanol–gasoline (IB24) and 30% vol/vol ethanol–gasoline (E30). A single-cylinder research engine is used with an 11.85:1 compression ratio, hydraulically actuated valves, laboratory intake air, and was capable of external exhaust gas recirculation (EGR). Experiments were conducted with all fuels to full-load conditions with λ...
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The present study experimentally investigates spark-ignited combustion with 87 AKI E0 gasoline in its neat form and in midlevel alcohol–gasoline blends with 24% vol/vol isobutanol–gasoline (IB24) and 30% vol/vol ethanol–gasoline (E30). A single-cylinder research engine was used with an 11.85:1 compression ratio, hydraulically actuated valves, laboratory intake air, and was capable of external exhaust gas recirculation (EGR). Experiments were conducted with all fuels to full-load conditions with ...
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#1Tien Mun Foong (University of Melbourne)H-Index: 6
#2Kai Morganti (University of Melbourne)H-Index: 12
Last. Frederick L. Dryer (Princeton University)H-Index: 68
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#1Francesco Contino (Vrije Universiteit Brussel)H-Index: 15
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Abstract Small concentrations of very reactive chemical species such as nitric oxide (NO) have a very important impact on the onset of combustion. In engine applications, this may lead to irregular combustion phenomena in spark ignition engines or contribute to the control of the homogeneous charge compression ignition (HCCI) engines. To numerically analyze and predict the effect of these species, detailed chemical mechanisms are required. However, including these mechanisms in computational flu...
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#1Bang-Quan He (TJU: Tianjin University)H-Index: 3
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Biobutanol, i.e. n-butanol, is a promising alternative fuel or fuel blend to gasoline to reduce the consumption of fossil fuel and carbon dioxide emissions from spark ignition (SI) and homogeneous charge compression ignition (HCCI), also known as controlled autoignition (CAI), engines. In this work, investigation was conducted on a single cylinder port fuel injection four-stroke HCCI/CAI engine fuelled with gasoline (Bu0), the blend containing 30% n-butanol and 70% gasoline by volume (Bu30), and...
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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 ...
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