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Title: Experimental Investigation and Benchmark Study of Oxidation of Methane–Propane–n-Heptane Mixtures at Pressures up to 100 bar
Authors: Schuh, Sebastian 
Ramalingam, Ajoy Kumar 
Minwegen, Heiko 
Heufer, Karl Alexander 
Winter, Franz 
Keywords: methane–propane–n-heptane mixtures;dual fuel concept;rapid compression machine;shock tube;ignition delay time
Issue Date: 2019
Publisher: MDPI
Source: Energies, 12(18), 3410
Journal: Energies 
Abstract: Dual fuel combustion exhibits a high degree of complexity due to the presence of different fuels like diesel and natural gas in initially different physical states and a spatially strongly varying mixing ratio. Optimizing this combustion process on an engine test bench is costly and time consuming. Cost reduction can be achieved by utilizing simulation tools. Although these tools cannot replace the application of test benches completely, the total development costs can be reduced by an educated combination of simulations and experiments. A suitable model for describing the reactions taking place in the combustion chamber is required to correctly reproduce the dual fuel combustion process. This is why in the presented study, four different reaction mechanisms are benchmarked to shock tube (ST) and rapid compression machine (RCM) measurements of ignition delay times (IDTs) at pressures between 60 and 100 bar and temperatures between 671 and 1284 K. To accommodate dual fuel relevant diesel-natural gas mixtures, methane–propane–n-heptane mixtures are considered as the surrogate. Additionally, the mechanisms AramcoMech 1.3, 2.0 and 3.0 are tested for methane–propane mixtures. The influence of pressure and propane/n-heptane content on the IDT based on the measurements is presented and the extent to which the mechanisms can reflect the IDT-changes discussed.
ISSN: 1996-1073
DOI: 10.3390/en12183410
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:Schwerpunkt Energie & Umwelt

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