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- W2890181415 abstract "Iso-cetane (2, 2, 4, 4, 6, 8, 8-heptamethylnonane) is known as a primary reference fuel for cetane number rating and is regarded as an applicable component for surrogate diesel fuel. In this study, ignition delays for iso-cetane homogeneous mixture were measured at equivalence ratios varying from 0.5 to 2.0, compressed pressures of 10, 15 and 20 bar, and compressed temperatures of 620–880 K in a heated rapid compression machine (RCM). Two-stage ignition characteristic of iso-cetane was observed for all mixtures. Negative temperature coefficient (NTC) behavior of iso-cetane ignition delay appears in the temperature range of 670–730 K, which is significantly lower than that of other large hydrocarbons. Influences of compressed temperature, compressed pressure, and mixture composition on iso-cetane ignition delays were also investigated. It is found that the total ignition delays shorten with the increase of compressed pressure, equivalence ratio and oxygen mole fraction. The first-stage ignition delays exhibit Arrhenius-like dependence on compressed temperature and are relatively insensitive to the change of other parameters. In addition, modeling study was conducted using an updated iso-cetane kinetic model developed from a literature iso-cetane mechanism. Simulation results show that the total ignition delays are underestimated while the temperature range of the NTC behavior is overestimated. Rate of production (ROP) analysis prior to the first-stage ignition was also conducted to identify the controlling reactions generating and consuming OH and HO2 radicals in low-temperature (low-T) reaction pathways." @default.
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- W2890181415 date "2019-01-01" @default.
- W2890181415 modified "2023-10-11" @default.
- W2890181415 title "A study on the low-to-intermediate temperature ignition delays of long chain branched paraffin: Iso-cetane" @default.
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- W2890181415 doi "https://doi.org/10.1016/j.proci.2018.08.039" @default.
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