High-pressure methane oxidation behind reflected shock waves

Petersen, Eric L.; Röhrig, Michael; Davidson, David F.; Hanson, Ronald K.; Bowman, Craig T.

doi:10.1016/s0082-0784(96)80289-x

Cited by 84 publications

(40 citation statements)

References 18 publications

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“…Petersen et al [19] measured highpressure (33-87 atm) H 2 /O 2 /Ar reflected shock ignition delays at 1189-1876 K and at an equivalence ratio of 1.0 in every case for six mixtures. Petersen et al [20] …”

Section: Ignition Delays In Shock Wavesmentioning

confidence: 99%

A comprehensive modeling study of hydrogen oxidation

Conaire

Curran

Simmie

et al. 2004

Int J of Chemical Kinetics

952

538

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A detailed kinetic mechanism has been developed to simulate the combustion of H 2 /O 2 mixtures, over a wide range of temperatures, pressures, and equivalence ratios. Over the series of experiments numerically investigated, the temperature ranged from 298 to 2700 K, the pressure from 0.05 to 87 atm, and the equivalence ratios from 0.2 to 6.Ignition delay times, flame speeds, and species composition data provide for a stringent test of the chemical kinetic mechanism, all of which are simulated in the current study with varying success. A sensitivity analysis was carried out to determine which reactions were dominating the H 2 /O 2 system at particular conditions of pressure, temperature, and fuel/oxygen/diluent ratios. Overall, good agreement was observed between the model and the wide range of experiments simulated. C

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Section: Ignition Delays In Shock Wavesmentioning

confidence: 99%

A comprehensive modeling study of hydrogen oxidation

Conaire

Curran

Simmie

et al. 2004

Int J of Chemical Kinetics

952

538

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“…The chemical kinetics was evaluated by comparison to some of the many shock tube experiments that have been carried out on methane oxidation [20][21] [22]. The experiments were simulated with the constant volume approximation (Eq.…”

Section: Comparison To Shock Tube Experiments -mentioning

confidence: 99%

Supercharged Homogeneous Charge Compression Ignition

Christensen¹,

Johansson²,

Amnéus

et al. 1998

SAE Technical Paper Series

297

150

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The Homogeneous Charge Compression Ignition (HCCI) is the third alternative for combustion in the reciprocating engine. Here, a homogeneous charge is used as in a spark ignited engine, but the charge is compressed to auto-ignition as in a diesel. The main difference compared with the Spark Ignition (SI) engine is the lack of flame propagation and hence the independence from turbulence. Compared with the diesel engine, HCCI has a homogeneous charge and hence no problems associated with soot and NO X formation. Earlier research on HCCI showed high efficiency and very low amounts of NO X , but HC and CO were higher than in SI mode. It was not possible to achieve high IMEP values with HCCI, the limit being 5 bar. Supercharging is one way to dramatically increase IMEP. The influence of supercharging on HCCI was therefore experimentally investigated. Three different fuels were used during the experiments: isooctane, ethanol and natural gas. Two different compression ratios were used, 17:1 and 19:1. The inlet pressure conditions were set to give 0, 1 or 2 bar of boost pressure. The highest attainable IMEP was 14 bar using natural gas as fuel at the lower compression ratio. The limit in achieving even higher IMEP was set by the high rate of combustion and a high peak pressure.Numerical calculations of the HCCI process have been performed for natural gas as fuel. The calculated ignition timings agreed well with the experimental findings. The numerical solution, is however, very sensitive to the composition of the natural gas.

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“…These studies cover a wide range of conditions including low-to-high temperatures and pressures. Of these previous ignition delay time studies [26][27][28][29][30][31][32][33][34][35][36][37], only the work of Tang et al [37] included mixtures of CH 4 and DME. It covered dilute mixtures within a pressure range of 1 − 10 atm.…”

Section: Introductionmentioning

confidence: 99%

An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures

Burke

Somers

O’Toole

et al. 2015

Combustion and Flame

Self Cite

397

279

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The development of accurate chemical kinetic models capable of predicting the combustion of methane and dimethyl ether in common combustion environments such as compression ignition engines and gas turbines is important as it provides valuable data and understanding of these fuels under conditions that are difficult and expensive to study in the real combustors. In this work, both experimental and chemical kinetic model-predicted ignition delay time data are provided covering a range of conditions relevant to gas turbine environments (T = 600 − 1600 K, p = 7 − 41 atm, φ = 0.3, 0.5, 1.0, and 2.0 in 'air' mixtures). The detailed chemical kinetic model (Mech 56.54) is capable of accurately predicting this wide range of data, and it is the first mechanism to incorporate high-level rate constant measurements and calculations where available for the reactions of DME. This mechanism is also the first to apply a pressure-dependent treatment to the low-temperature reactions of DME. It has been validated using available literature data including flow reactor, jet-stirred reactor, shock-tube ignition delay times, shock-tube speciation, flame speed, and flame speciation data. New ignition delay time measurements are presented for methane, dimethyl ether, and their mixtures; these data were obtained using three different shock tubes and a rapid compression machine. In addition to the DME/CH 4 blends, high-pressure data for pure DME and pure methane were also obtained. Where possible, the new * address:

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High-pressure methane oxidation behind reflected shock waves

Cited by 84 publications

References 18 publications

A comprehensive modeling study of hydrogen oxidation

A comprehensive modeling study of hydrogen oxidation

Supercharged Homogeneous Charge Compression Ignition

An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures

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