Laminar burning velocities, CO, and NOx emissions of premixed polyoxymethylene dimethyl ether flames

Eckart, Sven; Cai, Liming; Fritsche, Chris; Lehn, Florian vom; Pitsch, Heinz; Krause, Hartmut

doi:10.1016/j.fuel.2021.120321

Cited by 45 publications

(31 citation statements)

References 24 publications

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“…Sun et al [7] have measured the LBV of OME 3 at 408 K and 1 atm with the peak value found at ϕ = 1.2 as well. The same findings were observed within the different studies of OME 2 from Eckart et al [8] and Ngugi et al [9], who have presented LBV values at various temperatures and pressures ranging, in total, from 383 K to 473 K and from 1 bar to 6 bar.…”

Section: Results Of the Laminar Burning Velocitysupporting

confidence: 86%

“…To the best of our knowledge, experimental LBV data of OME 4 are presented for the first time; thus, allowing only for a comparison to literature data with other OME n . In general, measurements of higher OME n (n ≥ 2) have been published by Sun et al [7], Eckart et al [8], and Ngugi et al [9]. Sun et al [7] have measured the LBV of OME 3 at 408 K and 1 atm with the peak value found at ϕ = 1.2 as well.…”

Section: Results Of the Laminar Burning Velocitymentioning

confidence: 96%

“…Regarding experimental studies focusing on the combustion properties of higher OME n (n ≥ 2), only a limited database is available in literature. Particularly, data for their laminar burning velocities are rare-in 2017 Sun et al [7] published measurements of OME 3 at 1 atm and 408 K; recently, those of OME 2 were studied by Eckart et al [8] and Ngugi et al [9] at various temperatures and pressures. Though engine tests are often performed, e.g., such as those reported in Omari et al [5] and Pélerin et al [6], basic studies focusing on the sooting behavior are rare.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Oxymethylene Ethers (OMEn) in Mixtures with a Diesel Surrogate

et al. 2021

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Within this work the effects of blending oxymethylene ethers (OMEn) to a diesel surrogate (50 mol% n-dodecane, 30 mol% farnesane, and 20 mol% 1-methylnaphthalene) were investigated by performing two different types of experiments: measurements of the sooting propensity and of the laminar burning velocity, each in laminar premixed flames. For the sooting propensity, OME3, OME4, and OME5 were considered as blending compounds—each in mass fractions of 10%, 20%, and 30%. The sooting propensity was found to depend strongly on the OMEn blending grade but not on its chain length. In addition, the effect on the laminar burning velocity was studied for OME4 and the admixture of 30% OME4 with diesel surrogate for the first time. This admixture was found to lead to increased burning velocities; however, much less than might be foreseen when considering the respective values of the neat fuels.

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Section: Results Of the Laminar Burning Velocitysupporting

confidence: 86%

Section: Results Of the Laminar Burning Velocitymentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Influence of Oxymethylene Ethers (OMEn) in Mixtures with a Diesel Surrogate

et al. 2021

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“…A typical number of grid points of around 1200 with respect to the gradient and curvature adaptive mesh parameters of GRAD = 0.02–0.04 and CURV = 0.05–0.08 were used. Further details are explained in Eckart et al…”

Section: Numerical Methodsmentioning

confidence: 99%

“…A typical number of grid points of around 1200 with respect to the gradient and curvature adaptive mesh parameters of GRAD = 0.02−0.04 and CURV = 0.05−0.08 were used. Further details are explained in Eckart et al 62 Detailed Reaction Mechanism. AramcoMech 3.0 41 and its previous versions are based on several submechanisms such as a H 2 and CO reaction mechanism 63 and a C1−C2 reaction mechanism also including C 2 H 5 OH.…”

Section: ■ Numerical Methodsmentioning

confidence: 99%

Experimental Investigation of Ethanol Oxidation and Development of a Reduced Reaction Mechanism for a Wide Temperature Range

et al. 2021

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Rapid compression machine, shock-tube, plug-flow reactor, and heat-flux burner experiments were performed for stoichiometric and fuel-rich ethanol/air mixtures. The experimental ignition delay time conditions included temperatures from 801 to 1313 K at pressures of approximately 10, 20, and 40 bar. Species concentration profiles are measured in a range from 423 to 973 K at a pressure of 6 bar, and laminar burning velocities are measured in a range of 358–388 K at a pressure of 1 bar. The experimental results were simulated using the detailed reaction mechanism AramcoMech 3.0, showing that this mechanism is well suited even for the large range of experimental conditions covered in our work. Furthermore, a reduced mechanism was developed and validated with our experimental data. The sarting point for the reduced mechanism is an already existing reduced reaction mechanism (UCB Chen) for methane, ethane, and propane oxidations. Additional reactions for the ethanol subsystem were taken from AramcoMech 3.0. They were chosen according to their importance in representing the experimental data in simulations with the detailed AramcoMech 3.0, resulting in four additional species and 27 additional reactions. The performance of the reduced mechanism was compared against experimental results from this work, from the literature, and against simulations based on the detailed reaction mechanism. The reduced mechanism shows only minor differences in the results compared to the detailed AramcoMech 3.0. It reproduces very well experimentally with determined ignition delay times of ethanol/argon/nitrogen/oxygen mixtures with inert gas/oxygen ratios between 3.76 and 7.52 (molar), equivalence ratios between 1 and 2 in a temperature range from 848 to 1313 K, and pressures from 10 to 40 bar. Furthermore, it can also predict with a high accuracy laminar burning velocities and species profiles in plug-flow reactors.

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