Shock tube measurements and kinetic study on ignition delay times of lean DME-n-butane blends at elevated pressures (PDF)
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Shock tube measurements and kinetic study on ignition delay times of lean DME-n-butane blends at elevated pressures (PDF)
- 发表刊物：
- Energy & Fuels
- 摘要：
- In this study, the ignition delay times of lean DME/n-C4H10 fuel blends diluted with argon were measured behind reflect shock waves over a wide range of conditions: pressures from 0.2 to 2.0 MPa, temperatures from 1100 to 1600 K, and DME blending ratios from 0 to 100%. Results show that for all the mixtures, an increase in pressure significantly promotes the ignition of the fuel blends. An empirical Arrhenius correlation with high fidelity was proposed and was used to calculate the ignition delay times of DME/n-C4H10. Under the fuel-lean condition, both neat DME and neat n-C4H10 present almost uniform global activation energy. For a given temperature and/or pressure, the ignition delay time is considerably insensitive to the change of DME blending ratio. Comparison between the predictions by five available kinetic mechanisms and the measured ignition delay times were made, where the NUIG Aramco Mech 1.3 gave the excellent prediction for all the tested mixtures. Here, NUIG Aramco Mech 1.3 was used to make the kinetic analysis including fuel flux analysis, sensitivity analysis and mole fraction analysis of key radicals, and to interpret the effect of DME addition on the ignition chemistry of n-C4H10.
- 合写作者：
- Jiang X, Zhang YJ, Man XJ, Pan L, Huang ZH
- 卷号：
- 2013, 27(10): 6238-6246
- 页面范围：
- 6238-6246
- 是否译文：
- 否
- 发表时间：
- 2013-10-16