Experimental and kinetic study on ignition delay times of DME/n-butane/O2/Ar mixtures (PDF)
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Experimental and kinetic study on ignition delay times of DME/n-butane/O2/Ar mixtures (PDF)
- 发表刊物：
- Energy & Fuels
- 摘要：
- Ignition delay times of stoichiometric dimethyl ether (DME) and n-butane blends were measured using shock tube at varied DME blending ratios (0%, 30%, 70%, 100%), temperatures (1200-1600 K) and pressures (1.2-5.3 atm). Simulation work was conducted using the Chemkin code with NUI C4_47 mechanism. Correlations of ignition delay times were obtained based on the measured data through multiple linear regressions. Results show that the ignition delay times increase linearly with the increase of 1000/T and this indicates that the overall activation energy keeps unchanged at the conditions in the study. Increasing pressure decreases the ignition delay time. Ignition delay time decreases with the increase of DME blending ratio. The peak mole fractions of H and OH radicals increase, and the timing at peak value of H and OH radicals advances as DME increases. Analysis on the reaction pathway shows that, at high temperature, the H-abstraction reactions play a dominant role in the consumption of fuel rather than the unimolecular decomposition reactions. At high temperature, chemical reactions of two fuel components are independent. Sensitivity analysis shows that the dominant reactions affecting ignition delay time are the reactions that mainly the participation of small molecules.
- 合写作者：
- Hu EJ, Jiang X, Huang ZH, Zhang JX
- 卷号：
- 2013, 27(1): 530-536
- 页面范围：
- 530-536
- 是否译文：
- 否
- 发表时间：
- 2013-01-18