Experimental and modeling study on auto-ignition characteristics of methane/hydrogen blends under engine relevant pressure (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 modeling study on auto-ignition characteristics of methane/hydrogen blends under engine relevant pressure (PDF)
- 发表刊物：
- Int J Hydrogen Energy
- 摘要：
- Auto-ignition characteristics of methane/hydrogen mixtures with hydrogen mole fraction varying from 0 to 100% were experimentally studied using a shock tube. Test pressure is kept 1.8 MPa and temperatures behind reflected shock waves are in the range of 900 to 1750 K and equivalence ratios from 0.5 to 2.0. Three ignition regimes are identified according to hydrogen fraction. They are, methane chemistry dominating ignition (XH2 < 40%), combined chemistry of methane and hydrogen dominating ignition (XH2 = 60%), and hydrogen chemistry dominating ignition (XH2 > 80%). Simulated ignition delays using four models including USC Mech 2.0, GRI Mech 3.0, UBC Mech 2.1 and NUI Galway Mech were compared to the experimental data. Results show that USC Mech 2.0 gives the best prediction on ignition delays and it was selected to conduct sensitivity analysis for three typical methane/hydrogen mixtures at different temperatures. The results suggest that at high temperature, ignition delay mainly is governed by chain branching reaction H + O2 OH + O, and thus increasing equivalence ratio inhibits ignition of methane/hydrogen mixtures. At middle-low temperature, contribution of equivalence ratio on ignition delay of methane/hydrogen mixtures is mainly due to chemistries of HO2 and H2O2 radicals.
- 合写作者：
- Zhang YJ, Wei LJ, Man XJ, Jiang X, Huang ZH
- 卷号：
- 2012, 37(24): 19168-19176
- 页面范围：
- 19168-19174
- 是否译文：
- 否
- 发表时间：
- 2012-11-20