Journal
ENERGIES
Volume 11, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/en11061470
Keywords
mechanism reduction; ozone-enhanced; skeletal mechanism; global mechanism
Categories
Funding
- National Natural Science Foundation of China [51390491, 51706200, 51776185, 51422605]
- China Postdoctoral Science Foundation [2018M632460]
- Fundamental Research Funds for the Central Universities [2018FZA4012]
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In this study, an 18-steps, 22-species reduced global mechanism for ozone-enhanced CH4/air combustion processes was derived by coupling GRI-Mech 3.0 and a sub-mechanism for ozone decomposition. Three methods, namely, direct relation graphics with error propagation, (DRGRP), sensitivity analysis (SA), and quasi-steady-state assumption (QSSA), were used to downsize the detailed mechanism to the global mechanism. The verification of the accuracy of the skeletal mechanism in predicting the laminar flame speeds and distribution of the critical components showed that that the major species and the laminar flame speeds are well predicted by the skeletal mechanism. However, the pollutant NO was predicated inaccurately due to the precursors for generating NO were removed as redundant components. The laminar flame speeds calculated by the global mechanism fit the experimental data well. The comparisons of simulated results between the detailed mechanism and global mechanism were investigated and showed that the global mechanism could accurately predict the major and intermediate species and significantly reduced the time cost by 72%.
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