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国际清洁环境能源期刊

每年出版 8 

ISSN 打印: 2150-3621

ISSN 在线: 2150-363X

SJR: 0.597 SNIP: 1.456 CiteScore™:: 3.7 H-Index: 18

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OPTIMIZATION OF A SURROGATE REDUCED AVIATION FUEL-AIR REACTION MECHANISM USING A GENETIC ALGORITHM

卷 8, 册 1, 2007, pp. 1-24
DOI: 10.1615/InterJEnerCleanEnv.v8.i1.10
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摘要

This study investigates reducing an existing detailed aviation fuel-air reaction mechanism based on identifying the most important reactions using a rate of production analysis. A genetic algorithm (GA) approach is then used to determine new reaction rate parameters (As, βs, and Eas in the Arrhenius expressions) that recover the mechanism's ability to predict experimentally determined species and ignition delay profiles. The GA does not blindly produce mechanisms that reproduce any given profile; instead, the reaction rate coefficients are confined to lie within physically realistic bounds associated with the National Institute of Standards and Technology database. This leads to mechanisms that can be applied to combustion problems that lie outside those used in the optimization process. A new multiobjective function has been developed that allows the GA to fit both ignition delay and premix flame data. This allows the substantial amount of existing experimental data to be incorporated into the mechanism validation procedure, thus improving the predictive capabilities of the mechanisms that are being developed. This study provides a reduced aviation fuel-air reaction scheme whose overall performance in predicting experimental major species profiles and ignition delay times is comparable to that of the original detailed starting mechanism.

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