首页|A reduced combustion mechanism of ammonia/diesel optimized with multi-objective genetic algorithm

A reduced combustion mechanism of ammonia/diesel optimized with multi-objective genetic algorithm

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For the deep understanding on combustion of ammonia/diesel,this study develops a reduced mecha-nism of ammonia/diesel with 227 species and 937 reactions.The sub-mechanism on ammonia/in-teractions of N-based and C-based species(N-C)/NOx is optimized using the Non-dominated Sorting Genetic Algorithm Ⅱ(NSGA-Ⅱ)with 200 generations.The optimized mechanism(named as 937b)is validated against combustion characteristics of ammonia/methane(which is used to examine the ac-curacy of N-C interactions)and ammonia/diesel blends.The ignition delay times(IDTs),the laminar flame speeds and most of key intermediate species during the combustion of ammonia/methane blends can be accurately simulated by 937b under a wide range of conditions.As for ammonia/diesel blends with various diesel energy fractions,reasonable predictions on the IDTs under pressures from 1.0 MPa to 5.0 MPa as well as the laminar flame speeds are also achieved by 937b.In particular,with regard to the IDT simulations of ammonia/diesel blends,937b makes progress in both aspects of overall accuracy and computational efficiency,compared to a detailed ammonia/diesel mechanism.Further kinetic analysis reveals that the reaction pathway of ammonia during the combustion of ammonia/diesel blend mainly differs in the tendencies of oxygen additions to NH2 and NH with different equivalence ratios.

AmmoniaDieselCombustionKinetic mechanismMulti-objective optimization

Wanchen Sun、Shaodian Lin、Hao Zhang、Liang Guo、Wenpeng Zeng、Genan Zhu、Mengqi Jiang

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State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130025,China

国家自然科学基金Jilin Province Natural Science FoundationJilin Province Natural Science FoundationJilin Province Specific Project of Industrial Technology Research and DevelopmentInterdisciplinary Integration and Innovation Project of Jilin University(2021)Free Exploration Project of Changsha Automotive Innovation Research Institute of Jilin University

5220247020220101205JC20220101212JC2020C025-2XJRCYB07CAIRIZT20220202

2024

10.1016/j.dt.2023.11.008

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.34(4)