Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (5): 1264-1271.doi: 10.13229/j.cnki.jdxbgxb.20210877

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Development and validation of reduced combustion mechanism for gasoline/butanol blends

De-lin LYU1(),Chao ZHOU1,Dong HAN1,2()   

  1. 1.Key Laboratory for Power Machinery and Engineering，Ministry of Education，Shanghai Jiao Tong University，Shanghai 200240，China
    2.Shanghai Non-carbon Energy Conversion and Utilization Institute，Shanghai 200240，China
  • Received:2021-09-05 Online:2023-05-01 Published:2023-05-25
  • Contact: Dong HAN E-mail:delin.lv@sjtu.edu.cn;dong_han@sjtu.edu.cn

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Abstract:

A reduced combustion mechanism of gasoline/butanol blends containing 425 elementary reactions and 96 species was developed using direct relation graph with error propagation and sensitivity analysis， based on a detailed mechanism of gasoline/butanol containing 7714 elementary reactions and 1765 species. In this reduced mechanism， i-butanol， n-butanol， t-butanol and s-butanol sub-mechanisms are included， and the n-heptane/iso-octane/toluene mixtures are used as the gasoline model fuel. The ignition delay times， species concentration profiles and laminar flame speeds predicted by the reduced mechanism were compared with those predicted by the detailed mechanism and experimental data， with satisfactory agreement being observed. Finally， this reduced mechanism was used in a three-dimension computational fluid dynamics software CONVERGE to simulate the combustion processes of a spark-ignited engine fueled with gasoline/butanol blends. The results showed that the in-cylinder combustion behaviors in this spark-ignited engine could be well captured by this reduced mechanism.

Key words: energy and power engineering, reduced mechanism, chemical kinetics, gasoline/butanol blends, engines

CLC Number: 

  • TK411

Fig.1

Sensitivity analysis of ignition delays for gasoline/butanol blends under equivalence ratio of 1 and temperatures of 750， 950 and 1050K"

Fig.2

Comparison of simulated and measured ignition delays"

Fig.3

Ignition delays predicted by detailed and reduced mechanisms"

Fig.4

Species concentration predicted by detailed and reduced mechanisms"

Fig.5

Laminar flame speed predicted by reduced and detailed mechanism"

Fig.6

Experimental and simulated values of pressure and heat release rate in the cylinder"

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