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Study of knock in a high compression ratio spark-ignition methanol engine by multi-dimensional simulation

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  • Zhen, Xudong
  • Wang, Yang
  • Xu, Shuaiqing
  • Zhu, Yongsheng

Abstract

Methanol as an alternative fuel is considered to be one of the most favorable fuels for internal combustion engines. In this paper, knock in a high compression ratio spark-ignition (SI) methanol engine was studied by using multi-dimensional simulation. Knocking combustion under various engine operating conditions were simulated, and the effects of spark timing, EGR (Exhaust Gas Recirculation) techniques, mixture concentration and combustion chamber shape for suppressing knock in a high compression ratio spark-ignition methanol engine were studied based on the multi-dimensional simulation analysis. The results showed that it could not fully suppress engine knock only by retarding spark timing methods because of the high compression ratio, with the increase of EGR rate, the knock intensity was found to be greatly suppressed and the peak pressure was reduced and postponed. Meanwhile, knock intensity had a maximum point, rich mixture and lean mixture can help reduce knock intensity and the knock occurrence timing was delayed. Finally, in order to reduce engine knock intensity, two feasible new combustion chambers were proposed.

Suggested Citation

  • Zhen, Xudong & Wang, Yang & Xu, Shuaiqing & Zhu, Yongsheng, 2013. "Study of knock in a high compression ratio spark-ignition methanol engine by multi-dimensional simulation," Energy, Elsevier, vol. 50(C), pages 150-159.
    • Handle: RePEc:eee:energy:v:50:y:2013:i:c:p:150-159
    DOI: 10.1016/j.energy.2012.09.062
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    1. Balki, Mustafa Kemal & Sayin, Cenk, 2014. "The effect of compression ratio on the performance, emissions and combustion of an SI (spark ignition) engine fueled with pure ethanol, methanol and unleaded gasoline," Energy, Elsevier, vol. 71(C), pages 194-201.
    2. Gong, Changming & Liu, Jiajun & Peng, Legao & Liu, Fenghua, 2017. "Numerical study of effect of injection and ignition timings on combustion and unregulated emissions of DISI methanol engine during cold start," Renewable Energy, Elsevier, vol. 112(C), pages 457-465.
    3. Gong, Changming & Liu, Fenghua & Sun, Jingzhen & Wang, Kang, 2016. "Effect of compression ratio on performance and emissions of a stratified-charge DISI (direct injection spark ignition) methanol engine," Energy, Elsevier, vol. 96(C), pages 166-175.
    4. Zhang, Bo & Ji, Changwei & Wang, Shuofeng & Liu, Xiaolong, 2014. "Combustion and emissions characteristics of a spark-ignition engine fueled with hydrogen–methanol blends under lean and various loads conditions," Energy, Elsevier, vol. 74(C), pages 829-835.
    5. Tornatore, Cinzia & Bozza, Fabio & De Bellis, Vincenzo & Teodosio, Luigi & Valentino, Gerardo & Marchitto, Luca, 2019. "Experimental and numerical study on the influence of cooled EGR on knock tendency, performance and emissions of a downsized spark-ignition engine," Energy, Elsevier, vol. 172(C), pages 968-976.
    6. Zhao, Zhenfeng & Cui, Huasheng, 2022. "Numerical investigation on combustion processes of an aircraft piston engine fueled with aviation kerosene and gasoline," Energy, Elsevier, vol. 239(PD).
    7. Zhen, Xudong & Wang, Yang, 2013. "Study of ignition in a high compression ratio SI (spark ignition) methanol engine using LES (large eddy simulation) with detailed chemical kinetics," Energy, Elsevier, vol. 59(C), pages 549-558.
    8. Zhen, Xudong & Liu, Daming & Wang, Yang, 2017. "The knock study of methanol fuel based on multi-dimensional simulation analysis," Energy, Elsevier, vol. 122(C), pages 552-559.
    9. Aqian Li & Zhaolei Zheng, 2020. "Effect of Spark Ignition Timing and Water Injection Temperature on the Knock Combustion of a GDI Engine," Energies, MDPI, vol. 13(18), pages 1-24, September.
    10. Xu, Han & Yao, Anren & Yao, Chunde & Gao, Jian, 2017. "Investigation of energy transformation and damage effect under severe knock of engines," Applied Energy, Elsevier, vol. 203(C), pages 506-521.
    11. Zou, Run & Li, Yuan & Liu, Jinxiang & Wang, Nana & Zeng, Qinghan & Li, Jiong, 2023. "Numerical study on the effects of spark strategies on knocking combustion in a downsized gasoline rotary engine," Energy, Elsevier, vol. 263(PD).
    12. Zhen, Xudong & Wang, Yang, 2015. "An overview of methanol as an internal combustion engine fuel," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 477-493.
    13. Liu, Hui & Wang, Zhi & Wang, Jianxin, 2014. "Methanol-gasoline DFSI (dual-fuel spark ignition) combustion with dual-injection for engine knock suppression," Energy, Elsevier, vol. 73(C), pages 686-693.
    14. Zhen, Xudong & Wang, Yang, 2015. "Numerical analysis on original emissions for a spark ignition methanol engine based on detailed chemical kinetics," Renewable Energy, Elsevier, vol. 81(C), pages 43-51.
    15. Gong, Changming & Peng, Legao & Liu, Fenghua, 2017. "Modeling of the overall equivalence ratio effects on combustion process and unregulated emissions of an SIDI methanol engine," Energy, Elsevier, vol. 125(C), pages 118-126.
    16. Zhou, D.Z. & Yang, W.M. & An, H. & Li, J., 2015. "Application of CFD-chemical kinetics approach in detecting RCCI engine knocking fuelled with biodiesel/methanol," Applied Energy, Elsevier, vol. 145(C), pages 255-264.
    17. Gong, Changming & Liu, Zilong & Su, Hang & Chen, Yulin & Li, Junbo & Liu, Fenghua, 2019. "Effect of injection strategy on cold start firing, combustion and emissions of a LPG/methanol dual-fuel spark-ignition engine," Energy, Elsevier, vol. 178(C), pages 126-133.
    18. Xu, Han & Yao, Anren & Yao, Chunde & Gao, Jian, 2017. "Proper orthogonal decomposition for energy convergence of shock waves under severe knock," Energy, Elsevier, vol. 128(C), pages 813-829.

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