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Development of a reduced n-heptane-n-butylbenzene-polycyclic aromatic hydrocarbon (PAH) mechanism for engine combustion simulation and soot prediction

Author

Listed:
  • Huang, Haozhong
  • Zhu, Jizhen
  • Lv, Delin
  • Wei, Yaopeng
  • Zhu, Zhaojun
  • Yu, Binbin
  • Chen, Yingjie

Abstract

A reduced n-heptane-n-butylbenzene-PAH mechanism consisting of 111 species and 542 reactions was developed for diesel engine combustion and soot modeling. The reduced mechanism was formulated based on a detailed n-butylbenzene (BBZ) mechanism and a published reduced n-heptane-PAH mechanism. The reduced BBZ sub-mechanism was constructed using the directed relation graph with error propagation, sensitivity analysis, reaction pathway analysis and rate of production analysis methods. An evaluation system of the most sensitive reactions was proposed and sensitivity coefficient maps of ignition delay were depicted for the optimization of the proposed mechanism. The present mechanism was extensively validated with experimental results of ignition delay in shock tubes and rapid compression machines, species concentration in premixed flames and jet stirred reactors, laminar flame speed, and with new direct injection compression ignition engine combustion and emission data. The results of prediction are in good agreement with experiments and suggest that the proposed mechanism can be applied for combustion and soot predictions in engines. The soot particle size distribution of BRF30 (30%BBZ+70%n-heptane in volume) is closer to D100 (real diesel) than TRF20 (20%toluene+80%n-heptane in volume). It is indicated that BBZ may be more appropriate as the representative of aromatic compounds than toluene in diesel surrogate fuels.

Suggested Citation

  • Huang, Haozhong & Zhu, Jizhen & Lv, Delin & Wei, Yaopeng & Zhu, Zhaojun & Yu, Binbin & Chen, Yingjie, 2018. "Development of a reduced n-heptane-n-butylbenzene-polycyclic aromatic hydrocarbon (PAH) mechanism for engine combustion simulation and soot prediction," Energy, Elsevier, vol. 165(PB), pages 90-105.
    • Handle: RePEc:eee:energy:v:165:y:2018:i:pb:p:90-105
    DOI: 10.1016/j.energy.2018.09.162
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    References listed on IDEAS

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    1. Lu, Xingcai & Qian, Yong & Yang, Zheng & Han, Dong & Ji, Jibin & Zhou, Xiaoxin & Huang, Zhen, 2014. "Experimental study on compound HCCI (homogenous charge compression ignition) combustion fueled with gasoline and diesel blends," Energy, Elsevier, vol. 64(C), pages 707-718.
    2. Huang, Haozhong & Wang, Qingxin & Shi, Cheng & Liu, Qingsheng & Zhou, Chengzhong, 2016. "Comparative study of effects of pilot injection and fuel properties on low temperature combustion in diesel engine under a medium EGR rate," Applied Energy, Elsevier, vol. 179(C), pages 1194-1208.
    3. Huang, Haozhong & Zhou, Chengzhong & Liu, Qingsheng & Wang, Qingxin & Wang, Xueqiang, 2016. "An experimental study on the combustion and emission characteristics of a diesel engine under low temperature combustion of diesel/gasoline/n-butanol blends," Applied Energy, Elsevier, vol. 170(C), pages 219-231.
    4. Jia, Ming & Li, Yaopeng & Xie, Maozhao & Wang, Tianyou, 2013. "Numerical evaluation of the potential of late intake valve closing strategy for diesel PCCI (premixed charge compression ignition) engine in a wide speed and load range," Energy, Elsevier, vol. 51(C), pages 203-215.
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    Cited by:

    1. Banglin Deng & Weijiao Yu & Lili Zhou & Chengqi Sun, 2023. "A Comparative Investigation of the Emissions of a Heavy-Duty Diesel Engine under World Harmonized Transient Cycle and Road Spectrum Cycle," Energies, MDPI, vol. 17(1), pages 1-18, December.
    2. Huang, Haozhong & Lv, Delin & Chen, Yingjie & Zhu, Jizhen & Zhu, Zhaojun & Pan, Mingzhang & Chen, Yajuan & Teng, Wenwen, 2019. "Development and validation of a reduced multi-component mechanism for diesel engine application," Applied Energy, Elsevier, vol. 254(C).

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