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作者:

Shi, Cheng (Shi, Cheng.) | Ji, Changwei (Ji, Changwei.) (学者:纪常伟) | Ge, Yunshan (Ge, Yunshan.) | Wang, Shuofeng (Wang, Shuofeng.) | Bao, Jianhui (Bao, Jianhui.) | Yang, Jinxin (Yang, Jinxin.)

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EI Scopus SCIE

摘要:

For the hydrogen-enriched spark-ignited Wankel engine, the optimization of ignition strategy is conducive to improve combustion performance and specifically effective to lessen the unburned region due to the elongated rotor chamber. In this paper, the role of the number of the ignition source, twin-spark plug location, asynchronous ignition, and energy allocation in improving lean combustion was investigated through the three-dimensional computational fluid dynamics model coupling with kinetic mechanisms. The model was validated by experiment, and good agreements between measured and predicted combustion pressure and the heat release rate was obtained. Results showed that the improvements of engine combustion were limited by single-spark ignition strategies, and the twin-spark ignition configuration was capable of enhancing combustion efficiency drastically. The arrangement of the twin-spark plug determined the space for flame development, and it was favorable for the trailing plug to stand a greater offset from the minor axis of the engine. An earlier leading-spark ignition enabled flame propagation faster and occurred quenching rapidly, which contributed to higher pressure-output and better heat-release. The higher energy of leading-spark ignition made the mixture consumption faster, combustion pressure higher, and combustion duration shorter. The optimum strategy on combustion was expressed as follows: the location of trailing-spark plug is offset from the minor axis by 20.7 mm; the spark timing and discharge energy of leading-spark plug is 325 degrees EA and 0.03 J, respectively; and those of trailing-spark plug is 335 degrees EA and 0.01 J. It was recommended that the leading-spark ignition was set earlier and stronger for practical operations.

关键词:

Twin-spark ignition Discharge energy Wankel engine Lean-burn Ignition amelioration Hydrogen-enriched

作者机构:

  • [ 1 ] [Shi, Cheng]Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
  • [ 2 ] [Ge, Yunshan]Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
  • [ 3 ] [Ji, Changwei]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Lab New Energy Vehicles, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Shuofeng]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Lab New Energy Vehicles, Beijing 100124, Peoples R China
  • [ 5 ] [Yang, Jinxin]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Lab New Energy Vehicles, Beijing 100124, Peoples R China
  • [ 6 ] [Ji, Changwei]Beijing Univ Technol, Key Lab Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 7 ] [Wang, Shuofeng]Beijing Univ Technol, Key Lab Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 8 ] [Yang, Jinxin]Beijing Univ Technol, Key Lab Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 9 ] [Bao, Jianhui]Dalian Univ Technol, Sch Microelect, Dalian 116024, Peoples R China

通讯作者信息:

  • 纪常伟

    [Ji, Changwei]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Lab New Energy Vehicles, Beijing 100124, Peoples R China;;[Ji, Changwei]Beijing Univ Technol, Key Lab Reg Air Pollut Control, Beijing 100124, Peoples R China

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来源 :

APPLIED ENERGY

ISSN: 0306-2619

年份: 2019

卷: 255

1 1 . 2 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:136

JCR分区:1

被引次数:

WoS核心集被引频次: 59

SCOPUS被引频次: 65

ESI高被引论文在榜: 0 展开所有

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