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兵工学报 ›› 2020, Vol. 41 ›› Issue (3): 426-433.doi: 10.3969/j.issn.1000-1093.2020.03.002

• 论文 • 上一篇    下一篇

不同燃油对某重型柴油机燃烧稳定性影响分析

顾程1, 乔新勇1, 韩立军2   

  1. (1.陆军装甲兵学院 车辆工程系, 北京 100072; 2.武警工程大学乌鲁木齐校区, 新疆 乌鲁木齐 830049)
  • 收稿日期:2019-05-14 修回日期:2019-05-14 上线日期:2020-05-11
  • 通讯作者: 乔新勇(1970—),男,副教授,博士生导师 E-mail:qxyaafe@sina.com
  • 作者简介:顾程(1992—),男,博士研究生。E-mail:gucheng92@126.com
  • 基金资助:
    国防“973”计划项目(6312520302)

Analysis about the Influences of Different Fuels on the Combustion Stability of a Heavy Duty Diesel Engine

GU Cheng1, QIAO Xinyong1, HAN Lijun2   

  1. (1.Vehicle Engineering Department, Army Academy of Armored Forces, Beijing 100072, China;2.Urumqi Campus of Engineering University of PAP, Urumqi 830049, Xinjiang, China)
  • Received:2019-05-14 Revised:2019-05-14 Online:2020-05-11

摘要: 为了揭示不同燃油对柴油机燃烧过程循环变动的影响规律,选用A、B、C 3种军用柴油作为燃料进行标定工况及最大扭矩工况下的台架试验。对缸内压力时间序列进行三维相空间重构,利用燃烧参数的循环波动率定量分析柴油机燃烧稳定性,并结合返回映射对平均指示压力进行研究。结果表明:柴油机缸内状态呈现一定的混沌特性,燃烧过程中缸内压力呈现出振荡的特点,燃用柴油A时燃烧阶段的迹线相对密集,燃用柴油B和柴油C时迹线逐渐发散;燃烧阶段压力波动率峰值与压力振荡区域相对应,最大扭矩工况下柴油A的前两峰值最低、滞燃期最短,平均指示压力循环变动最小;随着转速上升,燃用3种柴油的燃烧稳定性均有所提高。

关键词: 重型柴油机, 燃油, 燃烧稳定性, 循环波动

Abstract: In order to reveal the influences of different fuels on the cyclical variation of diesel combustion process, three military diesel fuels A, B, and C were selected as fuels for the bench test under the calibration conditions and the maximum torque conditions. The three-dimensional phase space of the in- cylinder pressure time series was reconstructed. The combustion stability of diesel engine was quantitatively analyzed by using the cyclic fluctuation rate of the combustion parameters, and the average indicated pressure was studied from the return mapping. The results show that the state of cylinder in diesel engine exhibits certain chaotic characteristics. During the combustion process, the pressure in the cylinder is oscillating. Compared with Fuel B and Fuel C, the traces of Fuel A in the combustion stage are relatively dense. The peak pressure fluctuation rate in the combustion stage corresponds to the pressure oscillation region. Under the maximum torque condition, the first two peak pressure fluctuation rates of Fuel A are the lowest, the combustion delay period is the shortest, and the average indicated pressure cycle is the smallest. The combustion stabilities of three diesel fuels are improved with the increase in the rotational speed. Key

Key words: heavydutydieselengine, fuel, combustionstability, cyclicfluctuation

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