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Effect of injection dynamic behavior on fuel spray penetration of common-rail injector

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Listed:
  • Lei, Yan
  • Liu, Jiaxing
  • Qiu, Tao
  • Mi, Jianchun
  • Liu, Xianwu
  • Zhao, Ning
  • Peng, Guangyu

Abstract

The spray tip penetration is an important parameter to evaluate the fuel injection quality. This study presents an experimental investigation on the high-pressure diesel injection process of a common-rail injector under condition of varying pressures, particularly on the effect of the dynamic injection behavior on the fuel spray penetration. The injector delivery process is tested on a common-rail test rig, with an optical test rig to examine the diesel spray based on a constant-volume bomb (CVB) system. This process includes two stages: i.e., the opening stage and the keeping stage, while the two-stage injection momentum causes crucial influence on the fuel spray. Correspondingly, the fuel spray penetration also has two stages. In Stage I (the dynamic stage), the spray penetration sharply increases. In Stage II (stable stage), the spray penetration stably increases. When the injection pressure rises, the spray tip penetration increases, and the two-stage turning-point time is shorter. Considering this two-stage characteristic, an equation is proposed to predicate the spray tip penetration: it is based on the dynamic injection pressure for the dynamic period but the constant pressure differential for the stable period. The predicated spray tip penetration has good agreement with the test data.

Suggested Citation

  • Lei, Yan & Liu, Jiaxing & Qiu, Tao & Mi, Jianchun & Liu, Xianwu & Zhao, Ning & Peng, Guangyu, 2019. "Effect of injection dynamic behavior on fuel spray penetration of common-rail injector," Energy, Elsevier, vol. 188(C).
    • Handle: RePEc:eee:energy:v:188:y:2019:i:c:s0360544219317554
    DOI: 10.1016/j.energy.2019.116060
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    References listed on IDEAS

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    1. Soid, S.N. & Zainal, Z.A., 2011. "Spray and combustion characterization for internal combustion engines using optical measuring techniques – A review," Energy, Elsevier, vol. 36(2), pages 724-741.
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    1. Ding, Hong-ming & Zhuo, Chang-fei & Deng, Han-yu & Li, Mao-quan & Chen, Xiong & Sun, Bo, 2023. "Experimental and numerical study on the development process and flow characteristics of powder fuel jet in the powder fuel scramjet," Energy, Elsevier, vol. 262(PA).
    2. Masataka Arai, 2022. "Interpretative Review of Diesel Spray Penetration Normalized by Length and Time of Breakup (Similarity Law of Diesel Spray and Its Application)," Energies, MDPI, vol. 15(13), pages 1-36, July.
    3. Yan Lei & Xiaojie Liang & Dingwu Zhou & Tao Qiu & Kaixin Wang & Yue Wu, 2022. "Effect of Particle Diameter on Primary Breakup of High-Pressure Diesel Spray Atomization: A Study Based on Numerical Simulations Using the Eulerian–Lagrangian Model," Energies, MDPI, vol. 16(1), pages 1-24, December.
    4. Yan Lei & Yue Wu & Dingwu Zhou & Kaixin Wang & Tao Qiu & Yuwan Deng & Dan Zhou, 2022. "Investigation on Primary Breakup of High-Pressure Diesel Spray Atomization by Method of Automatic Identifying Droplet Feature Based on Eulerian–Lagrangian Model," Energies, MDPI, vol. 15(3), pages 1-18, January.

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