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Effect of shock waves on the evolution of high-pressure fuel jets

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  • Huang, Weidi
  • Wu, Zhijun
  • Gao, Ya
  • Zhang, Lin

Abstract

In the modern diesel engine, with increasingly higher injection pressures, shock waves will appear with high velocity fuel jets. To better understand the effect of shock waves on the atomization of fuel sprays, diesel fuel injected at a pressure of 60 to 120MPa was studied using a schlieren imaging visualisation system. The initiation and boundary conditions of the shock wave initiated by fuel jets were examined. A clear difference of spray penetration between the shock-wave state and the non-shock-wave state was recorded in a nitrogen (N2) and sulphur hexafluoride (SF6) gas atmosphere. By eliminating the other potential explanations, such as pressure drop differences and the enhancement of gas density, it is shown that the shock wave itself had a predominant effect on the evolution of high-pressure fuel jets. Additionally, a computational model considering the Mach number was developed to predict the spray penetration. The model was found to have excellent agreement with the presented experimental results.

Suggested Citation

  • Huang, Weidi & Wu, Zhijun & Gao, Ya & Zhang, Lin, 2015. "Effect of shock waves on the evolution of high-pressure fuel jets," Applied Energy, Elsevier, vol. 159(C), pages 442-448.
    • Handle: RePEc:eee:appene:v:159:y:2015:i:c:p:442-448
    DOI: 10.1016/j.apenergy.2015.08.053
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    References listed on IDEAS

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    2. Pham, Quangkhai & Chang, Mengzhao & Kalwar, Ankur & Agarwal, Avinash Kumar & Park, Sungwook & Choi, Byungchul & Park, Suhan, 2023. "Macroscopic spray characteristics and internal structure studies of natural gas injection," Energy, Elsevier, vol. 263(PE).
    3. Weidi Huang & Huifeng Gong & Raditya Hendra Pratama & Seoksu Moon & Keiji Takagi & Zhili Chen, 2020. "Potential for Shock-Wave Generation at Diesel Engine Conditions and Its Influence on Spray Characteristics," Energies, MDPI, vol. 13(23), pages 1-19, December.

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