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A comparative analysis of internal flow and spray characteristics in triangular orifices with diesel and biodiesel

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  • Yu, Shenghao
  • Yin, Bifeng
  • Chen, Chen
  • Jia, Hekun
  • Wang, Weifeng

Abstract

This paper presents an inquiry into the internal flow and spray behavior of diesel and biodiesel in a triangular orifice, using experimental and numerical methods. The inner flow was analyzed through the implementation of Large Eddy Simulation model. Furthermore, two high-speed cameras were utilized to capture spray images of the major and minor axes of the triangle-shaped nozzle simultaneously. The investigation revealed that, in comparison to diesel, biodiesel exhibited a higher discharge coefficient. Additionally, the vorticity magnitudes and turbulence vortex structures for biodiesel were consistently lower than those for diesel. The use of biodiesel can hinder the occurrence of cavitation. Moreover, it was observed that the triangular spray cone angle displayed axis-switching phenomena for both fuels. The axis-switching phenomenon is suppressed by using biodiesel. The research also discovered that the triangular biodiesel spray has a longer spray tip penetration and a smaller angle in all view planes. This could be attributed to the higher viscosity and surface tension of biodiesel, as well as the inhibition of the spray axis-switching during the injection, leading to an increase in the spray tip penetration and a decrease in the spray cone angle for biodiesel.

Suggested Citation

  • Yu, Shenghao & Yin, Bifeng & Chen, Chen & Jia, Hekun & Wang, Weifeng, 2023. "A comparative analysis of internal flow and spray characteristics in triangular orifices with diesel and biodiesel," Energy, Elsevier, vol. 285(C).
    • Handle: RePEc:eee:energy:v:285:y:2023:i:c:s0360544223027846
    DOI: 10.1016/j.energy.2023.129390
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    References listed on IDEAS

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