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Volume 39 Issue 3
Mar 2025
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Chinese Journal of High Pressure Physics  > 2025  >  39(3): 035301.
LI Run, CHENG Yangfan, ZHANG Beibei, LI Shizhou, LI Meng. Effect of Injection Pressure on Gasoline Deflagration Characteristics in Internal Combustion Engine[J]. Chinese Journal of High Pressure Physics, 2025, 39(3): 035301. doi: 10.11858/gywlxb.20240857
Citation: LI Run, CHENG Yangfan, ZHANG Beibei, LI Shizhou, LI Meng. Effect of Injection Pressure on Gasoline Deflagration Characteristics in Internal Combustion Engine[J]. Chinese Journal of High Pressure Physics, 2025, 39(3): 035301. doi: 10.11858/gywlxb.20240857
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Effect of Injection Pressure on Gasoline Deflagration Characteristics in Internal Combustion Engine

doi: 10.11858/gywlxb.20240857
  • 1.

    School of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China

  • 2.

    School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China

  • Received Date: 17 Jul 2024
  • Rev Recd Date: 11 Aug 2024
  • Accepted Date: 18 Oct 2024
    • Available Online: 09 Dec 2024
  • Issue Publish Date: 05 Mar 2025
    Abstract
  • In order to explore the influence of injection pressure on the deflagration characteristics of gasoline in the confined space, a 20 L spherical explosion test device was used to examine the changes of characteristic parameters, i.e., the transient flame propagation and temperature of gasoline mist deflagration under different injection pressures. The results showed that the optimum spraying time was 100 ms, and the maximum explosion pressure and maximum explosion pressure rise rate increased linearly with the increase of injection pressure, while explosion duration decreased linearly. The change of injection pressure had a more significant effect on explosion duration, and the combustion efficiency of gasoline increased significantly with the increase of injection pressure. Based on the colorimetric temperature measurement method, the flame temperature field was reconstructed. It was found that the maximum average temperature had a linear relationship with injection pressure, and the maximum average temperature increased with injection pressure. The influence of injection pressure on the deflagration characteristics of gasoline mist was analyzed through the changes of mist morphology and flame temperature during flame propagation. The outcome of this research can provide theoretical reference for the design of turbocharged direct injection internal combustion engine and the improvement of combustion efficiency and economy of gasoline internal combustion engine.

     

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