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The Effect of Elliptical Diesel Nozzles on Spray Liquid-Phase Penetration under Evaporative Conditions

Author

Listed:
  • Bifeng Yin

    (School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Bin Xu

    (School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Hekun Jia

    (School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Shenghao Yu

    (School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China)

Abstract

Elliptical diesel nozzles affect the fuel–air mixing process, and thus combustion and exhaust emissions. Experiments were conducted to study biodiesel spray liquid-phase behaviors for elliptical and circular nozzles through the Mie-scattering method under evaporative conditions. Based on the measurements, the results show that the elliptical nozzle spray liquid-phase penetration is smaller than the circular one under steady-state conditions. The deformation and the axis-switching behaviors of the elliptical jet are helpful in accelerating the breakup of the liquid core. Moreover, the injection pressure has little impact on the penetration of the liquid-phase spray for either geometrical orifice. Additionally, increasing the ambient temperature can reduce the penetration of liquid-phase spray, because an increase in temperature increases the rate of evaporation. The differences in steady liquid-phase penetration between circular and elliptical sprays decrease as the ambient temperature increases. Additionally, increasing the backpressure can decrease the liquid-phase penetration. The differences in steady liquid-phase penetration between circular and elliptical nozzles are reduced with the increase in backpressure, probably due to the axis-switching and deformation behaviors of the elliptical jet being restrained under high-backpressure conditions. Finally, the application of an elliptical orifice is beneficial for decreasing the spray liquid-phase penetration, and thus avoiding the fuel impingement in small engine combustion chambers. The lower liquid-phase penetration for elliptical spray indicated higher fuel and air mixture quality, which is helpful for reducing the diesel engine exhaust soot emissions.

Suggested Citation

  • Bifeng Yin & Bin Xu & Hekun Jia & Shenghao Yu, 2020. "The Effect of Elliptical Diesel Nozzles on Spray Liquid-Phase Penetration under Evaporative Conditions," Energies, MDPI, vol. 13(9), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:9:p:2234-:d:353631
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    References listed on IDEAS

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    1. Wang, Zhaowen & Shi, Shuguo & Huang, Sheng & Tang, Jie & Du, Tao & Cheng, Xiaobei & Huang, Ronghua & Chen, Jyh-Yuan, 2018. "Effects of water content on evaporation and combustion characteristics of water emulsified diesel spray," Applied Energy, Elsevier, vol. 226(C), pages 397-407.
    2. Payri, Raul & Gimeno, Jaime & Bardi, Michele & Plazas, Alejandro H., 2013. "Study liquid length penetration results obtained with a direct acting piezo electric injector," Applied Energy, Elsevier, vol. 106(C), pages 152-162.
    3. Shang, Weiwei & He, Zhixia & Wang, Qian & Cao, Jiawei & Li, Bei & Leng, Xianyin & Tamilselvan, P. & Li, Da, 2018. "Experimental and analytical study on capture spray liquid penetration and combustion characteristics simultaneously with Hydrogenated Catalytic Biodiesel/Diesel blended fuel," Applied Energy, Elsevier, vol. 226(C), pages 947-956.
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    Cited by:

    1. Yu, Shenghao & Yin, Bifeng & Bi, Qinsheng & Chen, Chen & Jia, Hekun, 2021. "Experimental and numerical investigation on inner flow and spray characteristics of elliptical GDI injectors with large aspect ratio," Energy, Elsevier, vol. 224(C).

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