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Microscopic level study on the spray impingement process and characteristics

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  • Wang, Ziman
  • Guo, Hengjie
  • Wang, Chongming
  • Xu, Hongming
  • Li, Yanfei

Abstract

Spray impingement adversely affects fuel mixture preparation, combustion performance and emissions and more studies are required to understand this process. The isooctane spray impingement process and characteristics were investigated by ultrahigh speed imaging technique with the employment of highly spatially resolved long distance microscope. The effects of impact surface temperature were also studied. It was found that during the initial stage and steady stage of spray impingement, a large proportion of droplets splashed due to high velocity. The droplet size after impingement generally reduced because of the strong collision. For the end stage of impingement, droplets tended to stick on the impact surface and float on the fuel film due to the low droplet velocity and the existence of built liquid fuel film. It was also found that hot impact surface could only improve the impingement and reduced the film building-up rate in the initial stage. The steady stage and end stage of spray impingement were less affected by the variation in impact surface temperature.

Suggested Citation

  • Wang, Ziman & Guo, Hengjie & Wang, Chongming & Xu, Hongming & Li, Yanfei, 2017. "Microscopic level study on the spray impingement process and characteristics," Applied Energy, Elsevier, vol. 197(C), pages 114-123.
    • Handle: RePEc:eee:appene:v:197:y:2017:i:c:p:114-123
    DOI: 10.1016/j.apenergy.2017.04.014
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    References listed on IDEAS

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    1. Wang, Ziman & Jiang, Changzhao & Xu, Hongming & Badawy, Tawfik & Wang, Bo & Jiang, Yizhou, 2017. "The influence of flash boiling conditions on spray characteristics with closely coupled split injection strategy," Applied Energy, Elsevier, vol. 187(C), pages 523-533.
    2. Wang, Ziman & Ding, Haichun & Ma, Xiao & Xu, Hongming & Wyszynski, Miroslaw L., 2016. "Ultra-high speed imaging study of the diesel spray close to the injector tip at the initial opening stage with split injection," Applied Energy, Elsevier, vol. 163(C), pages 105-117.
    3. Wang, Ziman & Ding, Haichun & Ma, Xiao & Xu, Hongming & Wyszynski, Miroslaw L., 2016. "Ultra-high speed imaging study of the diesel spray close to the injector tip at the initial opening stage with single injection," Applied Energy, Elsevier, vol. 165(C), pages 335-344.
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    Cited by:

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    6. Shu, Jun & Fu, Jianqin & Liu, Jingping & Ma, Yinjie & Wang, Shuqian & Deng, Banglin & Zeng, Dongjian, 2019. "Effects of injector spray angle on combustion and emissions characteristics of a natural gas (NG)-diesel dual fuel engine based on CFD coupled with reduced chemical kinetic model," Applied Energy, Elsevier, vol. 233, pages 182-195.

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