燃烧和反应

Experimental Study on the Penetration of Diesel and Biodiesel Spray Liquid Emerging from an Equilateral Triangular Orifice under Evaporative Conditions

  • YIN Bifeng ,
  • YE Ze ,
  • JIA Hekun ,
  • YU Shenghao ,
  • DENG Weixin
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  • 1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
    2. Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute of CARD, Mianyang 621000, China

网络出版日期: 2023-12-01

基金资助

This work was supported by the Graduate Student Innovation Fund Project of Jiangsu Province (KYCX17_1778), the Science and Technology on Scramjet Laboratory Project of China (STS/MY-KFKT-2017001), the Natural Science Foundation of Jiangsu Province of China (BK20150520), Jiangsu Province Post-doctoral Fund (2018K031B), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Experimental Study on the Penetration of Diesel and Biodiesel Spray Liquid Emerging from an Equilateral Triangular Orifice under Evaporative Conditions

  • YIN Bifeng ,
  • YE Ze ,
  • JIA Hekun ,
  • YU Shenghao ,
  • DENG Weixin
Expand
  • 1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
    2. Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute of CARD, Mianyang 621000, China

Online published: 2023-12-01

Supported by

This work was supported by the Graduate Student Innovation Fund Project of Jiangsu Province (KYCX17_1778), the Science and Technology on Scramjet Laboratory Project of China (STS/MY-KFKT-2017001), the Natural Science Foundation of Jiangsu Province of China (BK20150520), Jiangsu Province Post-doctoral Fund (2018K031B), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

本文利用米氏散射法探究了在不同喷射条件下等边三角孔和圆孔喷射出柴油和生物柴油的液相特性。结果表明:在相同喷射条件下,生物柴油的液相长度比柴油更长;提高环境背压会促进空气与燃油之间的相互作用,从而加速液相破碎过程。而随着环境温度的升高,生物柴油的液相穿透距离减少量要小于柴油,这是由于生物柴油较高的表面张力和粘度阻碍空气与液相的相互扰动并抑制了液相破碎过程。试验结果还发现柴油的液相长度普遍小于生物柴油,这也表明柴油喷雾具有更好的雾化特性。最后还发现等边三角喷孔的液相长度比圆孔短,且等边三角孔平均液相锥角小于圆孔,说明了等边三角喷孔具有加快油气混合过程的潜力。

本文引用格式

YIN Bifeng , YE Ze , JIA Hekun , YU Shenghao , DENG Weixin . Experimental Study on the Penetration of Diesel and Biodiesel Spray Liquid Emerging from an Equilateral Triangular Orifice under Evaporative Conditions[J]. 热科学学报, 2022 , 31(5) : 1565 -1574 . DOI: 10.1007/s11630-022-1529-5

Abstract

This paper reports the results of an experimental study on the liquid phase characteristics of the biodiesel and diesel discharged from an equilateral triangular orifice and a circular orifice under different injection conditions by Mie-scattering imaging. The results revealed that the biodiesel liquid penetration length was longer than that of diesel under the same injection conditions. In addition, the increase of the chamber pressure was expected to enhance the interaction between air and fuel, resulting in the acceleration of the liquid phase breakup process. Moreover, with increasing chamber temperature, the liquid penetration of biodiesel was reduced less than that of diesel. This was due to the high surface tension and viscosity of biodiesel which inhibited the chamber air entrainment and suppressed the liquid breakup process. Accordingly, the higher probability of shorter diesel liquid penetration length indicated better air-fuel mixing than that of biodiesel. Besides, the triangular orifice liquid length was shorter than that of the circular orifice. And the stabilized liquid cone angle from the circular orifice was larger than that from the triangular orifice, indicating that using an equilateral triangular orifice has the potential to improve the air-fuel mixing process.

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