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Effect of air flow rate and temperature on the atomization characteristics of biodiesel in internal and external flow fields of the pressure swirl nozzle

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  • Ma, Xin
  • Wang, Shuang
  • Li, Fashe
  • Zhang, Huicong
  • Jiang, Shang
  • Sui, Meng

Abstract

In this study, the flow and spray of biodiesel in the swirl atomization nozzle were analyzed. The influence of primary air flow rate and temperature on the atomization characteristics in the internal and external flow fields of biodiesel was discussed through simulation and experiments. The velocity of biodiesel in the nozzle and mixing chamber were symmetrically distributed. With increasing primary air flow rate, the maximum speed area increased and the shape of the turbulent kinetic energy of biodiesel changed from columnar to funnel. When the primary air flow rate increased from 10 to 30 L/min, the Sauter mean diameter, (SMD, d32) decreased from 95 to 28 μm, and when it increased to 50 L/min, d32 changed slightly. With increasing fuel temperature, the spray velocity increased and the particle size gradually decreased, while the particle size of each interval remained almost unchanged over 45 °C. Therefore, the best primary air flow rate and temperature for the swirling atomization of biodiesel were 30 L/min and 45 °C. It was determined that the increase in air flow rate and temperature promoted the development of atomization flow field and the breaking of droplets in biodiesel, thus optimizing the swirling atomization of biodiesel.

Suggested Citation

  • Ma, Xin & Wang, Shuang & Li, Fashe & Zhang, Huicong & Jiang, Shang & Sui, Meng, 2022. "Effect of air flow rate and temperature on the atomization characteristics of biodiesel in internal and external flow fields of the pressure swirl nozzle," Energy, Elsevier, vol. 253(C).
    • Handle: RePEc:eee:energy:v:253:y:2022:i:c:s0360544222010155
    DOI: 10.1016/j.energy.2022.124112
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    References listed on IDEAS

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    1. Silva Herran, Diego & Tachiiri, Kaoru & Matsumoto, Ken'ichi, 2019. "Global energy system transformations in mitigation scenarios considering climate uncertainties," Applied Energy, Elsevier, vol. 243(C), pages 119-131.
    2. Khan, Mohammed Asad & Gadgil, Hrishikesh & Kumar, Sudarshan, 2019. "Influence of liquid properties on atomization characteristics of flow-blurring injector at ultra-low flow rates," Energy, Elsevier, vol. 171(C), pages 1-13.
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