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<p>This study investigates the effects of adjusting valve opening as an external excitation method on the swirling atomization flow field of biodiesel. Spray experiments were conducted under varying pressures and valve openings, controlled via a programmable logic controller system. Critical atomization characteristics were captured using a high-speed camera, while particle size distribution was analyzed with a laser particle size analyzer. Data analysis was conducted using MATLAB. The results indicate that external excitation notably increases the spray cone angle from 63.5° to 66.5° and substantially reduces the breakup length from 22 mm to 12 mm. Additionally, droplet size was highly responsive to external excitation, with the Sauter mean diameter decreasing from 98.71 μm to 81.67 μm. These findings demonstrate that external excitation can effectively optimize atomization performance, with proper control of excitation conditions significantly improving atomization efficiency.</p>

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Flow Field Characteristics and Flow Response in Biodiesel Swirl Atomization Under External Excitation

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • Yicheng Gao,
  • Shuang Wang,
  • Fashe Li,
  • Xin Ma

摘要

This study investigates the effects of adjusting valve opening as an external excitation method on the swirling atomization flow field of biodiesel. Spray experiments were conducted under varying pressures and valve openings, controlled via a programmable logic controller system. Critical atomization characteristics were captured using a high-speed camera, while particle size distribution was analyzed with a laser particle size analyzer. Data analysis was conducted using MATLAB. The results indicate that external excitation notably increases the spray cone angle from 63.5° to 66.5° and substantially reduces the breakup length from 22 mm to 12 mm. Additionally, droplet size was highly responsive to external excitation, with the Sauter mean diameter decreasing from 98.71 μm to 81.67 μm. These findings demonstrate that external excitation can effectively optimize atomization performance, with proper control of excitation conditions significantly improving atomization efficiency.