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<p>In order to meet the emission reduction targets set for the shipping industry, this study investigates the potential application of methanol as a fuel in marine boilers. Utilizing the coupled VOF-DPM method in combination with the AMR adaptive mesh refinement technique, numerical simulations were conducted to analyze the atomization process in the nozzle of a methanol-fueled boiler. The study examines the influence of various loading conditions and nozzle geometries on the atomization characteristics of methanol fuel, as well as the Sauter Mean Diameter (SMD) values. Furthermore, the dynamic evolution mechanisms of primary and secondary fragmentation of the methanol jet, driven by gas-liquid interfacial fragmentation, were explored.Results indicate that under high load conditions, the combined effects of inertial force and aerodynamic influence dominate the atomization process. In contrast, under medium load conditions, a liquid ring structure forms due to liquid reflux. Atomization performance is found to be optimal under low load conditions. The nozzle diameter significantly affects the air inlet mass flow rate, with a 20%-50% increase in SMD observed in small diameter nozzles under high and medium load conditions, resulting from a reduction in air mass flow rate. In low load conditions, however, the effect of nozzle diameter on the SMD is less pronounced. This study provides a comprehensive understanding of the methanol atomization mechanism and the multi-factor coupling effects, offering valuable theoretical insights for optimizing nozzle design, enhancing fuel utilization efficiency, and reducing carbon emissions in marine boilers.</p>

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Simulation of load-associated atomization performance in marine methanol boiler nozzles based on the VOF-DPM method

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Lei Li,
  • Huiyu Sun,
  • Feixiang Chang,
  • Qiang He,
  • Aoshuang Ding,
  • Lin Chen,
  • Jianlong Bu

摘要

In order to meet the emission reduction targets set for the shipping industry, this study investigates the potential application of methanol as a fuel in marine boilers. Utilizing the coupled VOF-DPM method in combination with the AMR adaptive mesh refinement technique, numerical simulations were conducted to analyze the atomization process in the nozzle of a methanol-fueled boiler. The study examines the influence of various loading conditions and nozzle geometries on the atomization characteristics of methanol fuel, as well as the Sauter Mean Diameter (SMD) values. Furthermore, the dynamic evolution mechanisms of primary and secondary fragmentation of the methanol jet, driven by gas-liquid interfacial fragmentation, were explored.Results indicate that under high load conditions, the combined effects of inertial force and aerodynamic influence dominate the atomization process. In contrast, under medium load conditions, a liquid ring structure forms due to liquid reflux. Atomization performance is found to be optimal under low load conditions. The nozzle diameter significantly affects the air inlet mass flow rate, with a 20%-50% increase in SMD observed in small diameter nozzles under high and medium load conditions, resulting from a reduction in air mass flow rate. In low load conditions, however, the effect of nozzle diameter on the SMD is less pronounced. This study provides a comprehensive understanding of the methanol atomization mechanism and the multi-factor coupling effects, offering valuable theoretical insights for optimizing nozzle design, enhancing fuel utilization efficiency, and reducing carbon emissions in marine boilers.