Scholarlink

<p>By 2050, the global population is projected to exceed 9.2 billion, leading to a substantial increase in energy demand, particularly in the transportation sector. Diesel engines are known for their superior performance; however, they remain significant contributors to exhaust emissions, posing serious environmental and public health challenges. These issues hinder progress toward the United Nations Sustainable Development Goals. Blending syngas with diesel fuel has been proposed as a strategy to reduce these emissions. While previous studies have examined various injection parameters and piston configurations in syngas-diesel dual-fuel engines, they typically focus on nozzle size and piston squish area separately. This study aimed to build upon prior research by examining the combined effects of piston shape and nozzle size on combustion performance and emissions using computational fluid dynamics simulations, which were validated against experimental data. The analysis included different piston squish areas (10, 20, and 30%) and nozzle sizes (0.2, 0.25, and 0.37&#xa0;mm), while maintaining constant injection mass and compression ratio. The results indicated that a 10% squish area piston combined with a 0.25&#xa0;mm nozzle hole achieved optimal in-cylinder charge motion, reduced spray wall impingement, improved thermal efficiency, and significantly lowered unburned syngas emissions. These findings offer new insights into optimizing dual-fuel engines for enhanced performance and reduced emissions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of Nozzle-Hole Size and Piston Bowl Shape on Combustion and Emission Characteristics of a Syngas-Diesel Dual-Fuel Engine

  • 期刊论文

  • 发表日期：

    2025年1月7日

查看全文
  • Abubaker A. M. Mohammedali,
  • Kiseong Kim,
  • Adil A. M. Omara

摘要

By 2050, the global population is projected to exceed 9.2 billion, leading to a substantial increase in energy demand, particularly in the transportation sector. Diesel engines are known for their superior performance; however, they remain significant contributors to exhaust emissions, posing serious environmental and public health challenges. These issues hinder progress toward the United Nations Sustainable Development Goals. Blending syngas with diesel fuel has been proposed as a strategy to reduce these emissions. While previous studies have examined various injection parameters and piston configurations in syngas-diesel dual-fuel engines, they typically focus on nozzle size and piston squish area separately. This study aimed to build upon prior research by examining the combined effects of piston shape and nozzle size on combustion performance and emissions using computational fluid dynamics simulations, which were validated against experimental data. The analysis included different piston squish areas (10, 20, and 30%) and nozzle sizes (0.2, 0.25, and 0.37 mm), while maintaining constant injection mass and compression ratio. The results indicated that a 10% squish area piston combined with a 0.25 mm nozzle hole achieved optimal in-cylinder charge motion, reduced spray wall impingement, improved thermal efficiency, and significantly lowered unburned syngas emissions. These findings offer new insights into optimizing dual-fuel engines for enhanced performance and reduced emissions.