The outstanding advantages of methanol such as low pollutant emissions of nitrogen oxides (NOx) and carbon monoxide (CO) make it a promising clean-burning fuel. Despite, the latent heat of vaporization of methanol is 3.70 times that of gasoline, the low heating value of methanol is one of the most critical barriers to its effective utilization in industrial applications. Thus, the methanol burner needs to be effectively designed to determine the desired combustion characteristics and the optimal design of this type of clean burner. Hence, this study presents a computational fluid dynamic analysis on the combustion characteristics of a methanol swirling burner with two layers of swirling blades. A particular focus of this study is emphasized on the effects of different swirling blade angles (45°+45°, 60°+60°, and 45°+60°) and various equivalence ratios (0.5, 0.75, 1.0, 1.25, and 1.75) on the combustion characteristics and pollutants formation of the swirl burner. The velocity and temperature profiles, combustion characteristics, and concentrations of major combustion species are analyzed in detail. The results show that the blade angle arrangement of 45°+ 60° exhibits the best combustion characteristics in comparison with the other blade angle arrangements. It is also found that the BA₃ with an equivalent ratio in the range of 1.0–1.25 shows the best performance in the emissions of NOx and CO compared with other combinations of swirling blade arrangements and equivalence ratios. More specifically, the optimal equivalence ratio ranges from 1.0 to 1.25 at which the NOx and CO emissions are measured to be 27.0 and 11.0 mg/m³, respectively.

甲醇具有氮氧化物 (NOx) 和一氧化碳(CO)污染物排放低等突出优势，使其成为一种很有前景的清洁燃料。尽管甲醇的汽化潜热是汽油的 3.70 倍，但甲醇的低热值是其在工业应用中有效利用的最关键障碍之一。因此，需要对甲醇燃烧器进行有效设计，以确定所需的燃烧特性以及此类清洁燃烧器的优化设计。因此，本研究提出了计算流体动力学两层旋流叶片甲醇旋流燃烧器燃烧特性分析[J]. 本研究特别关注不同旋流叶片角度（45°+45°、60°+60° 和 45°+60°）和各种当量比（0.5、0.75、1.0、1.25 和1.75) 关于旋流燃烧器的燃烧特性和污染物的形成。详细分析了主要燃烧物质的速度和温度分布、燃烧特性和浓度。结果表明，与其他叶片角度布置相比，45°+60°的叶片角度布置表现出最佳的燃烧特性。还发现 BA ₃与其他旋流叶片布置和当量比的组合相比，当量比在 1.0-1.25 范围内时，在 NOx 和 CO 排放方面表现最佳。更具体地说，最佳当量比范围为 1.0 到 1.25，在该范围内，NOx 和 CO 排放量分别测量为 27.0 和 11.0 mg/m ³。