河南科技大学学报（自然科学版）2025，Vol.46Issue(5)：1-9,9.DOI:10.15926/j.cnki.issn1672-6871.2025.05.001
基于CFD的工业炉甲醇燃烧器旋流火焰优化
Optimization of Swirling Flames of Methanol Burners in Industrial Furnaces Based on CFD
摘要
Abstract
In order to improve the combustion efficiency of methanol swirl burners and reduce NO emissions,the combustion state and NO emissions of methanol swirl burners were investigated through numerical simulation.The results were compared and optimized with experimental data.A laser particle size analyzer was used to examine the atomization effect and droplet size distribution of methanol spray.This provided the spray size parameters for the discrete phase model of methanol droplets in the numerical simulation.The results show that the simulated spray size closely matches the experimental data.The study focuses on analyzing the effects of different blade angles on velocity distribution,temperature distribution,and NO mass concentration in the combustion chamber.The results indicate that as the blade angle increases,axial velocity of the gas mixture is suppressed.Stable recirculation zones are formed in the combustion chamber at blade angles of α=40° andα=60°,significantly improving the mixing of methanol and air.Regarding temperature distribution,under small blade angles,high-temperature zones are concentrated but relatively low in temperature,with noticeable low-temperature regions at the bottom.Under large blade angles,high-temperature zones expand,temperature increases significantly,and bottom temperature uniformity improves.Combustion efficiency improves as blade angle increases,but the improvement weakens when the angle exceeds 40°.NO generation concentration in the combustion chamber and at the outlet rises with increasing blade angles.The swirl vane angle significantly affects velocity,temperature,NO distribution,and combustion efficiency in the combustion chamber.The optimal performance is achieved at α=40°.关键词
甲醇燃烧器/数值模拟/喷雾/旋流叶片角度/NOKey words
methanol burner/numerical simulation/spray/swirl blade angle/NO分类
机械工程引用本文复制引用
杜慧勇,任家毅,李可,李民,邹立,魏东硕..基于CFD的工业炉甲醇燃烧器旋流火焰优化[J].河南科技大学学报（自然科学版）,2025,46(5):1-9,9.基金项目
国家重点研发计划项目(2016YFD0700700) （2016YFD0700700）
