基于FLUENT的割嘴外部流场火焰燃烧的数值模拟  

Numerical Simulation of Flame Combustion at Cutting Nozzle External Flow Field Based on FLUENT

作　　者：郝明 王兴国 李腾 HAO Ming;WANG Xingguo;LI Teng(School of Mechanical and Electrical Engineering,Qiqihaer University,Qiqihaer 161000,China)

机构地区：[1]齐齐哈尔大学机电工程学院,黑龙江齐齐哈尔161000

出　　处：《电焊机》2022年第1期109-114,共6页Electric Welding Machine

摘　　要：利用FLUENT软件对割嘴外部流场的喷雾燃烧过程进行了数值仿真模拟。湍流模型采用标准k-ε模型,燃烧模型采用涡耗散(ED)模型,燃油液滴通过离散相模型来描述,尝试利用ED模型探索割嘴外部流场火焰燃烧的可能性,通过模拟得到了合理的温度场、速度场和浓度场,以及火焰燃烧的各种细节。同时,通过对燃料与氧气不同混合比进行对比,发现60%燃料+40%氧气和55%燃料+45%氧气所能达到的最高温度几乎相同,约为2760 k,进而为提高火焰的燃烧效率提供了理论依据。In this paper,spray combustion process was simulated numerically at cutting nozzle external flow field by the FLUENT software.Turbulence model was standard model,combustion model was eddy dissipation model,fuel droplet was described by discrete phase model,this article attempts to use the ED model to explore the possibility of flame burning in the flow field outside the cutting nozzle,through simulation,temperature field,velocity field,concentration field and various details of flame combustion reasonable were obtained.At the same time,by comparing the different mixing ratios of fuel and oxygen,it is found that the maximum temperature that 60%fuel and 40%oxygen and 55%fuel and 45%oxygen can reach is almost the same,which is about 2760 k,and then provide theoretical basis for improve the flame combustion efficiency.

关 键 词：割嘴 火焰燃烧 FLUENT 涡耗散 

分 类 号：TG482.3[金属学及工艺—焊接]