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

Ming HAO; Xingguo WANG; Teng LI

doi:10.7512/j.issn.1001-2303.2022.01.14

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Numerical Simulation of Flame Combustion at Cutting Nozzle External Flow Field Based on FLUENT
Vol. 52, Issue 1, Pages: 109-114(2022)
DOI： 10.7512/j.issn.1001-2303.2022.01.14

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郝明，王兴国，李腾.基于FLUENT的割嘴外部流场火焰燃烧的数值模拟［J］.电焊机，2022，52（01）：109-114.

HAO Ming, WANG Xingguo, LI Teng.Numerical simulation of flame combustion at cutting nozzle external flow field[J].Electric Welding Machine, 2022, 52(01): 109-114.
郝明，王兴国，李腾.基于FLUENT的割嘴外部流场火焰燃烧的数值模拟［J］.电焊机，2022，52（01）：109-114. DOI： 10.7512/j.issn.1001-2303.2022.01.14.

HAO Ming, WANG Xingguo, LI Teng.Numerical simulation of flame combustion at cutting nozzle external flow field[J].Electric Welding Machine, 2022, 52(01): 109-114. DOI： 10.7512/j.issn.1001-2303.2022.01.14.

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2 760 k，进而为提高火焰的燃烧效率提供了理论依据。

Abstract

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 2 760 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

Keywords

cutting nozzleflame combustionFLUENTED

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