摘要
为探究一种新型旋流式气化炉冷态流场分布特性及内部结构对其流场的影响,应用计算流体力学(CFD)软件FLUENT对该气化炉进行三维数值模拟分析。采用RNGκ-ε湍流模型,通过多点测压实验,对模拟结果进行验证,并且采用不同的开孔率及旋流片角度组合分析气化炉内部结构对其流场的影响。结果表明:模拟和测压实验结果较为一致;旋流式气化炉内气流主要做螺旋上升运动;栅板开孔率大小主要影响气化炉内压降、轴向速度以及湍流强度;而旋流片角度则主要影响切向速度及湍流强度分布。新型旋流式气化炉内部栅板—旋流片结构可增加气化反应速率及反应停留时间,有助于气化反应的进行。
Three dimensional numerical simulation of cold flow field in a new type of swirl gasifier was carried out by using computational fluid dynamics （CFD） software FLUENT, in order to explore the influence of the cold flow field distribution characteristics and the internal structure on the flow field of a swirl gasifier. RNG κ-ε turbulence model was used in the simulation research, and the accuracy of the model was verified through muhi-point pressure test. The influence of the internal structure of the gasifier on the flow field was analyzed by using the different opening ratio and the angle of swirl plate. The results show that the simulation and experimental results are basically consistent, and the air flow in the swirl gasifier is mainly the spiral upward movement. The opening ratio of grate mainly influence pressure, axial velocity and turbulence intensity and the angle of swirl plate mainly influence tangential velocity and turbulence intensity distribution in the swirl gasifier. The gate-swirl plate structure in a new type of swirl gasifier can increase the gasification reaction rate and reaction time that contribute to the gasification reaction.
作者
黄世钊
张映
冼萍
向冰
吴林杰
HUANG Shizhao ZHANG Ying XIAN Ping XIANG Bing WU Linjie(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004, China Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China School of the Environment Engineering, Guangxi University, Nanning 530004, China Department of Electrical Application Technology, Guangxi Petrochemical Advanced Technical School, Nanning 530033, China)
出处
《轻工机械》
CAS
2017年第2期5-10,共6页
Light Industry Machinery
基金
广西科学研究与技术开发计划项目(桂科攻0992022-5)
