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应用考虑湍流-化学反应相互作用的代数二阶矩-概率密度函数(PDF)湍流燃烧模型,对分级进风旋流燃烧室内两组工况下的甲烷湍流燃烧进行了数值模拟,得到的二氧化碳浓度和气体轴向脉动速度均方根值分布与实验数据相符合,得到的气体轴向和切向速度、轴向-切向脉动速度关联量、温度和氧气浓度分布与实验数据基本相符合。研究结果表明,选取适当的二次风率可以起到优化燃烧过程的作用。
The algebraic second order moment-probability density function (PDF) turbulent combustion model considering the turbulence-chemical reaction interaction was used to simulate the methane turbulent combustion in two groups of operating conditions in the classified inlet cyclone combustion chamber. The obtained carbon dioxide The distribution of root mean square value of gas concentration and axial velocity agrees well with experimental data. The obtained gas axial and tangential velocity, axial-tangential velocity correlation, temperature and oxygen concentration are in good agreement with the experimental data. The results show that choosing the appropriate secondary air rate can play an important role in optimizing the combustion process.