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对湍流旋流燃烧进行数值模拟和预报的关键之一在于合理地描述湍流与化学反应之间的相互作用。该文应用描述湍流-化学反应相互作用的代数二阶矩-概率密度函数(PDF)模型,对旋流燃烧室内的湍流燃烧进行了数值模拟,给出了燃烧室内湍流平均反应率、温度脉动均方根值、燃料-氧气浓度脉动二阶矩、燃料浓度脉动二阶矩和氧气浓度脉动二阶矩的分布。结果表明:各浓度脉动二阶矩和温度脉动均方根值分布与湍流平均反应率分布之间有着较好的关联性。
One of the keys to the numerical simulation and prediction of turbulent swirling combustion is to reasonably describe the interaction between turbulence and chemical reactions. In this paper, an algebraic second-order moment-probability density function (PDF) model describing turbulence-chemical reaction interaction is used to simulate the turbulent combustion in a swirling chamber. The average turbulence response rate, temperature fluctuation Root mean square value, second moment of fuel-oxygen concentration pulsation, second moment of fuel concentration pulsation and second moment of oxygen pulsation. The results show that there is a good correlation between the rms distributions of second-order moments and temperature pulsations of each concentration and the average response rate of turbulence.