二维湍流扩散火焰的计算机模拟

COMPUTER SIMULATION OF 2-D TURBULENT DIFFUSIVE FLAMES

在二维直角坐标系下,开发了包括湍流流动的K—ε双方程模型、燃烧反应的混合分数f和湍流燃烧浓度波动g方程的湍流燃烧扩散火焰的K—ε—g数学模型。用该模型模拟计算了给定条件的燃烧过程。在不考虑辐射作用条件下,给出了燃烧过程气体的速度场、温度场和浓度场的分布,并且得到了燃烧火焰的形状。

In the 2-D rectangular coordinate system, a K-ε-g mathematical model of turbu- lent diffusive combustion was developed, which contaied K-ε two equation for turbulent flow, mixture fraction f for combustion reaction and concentration fluctuation g for turbulent combustion. Using the model, combustion processes had been calculated for given condi- tions. Without considering the radiative heat transfer, the gas velecity, temperature and concentration fields were obtained in combustion processes. In the meantime, the shape of the turbulent flame were worked out.