中文摘要：

在二阶矩的范围内提出了联合的简化的PDF模型,在该模型中,假定联合的PDF满足反应物浓度和温度的三维高斯分布,因此化学反应速率可以很容易的通过积分获得。与其他模型相比,本模型可以方便的应用于湍流预混燃烧和扩散燃烧。为了对该模型进行检验,计算了甲烷的射流扩散燃烧。计算结果表明,相对于EBU,EBU-Arrhenius模型有了很大的改进,特别是轴线上的温度,同时计算结果与实验结果比较相符,表明该模型可以方便的考虑化学反应动力学和湍流扩散的影响。

英文摘要：

A joint presumed pdf model for turbulent combustion is present. In this model, the joint PDF of reactant concentrations and temperature is assumed in the form of three-dimension Gaussian distribution. The unknown parameters in this distribution are determined according to all correlation of reactant concentrations and temperature. Therefore, the mean reaction rate can be easily closed by integration of PDF for reactant concentrations and temperature. Compared with EBU and EBU-Arrhenius models, this model ca...