摘要
对常见的双δ- PDF模型、截尾高斯 PDF模型和β函数 PDF模型比较分析的基础上 ,提出了一种新的用于湍流燃烧的多点 δ- PDF模型。研究和确定了多点 δ- PDF模型的概率分布形状和概率点的数目 ,并用不同特征的算例对多点 δ- PDF模型进行了验证。与截尾高斯 PDF模型的计算结果和实验结果比较 ,该模型的计算结果合理 ,同时它又有待定参数易于确定、计算量较小的特点。
Based on the analysis of the widely used top hat PDF model,clipped Gaussian PDF model and β PDF model,a multi δ PDF model of turbulent combustion is proposed.The general shape and the number of peaks (where the probability isnt equal to zero) of the multi δ PDF are studied and determined by comparison among different cases.Comparison with the clipped Gaussian PDF model,β PDF model and top hat PDF model indicates that the multi δ PDF model has almost the same simplicity of the top hat PDF model and the reasonability of the clipped Gaussian PDF model.This model is tested by experimental results of turbulent methane diffusion flames,and its prediction results are in good agreement with the experimental results..
出处
《燃烧科学与技术》
CAS
CSCD
2000年第1期57-62,共6页
Journal of Combustion Science and Technology
