摘要
用求解速度和化学热力学参数联合概率密度函数(pdf)输运方程的方法,计算湍流燃烧问题时,湍流输运和化学反应等过程可以精确计算,无须模拟。它还可以提供比统计矩模型方法更多的信息,因此是一个很有潜力的方法。本文给出了湍流燃烧概率密度函数的输运方程,扼要地介绍了目前应用较多的随机过程模型,以及求解概率密度函数方程的Monte Carlo算法。最后引用两个例子说明概率密度函数方法的优越性。
The probability density function (pelf) methods to solve the joint pdf equation of velocity and thermo-chcmical parameters for turbulent combustion are very promising, because the turbulent transfer and chemical reaction can beciliated correctly. IT can provide more information than other conventional turbulent models. In this paper the evolution equations for pdf of turbulent combustion arc derived. Some common stochastic models and Monte Carlo algorithm for solving the pdf equations are introduced. Two examples are analysed in order to show the advantage of the pdf methods.
出处
《力学进展》
EI
CSCD
北大核心
1990年第4期478-487,共10页
Advances in Mechanics
关键词
湍流
燃烧
概率密度函数
随机过程
turbutrnt combustion
probability density junction
stocliastic process
Monte Carlo algorithm
