摘要
针对采用概率密度函数(PDF)方法的湍流燃烧数值模拟,基于已有的颗粒层面局部敏感性分析,提出一种改进方法,以高效地估计对反应动力学参数的局部敏感性系数。该方法的两个关键思路为:评估化学反应对组分演化的重要程度;以"当前效应"估计"总体效应"。以部分搅拌反应器(PaSR)为研究对象,通过与直接计算的结果比较,证明了新方法的计算结果可作为直接计算的有效估计,能够有效预测各个化学反应对于系统的相对重要性。
For transported probability density function(TPDF) simulations of turbulent combustion,a highly efficient particle-level sensitivity analysis approach is proposed to compute the sensitivity of simulation results with respect to the chemical kinetic parameters.The two key steps in the approach are:1) quantify the importance of chemistry in the species evolution;2) approximate the solutions to particle sensitivity equation by neglecting its historic contribution.The newly proposed approach is applied to simulations of a partially stirred reactor(PaSR),and it is found that this approach is capable of predicting the relative importance of different reactions to the system.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2017年第1期208-212,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.91441202)
关键词
湍流燃烧模拟
敏感性分析
概率密度函数方法
turbulent combustion simulation
sensitivity analysis
transported probability density function(TPDF)