摘要
采用标量联合的概率密度函数方法,对钝体驻定的湍流射流扩散Sydney火焰HM1进行数值模拟,结合当地自适应建表方法加速化学反应计算,用修正的LRR-IP雷诺应力模型求解速度场.首次对3种不同规模的甲烷化学反应动力学机理进行研究,并与实验数据进行比较,结果表明,模型和反应机理很好地预测了速度场和标量场的变化及局部熄火现象,而考虑反应机理中的C2化学对火焰HM1的影响不大.
A joint-scalar probability density function （PDF） model is used to simulate bluff-body stabilized turbulent non-premixed Sydney flames HM1. In Situ Adaptive Tabulation （ISAT） algorithm is used to accelerate chemistry calculations. A modified LRR-IP Reynolds stress model is applied to obtain mean flow and turbulent mixing fields. We consider three chemical kinetical schemes for methane chemistry. Simulation results are compared with experimental data. It shows that the model and mechanisms predict flow field, scalar field and local extinction well. C2 chemistry has minor effect on flame HM1.
出处
《计算物理》
EI
CSCD
北大核心
2008年第6期733-743,共11页
Chinese Journal of Computational Physics
基金
国家自然科学基金(50506028)资助项目
关键词
概率密度函数方法
当地自适应建表
钝体驻定扩散火焰
局部熄火
probability density function method
in Situ adaptive tabulation
bluff-body stabilized non-premixed flame
local extinction
