摘要
在原始移动火焰锋面(MFF)模型的基础上,提出一种考虑碳粒表面还原反应的改进MFF模型。该模型给出了包括表面还原反应和 CO容积反应在内的碳粒燃烧反应速率的显式表达式,便于分析和讨论各种工况下碳粒的燃烧状态和影响因素。与原始的 MFF模型和单膜模型相比,所计算的颗粒温度和燃烧速率更符合严格的连续膜模型的预报结果,而计算时间只为连续膜模型的数十万分之一。研究结果表明,改进的 MFF模型是一种简单可行、适于工程应用的碳粒燃烧理论模型。
On the basis of the origina1 Moving Flame Front (MFF) model, considering the surface
reduction of carbon particle, an improved MFF model is put forward. Moreover, to analyze and discuss
the transition of various limiting combustion conditions and the influencing factors conveniently, an
explicit expression of combustion rate of carbon particle is given. Compared with the single-film model
and the original MFF model, predictions for particle temperature and combustion rate by the improved
MFF model are more comcident with those by the rigid continuous-film model, and the calculation
time is much less than that by continuous-film model. All those studies show that the improved MFF
model is a simple, accurate and appropriate carbon particle combustion theory model for engineering
application.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第3期511-514,共4页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展规划项目(G1999022209-04)
国家自然科学基金(50076025)
高校博士点基金(2000024806)
关键词
移动火焰锋面模型
碳粒
燃烧反应速率
表面还原反应
Moving Flame Front (MFF) model
carbon particle
rate of combustion
surface reduction
