摘要
通常实际湍流火焰中不同燃烧区域的化学反应特性大不相同,且辐射在热传递过程中扮演了非常重要的角色。该文采用辐射模型离散坐标DO法来完善自适应化学理论。基于详细化学反应机理,在不同区域使用不同的简化反应模型来进行化学项的求解。针对甲烷,空气预混火焰,该文对其燃烧行为进行了合理的重现,考虑辐射模型之后的计算结果与试验结果吻合得更好。
Most industrial flames are turbulent, exhibit different zones with totally diverse chemistry and have radiation as the dominant heat transfer process. The $4 quadrature version of the discrete ordinates radiation model is applied together with the Adaptive Chemistry （AdapChem） reduced kinetics modeling to a laboratory-scale, axisymmetric, co-flowing partially premixed methane/air laminar flame, previously predicted with success with AdapChem alone and with experimental data reported in the open literature, to assess the effects of radiation on the distributions of other variables. Predicted results using the discrete ordinates method, that are compared herein with the experimental values reported in the open literature and with those predicted with AdapChem alone, showed that temperatures and species concentrations exhibit significant variations when radiation is considered. Nevertheless, the flame topology in terms of reaction structure remains essentially unchanged, although some differences are noticed. The predicted results approach more closely the experimental ones when radiation calculations are included.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第19期75-79,共5页
Proceedings of the CSEE
基金
国家自然科学基金项目(50276018
50325621)。~~
