氢氧预混气体燃烧过程的数值研究  

Numerical Simulation of Premixed H_2/O_2 Combustion

作　　者：刘银河[1] 张云[1] 赵振兴[1] 林明森[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《核动力工程》2016年第3期152-157,共6页Nuclear Power Engineering

摘　　要：建立了氢氧预混气体燃烧过程的数学模型,分析点火位置、反应机理和基元反应动力学参数对氢气燃烧过程的影响。研究发现:浮升力作用对火焰的传播有明显影响,采用顶部点火更有利于安全可控地消除氢气;不同点火位置下,火焰锋面移动相同距离时氢气消耗量几乎相等;Marinov氢氧反应机理和Warnatz氢氧反应机理预测的氢气燃烧过程较为一致;HO_2形成/消耗反应模块是Marinov机理和Warnatz机理中的制约反应模块,其反应速率对反应机理的总反应速率影响较大。A mathematical model was established to simulate the combustion of the premixed hydrogen and oxygen in this paper, and the influences of the ignition position, the reaction mechanism and elementary reaction kinetic parameters on the combustion process were analyzed. The results show that buoyancy has significant influence on the flame propagation. The top ignition method is more beneficial for controllable and safe eliminating of hydrogen. The amounts of consumed hydrogen are nearly equal when the flame propagates the same distance for the two ignition positions. Additionally, the predicted hydrogen combustion processes according to Marinov and Warnatz mechanisms show good consistency with each other. The HO2 formation/consumption reactions are the limiting reactions in the Marinov and Warnatz mechanisms, and their reaction rates greatly affect the total reaction rate.

关 键 词：氢气燃烧 数值模拟 基元反应 浮升力 

分 类 号：TL36[核科学技术—核技术及应用]