摘要
建立了在介观尺度内,考虑挥发分在颗粒边界层内均相着火及燃烧的移动火焰锋面模型(简称MFFVC模型).此模型弥补了挥发分现有计算方法中未考虑颗粒边界层内挥发分着火燃烧的不足.与挥发分现有计算方法相比,MFFVC模型预报与Jost实验数据符合更好.MFFVC模型与扩散控制的挥发分燃烧(DLVC)模型预报一致,但火焰锋面确定条件相比更具有物理意义.MFFVC模型采用高温下可燃气体着火体积分数极限的概念来确定挥发分均相着火,这与利用Semenov准则判断着火的有限容积火焰锋面(FVFM)模型预报一致.
A moving flame front model for volatile combustion （MFFVC） after homogeneous ignition is established. The model improves conventional calculating method, which takes no account of oxidizing volatiles in the particle boundary. Compared with the results by the conventional method, the predicted results by MFFVC are closer to the experimental data. Good agreement is also achieved between MFFVC and the diffusion limited volatiles combustion model （DLVC）. But the method of locating the flame front in MFFVC has more physical meaning than that of DLVC. The MFFVC model uses the concept of firing concentration limit under high temperature to determine homogeneous ignition, which is in accordance with the ignition prediction by the finite volume flame model （FVFM） in which the Semenov criterion is employed.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2009年第5期451-456,共6页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(50736006)
国家重点基础研究发展计划(973)资助项目(2004CB217703
2006CB200303)
关键词
移动火焰锋面模型
挥发分燃烧
均相着火
着火体积分数极限
moving flame front （MFF） model
volatile combustion
homogeneous ignition
firing concentration limit
