Influence of radiation losses on the stability of premixed flames on a porous-plug burner
Influence of radiation losses on the stability of premixed flames on a porous-plug burner
复制标题
辐射损失对多孔塞燃烧器预混火焰稳定性的影响
DOI：
10.1016/j.proci.2012.06.039
复制
发表时间：
2013
影响因子：
4.4
通讯作者：
M. Sánchez
中科院分区：
文献类型：
--
作者：
V. Kurdyumov;M. Sánchez
采用有限活化能的扩散热模型对多孔塞上的平面预混火焰进行了数值分析。研究了辐射热损失对火焰射距及其线性稳定性的影响。我们表明，体积热损失的存在限制了质量流量范围的范围，以及它可以促进不同种类的火焰不稳定性，振荡和细胞。对于自由传播火焰，通常在刘易斯数大于1时可以观察到振荡不稳定性，而在多孔塞的情况下，对于刘易斯数为1和低于1的火焰也会出现振荡不稳定性。对于Le<1的火焰，在一定的流量范围内，可以同时观察到胞状不稳定性和振荡不稳定性。
Analysis of the planar premixed flames on a porous plug was performed numerically for finite activation energy within the diffusive-thermal model. The paper is focused on the influence of radiation heat loses on the flame standoff distance and its linear stability. We show that the presence of volumetric heat losses limits the range of the mass flow range as well as it can promote the flame instabilities of different kinds, both oscillatory and cellular. The oscillatory instability, which for freely propagating flames can be usually observed for the Lewis number larger than one, in the porous-plug case occurs also for flames with unity and lower than unity Lewis number. For flames with Le<1 both cellular and oscillatory instabilities can be observed simultaneously in a certain range of the mass flow rate.