Fundamental aspects of the heterogeneous flame in the self-propagating high-temperature synthesis (SHS) process
Fundamental aspects of the heterogeneous flame in the self-propagating high-temperature synthesis (SHS) process
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DOI：
10.1016/s0360-1285(00)00004-6
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发表时间：
2001
影响因子：
29.5
通讯作者：
A. Makino
中科院分区：
文献类型：
--
作者：
A. Makino
综述了控制自蔓延高温合成（SHS）过程基本机制的最新进展，该过程的特点是通过压实的反应颗粒基质进行火焰传播，并被认为在生产新型固体材料方面具有实际意义。这里的重点不仅在于燃烧波中非均质性质的理论描述（传统的均质介质预混火焰理论尚未捕获这一点），而且还在于文献中预测结果与实验结果之间的广泛比较。包括的主题包括用于推导非均质理论控制方程的统计计数程序、绝热条件下的火焰传播、热损失条件下的火焰传播和熄灭、双峰粒子分散对燃烧行为的影响、电流外部加热的影响、从稳定燃烧到脉动燃烧的过渡边界以及使用外部加热源引发燃烧波。燃烧波中的不均匀性（即非金属或高熔点金属的颗粒尺寸）的重要性已经被强调，以从根本上理解火焰传播、熄灭和引发等燃烧行为。还建议了潜在有前途的研究课题。
Recent progress on understanding fundamental mechanisms governing the Self-propagating High-temperature Synthesis (SHS) process, which is characterized by the flame propagation through a matrix of compacted reactive particles and is recognized to hold the practical significance in producing novel solid materials, is reviewed. Here the focus is not only on the theoretical description of the heterogeneous nature in the combustion wave, which has not been captured by the conventional premixed-flame theory for a homogeneous medium, but also on the extensive comparisons between the predicted and experimental results in the literature. Topics included are the statistical counting procedure used for deriving governing equations of the heterogeneous theory, flame propagation in the adiabatic condition, flame propagation and extinction under heat loss conditions, effects of bimodal particle dispersion on the combustion behavior, those of external heating by electric current, the transition boundary from steady to pulsating combustion, and the initiation of the combustion wave by use of the external heating source. The importance of heterogeneity in the combustion wave, that is the particle size of the nonmetal or the higher melting-point metal, has been emphasized for fundamental understanding of such combustion behavior as flame propagation, extinction, and initiation. Potentially promising research topics are also suggested.