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首页> 外文期刊>Combustion Science and Technology >COMPARISON OF FLAME-FRONT INSTABILITIES WITH INSTABILITIES OF ABLATION FRONTS IN INERTIAL-CONFINEMENT FUSION
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COMPARISON OF FLAME-FRONT INSTABILITIES WITH INSTABILITIES OF ABLATION FRONTS IN INERTIAL-CONFINEMENT FUSION

机译：惰性约束融合中火焰前缘不稳定性与消融前缘不稳定性的比较

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摘要

There are both similarities and differences between instabilities of planar laminar flame fronts and ablation fronts in inertial-confine-ment fusion (ICF). The mathematical formulation pf the problem in ICF is the same as for flames propagating upward; the differences stem from the different order of magnitude of the Froude number and thermal conductivity variations. When the thermal conductivity varies strongly, as in ICF, a wide range of characteristic diffusive lengths occurs across the wave structure. For disturbances with intermediate wavelengths, there is then a universal diffusive relaxation rate of thermal waves that is independent of the thermal conductivity. A kinematic relation for the ablation front is discussed here that includes this thermal relaxation. The resulting formulation facilitates comparison of the two types of fronts.
机译：惯性约束聚变（ICF）中的平面层流火焰锋和烧蚀锋的不稳定性既有异同，又有差异。 ICF中的问题的数学公式与向上传播的火焰相同。差异源自弗洛德数和导热系数变化的数量级。当热导率发生剧烈变化时（如ICF中一样），整个波结构会出现很大范围的特征扩散长度。对于中间波长的干扰，则存在与热导率无关的热波的普遍扩散弛豫率。这里讨论了消融锋面的运动学关系，其中包括这种热松弛。生成的公式有助于比较两种类型的前沿。

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