Dynamic Mode Decomposition 방법의 적용
Dynamic Mode Decomposition 방법의 적용
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发表时间：
2017
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通讯作者：
P. Kumar;Jeong-Yeol Choi;J. Son;C. Sohn
中科院分区：
文献类型：
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作者：
P. Kumar;Jeong-Yeol Choi;J. Son;C. Sohn
采用动态模态分解（DMD）方法对非定常激波诱导燃烧的周期性特征进行了深入研究。采用4层网格对退火炉实验进行了数值模拟。FFT结果表明，几乎所有的网格系统的振荡频率在430-435 kHz和测量的一个约为425 kHz。为了识别更多的低频谐振模式，采用DMD方法对四网格系统进行了分析。同时提取了几个主要频率，计算了它们的阻尼系数，作为稳燃的量化参数。
Dynamic mode decomposition (DMD) method was applied for the further study of periodical characteristics of the unsteady shock-induced combustion. The case of Lehr’s experiments was numerically simulated using 4 levels of grids. FFT result reveals that almost all the grid systems oscillate at frequencies around 430-435 kHz and the measureed one is around 425 kHz. To identify more resonant modes with low frequencies, DMD method is adopted for 4 grid systems. Several major frequencies are extracted and their damping coefficients are calculated at the same time, which is a quantification parameter for combustion stabilization.