小放热和高爆轰极限下ZND爆轰的高频渐近性和一维稳定性
High-frequency asymptotics and 1-D stability of ZND detonations in the small-heat release and high-overdrive limits
摘要:
我们建立一维光谱,或“正常模式”,稳定性的ZND爆轰在小的热释放限制和相关的高的热释放和活化能的限制举行固定,验证数值观测Erpenbeck在20世纪60年代。关键的技术点是一个战略性的参数重新调整转换的无限大的限制,有限的,经常扰动问题,并仔细的高频分析均匀依赖于模型参数。后者恢复的重要结果,高频稳定性建立的Erpenbeck有点不同的技术。值得注意的是,这里使用的技术产生的定量估计非常适合数值稳定性调查。
英文摘要:
We establish one-dimensional spectral, or "normal modes", stability of ZND detonations in the small heat release limit and the related high overdrive limit with heat release and activation energy held fixed, verifying numerical observations of Erpenbeck in the 1960s. The key technical points are a strategic rescaling of parameters converting the infinite overdrive limit to a finite, regular perturbation problem, and a careful high-frequency analysis depending uniformly on model parameters. The latter recovers the important result of high-frequency stability established by Erpenbeck by somewhat different techniques. Notably, the techniques used here yield quantitative estimates well suited for numerical stability investigation.
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