To date, the influence of non-linear stratifications and two layer stratifications on internal wave propagation has been studied for two-dimensional wave fields in a cartesian geometry. Here, we use a novel wave generator configuration to investigate transmission in non-linear stratifications of axisymmetric internal wave. Two configurations are studied, both theoretically and experimentally. In the case of a free incident wave, a transmission maximum is found in the vicinity of evanescent frequencies. In the case of a confined incident wave, resonant effects lead to enhanced transmission rates from an upper layer to layer below. We consider the oceanographic relevance of these results by applying them to an example oceanic stratification, finding that there can be real-world implications.

中文翻译：

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非线性分层中的轴对称内波传输和共振干扰

迄今为止，非线性分层和两层分层对内波传播的影响已经在笛卡尔几何中对二维波场进行了研究。在这里，我们使用一种新颖的波发生器配置来研究轴对称内波非线性分层中的传输。从理论上和实验上研究了两种配置。在自由入射波的情况下，在倏逝频率附近发现传输最大值。在有限入射波的情况下，共振效应会导致从上层到下层的传输速率提高。我们通过将这些结果应用于示例海洋分层来考虑这些结果的海洋相关性，发现可能具有现实意义。