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扩展了圆域中涡旋流动的两层准地转轮廓动力学方法。阐述控制方程模型及其一些基本特性的数值实现。通过拟稳态线性稳定性分析,得出对称潜涡流小于4线的间断潜涡流分布情况。对于非稳定上层屏蔽朗肯旋涡情况的实验结果进行讨论,结果发现,支配扰动波长的变化导致在涡旋底部中心为主的上部旋涡结构中心的初始位移。
Extended two-level quasi-geostrophic dynamic method of vortex flow in circular domain. The numerical implementation of the governing equation model and some of its basic characteristics are described. Based on the quasi-steady-state linear stability analysis, the distribution of intermittent potential eddy currents with symmetrical latent eddy currents less than 4 lines is obtained. The experimental results of the Rankine vortex with unsteady upper shields are discussed. It is found that the dominant wavelength shift of the upper vortex structure centered at the bottom of the vortex results in the initial displacement.