正压涡旋中螺旋波失稳问题的研究

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基金项目: 国家重点基础研究(G1998040907);国家自然科学基金(49875008)资助

STUDY ON DESTABILIZATION OF SPIRAL WAVE IN BAROTROPIC VORTEX

Meteorological College, P. L. A. University of Science and Engineering, Nanjing 211101, China

摘要: 将柱坐标下线性化正压原始方程组与其边界条件构成的特征值问题,离散化为矩阵的特征值问题并进行数值求解,研究了正压涡旋中螺旋波的失稳问题。讨论了基流分布和静止流体厚度对正压涡旋内螺旋波失稳的影响,这对了解实际热带气旋中螺旋云带的发生和性质均是有意义的。
- 涡旋 /
- 失稳 /
- 螺旋波
Abstract: The barotropic primitive equations with boundary condition in the cylindrical coordinate are transformed into an eigenvalue problem of a matrix by use of the discretization method,and it can be solved. The destabilization problem of spiral wave in a barotropic vortex is studied here. The influence of the basic flow and the static fluid thickness on the destabilization is also discussed. It is important to understand the occurrence and property of spiral cloud band in tropical hurricane.
- vortex /
- destabilization /
- spiral wave

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