用拟谱方法对混合层四涡合并的规律进行了数值研究 .分析了基波和次谐波之间相位差对涡合并过程的影响 ,并引入旋转点和拉伸点的概念对这种影响进行了解释 .计算结果表明 :四涡的合并存在 6种形式 ,因此 ,可以通过施加多级次谐波并改变它们之间的相位差来主动控制拟序涡的发展和演变 . The quasi-spectral method was used to study the four-vortex mergence law of mixed layers. The influence of the phase difference between fundamental and subharmonic on the vortex merger process was analyzed, and the concept of turning points and stretching points was introduced The results show that there are six forms of the merger of four vortices, so the development and evolution of the proposed vortex can be actively controlled by applying multi-order harmonics and changing the phase difference between them.