剪切流动中涡、声、热模式划分及相互作用的弱非线性分析

Weakly Non-Linear Analysis on identification of Vortex,Sound & Heat and Their Interactions in Shear Flow

本文用摄动法详细研究了非均匀流动中涡、声、热运动模式的划分及其相互作用问题．特别讨论了剪切流情形，得到的各阶摄动方程和声、涡运动方程具有清晰的物理含义．在此基础上着重探讨了声、涡一阶作用以及二阶涡的生成，由此解释了声学控制流动中的部分实验现象．

The identification of vortex,sound and heat motions and the interactionsamong them are discussed by means of velocity split and perturbation method inthis paper.Especially the shear flow is considered.All the obtained weakly nonlinear equations have clear physics concept. Basing on the analysis, the interaction between first order sound and vortex and the creation of the second ordervortex are studied and some experiment phenomena of airfoil flow ontrol by soundare explained.