含悬浮固粒的旋转射流剪切层稳定性研究

本文在理想不可压旋转圆射流的运动方程中添加了固粒作用项，由此推得了时间增长率的表达式，进而得关于含悬浮固粒放置射流稳定性的修正瑞利稳定性准则，求出了不同固粒质量密度固－气脉动速度比值，固气脉动速度相位差及Ｓｔｏｋｅｓ数情况下旋转射流场的增长率与径向空间波数的关系曲线，在比较这些曲线的基础上，给出了关于固粒属性对旋转射流场稳定性影响的几个重要结论为控制旋转射流场和后续发展提供了依据。

THE RESEARCH ON THE STABILITY OF SWIRLING JET SHEAR LAYER CONTAINING SUSPENDED SOLID PARTICLES

By employing potential theory, expressions of the relation between perturbation growth rate and radial perturbation wavenumber are derived for swirling jet shear layer containing suspended solid particles. Modified Rayleigh criterion for stability of this flow is further presented. Based on the analysis of obtained results under different particle mass density, particle-gas perturbation velocity ratio, particle-gas perturbation velocity phase difference and Stokes number, several important conclusions about the effect of particles on the stability of swirling jet shear layer, which provides reasonable evidences for controls over the swirling jet flow and its subsequent development, are presented.