非轴对称扰动下含悬浮固粒旋转射流场稳定性研究  

A Study on the Stability of a SwirlingJet Shear Layer Containing Suspended Solid Particles Under a Nonaxisymmetric Perturbation

作　　者：周泽宣[1,2] 林建忠[1,2] 

机构地区：[1]浙江大学 [2]杭州应用工程技术学院

出　　处：《应用力学学报》1998年第2期12-17,共6页Chinese Journal of Applied Mechanics

基　　金：浙江省自然科学基金青年科技人才专项资金资助

摘　　要：考虑含有悬浮固粒的理想不可压旋转圆射流的运动方程，借助势流理论推得扰动增长率随径向波数变化的表达式，进而得到含悬浮固粒射流稳定性的修正瑞利稳定性准则，求出了非轴对称扰动下不同扰动阶数、固粒质量密度、固－气脉动速度比值、固－气脉动速度相位差、斯托克斯数时旋转射流的增长率曲线。然后根据修正瑞利稳定性准则分析给出了关于悬浮固粒的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合理的依据。y employing potential theory, the expressions of the perturbation growth rate varying with radial perturbation wavenumbers are derived for a swirling jet shear layer containing suspended solid particles under a nonaxisymmetric perturbation. Modified Rayleigh criterion for the stability of this flow is presented. Based on the results obtained under different particle mass densities, particlegas perturbation velocity ratios, particlegas perturbation velocity phase differences and Stokes numbers, several important conclusions on the effect of particles on the stability of a swirling jet shear layer are provided. These conclusions are useful for controls of a swirling jet flow and its subsequent development.

关 键 词：稳定性 非轴对称扰动 旋转射流剪切层 悬浮固粒 数值计算 

分 类 号：O358[理学—流体力学]