A Study on the Stability of a Swirling Jet Shear Layer Containing¡¡
Suspended Solid Particles Under a Non-axisymmetric Perturbation
Zhou Zexuan, Lin Jianzhong
(Zhejiang University, Hangzhou, 310027, P.R.China)

Abstract: By 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.
Keywords: stability, swirling jet shear layer, non-axisymmetric perturbation, suspended solid particles, numerical computation