Study on the Morphology of Viscous Liquid Jet in a Coaxial Swirling Airflow
Based on the linear stability analysis method,considering the liquid viscosity,the coaxial rotating mo-tion and compressibility of the surrounding airflow,a mathematical model describing the viscous liquid jet in the coaxial rotating compressible airflow was established and verified,and the effects of the dimensionless rotation in-tensity of the airflow and the physical properties of the fluid on the unstable form of the liquid jet were studied.The results show that when the rotation speed of the surrounding airflow is small,it promotes the jet stability,continues to increase the dimensionless rotation intensity of the airflow,and begins to promote the splitting of the jet.With the increase of airflow rotation intensity,the jet disturbance develops along the circumferential direction,and the jet column becomes highly asymmetric.In the range of parameters studied in this paper,gas compressibility and gas-liquid density ratio surface tension can promote the instability of the jet and affect the spa-tial shape of the jet,especially in the circumferential direction,it can change the dominant mode of the jet and en-hance the asymmetry of the jet.Both surface tension and liquid viscosity are conducive to the jet stability.
万方数据
维普
