以大涡模拟方法为基础，建立了圆环旋转黏性射流的仿真模型，对圆环旋转黏性射流的破碎过程及表面波结构进行了研究。结果表明：气液两相速度分布的不同会导致液膜出现空洞，空洞长大融合后会使液膜破碎为分裂液丝；长径比在3~15的分裂液丝占总数的83.2%；在惯性力的主导作用下，分裂液丝会发生颈缩现象，破碎成多个分裂液滴；在气相扰动和湍流脉动的共同作用下，在圆环旋转黏性射流的液膜表面会形成表面波；当轴向速度在100~150 m/s范围内增大时，轴向表面波波长增长率明显增加；随着周向速度的增大，圆环旋转黏性射流周向表面波波长的增长速率会逐渐增大。

Based on the large eddy simulation method, the simulation model of annular swirling viscous jet was established and the breakup process and surface wave of annular swirling viscous jet were studied. The results show that the difference of velocity distribution between gas and liquid will lead to cavity in the liquid film. The cavity becomes larger and merges with others, and then the liquid film breaks into liquid ligaments. The liquid ligaments with a lengthtodiameter ratio of 3-15 account for 83.2% of the total. Under the leading role of inertia force, the split liquid ligaments show a necking phenomenon and break into droplets. Under the action of aerodynamics and turbulent pulsation, the surface wave forms on the surface of liquid sheet. When the axial velocity increases in the range of 100-150 m/s, the wavelength growth rate of axial surface wave obviously increases. With the increase of circumferential velocity, the wavelength growth rate of circumferential surface wave gradually increases.