Abstract: Modeling and meshing the spinning cup of air-extracting type rotor spinning by using the computational fluid dynamics software FLUENT, two-dimensional numerical simulation of flow field in the rotor by finite volume method, obtained the velocity vector distribution and the X-axis direction and Y-axis direction speed of two section. The results revealed the flow characteristics in the cup, the flow speed was between 20m/s and 150m/s, the velocity distribution of the section also illustrates the movement trend of the fiber, verified the feasibility of the FLUENT software in research of the airflow in spinning cup.

Key words: rotor spinning, spinning cup, numerical simulation, airflow field