Abstract: In this paper, the computational fluid dynamics numerical simulation software OpenFOAM is used to study the numerical simulation of a fan's dust removal process. A real dust removal fan equipment involves the flow of three phases: the gas phase, the dust particle state and the liquid spray. This paper abstracts a two-phase flow model of the gas phase and dust particles, and focuses on the transient simulation of the flow field changes in the dust removal fan. To this end, a mathematical model of the internal airflow of the wind turbine, which includes a Navier-Stokes partial differential equation that considers the centrifugal force and the coercive force caused by rotation, and a ${k}-\omega-\mathrm{SST}$ turbulence model, is established. The simulation results show that the velocity at the fan's tip is higher than that of the surrounding fluid, the tip moves the fluid to the direction of the tip movement, and the velocity closer to the tip is larger. In addition, under the given boundary conditions and initial conditions, the particle pressure field, velocity vector diagram, etc. are obtained, respectively, to visually and intuitively simulate the fan's dust removal process.

Key words: OpenFOAM ,  ,  , Numerical simulation ,  , Lagrangian particle tracking ,  , Dynamic mesh , Rotating machinery ,  , Parallel computing