Abstract: A new kind of polyconical cyclone was presented in separation of channel dredging slurry in this paper, aiming at its characteristics of particles fine disseminated and distribution in a wide range. Based on Reynolds Stress Model, the numerical simulation of the three-dimensional flow inside the cyclone was provided by using the software of Fluent, the pressure field and velocity field distribution characteristics was obtained and verified by comparing the simulated results with the experiments, which provided theoretical basis for further optimizing design of this type of polyconical cyclone.

Key words: Dredging mud, Hydrocyclone, Polyconical, Computational fluid dynamics, Numerical simulation