Preliminary study on internal flow simulation of centrifugal dredge pump by SPH algorithm

In order to simulate the internal flow of centrifugal dredge pump accurately and efficiently, a meshfree simulation method is proposed, which is a method of smooth particle hydrodynamics (SPH). The fluid domain is discretized into Lagrangian particles, the blades, the pump body are discretized as solid particles, the governing equations for fluid, and solid mechanics are transformed into corresponding particle force. When the initial state is started, the particles move and continue to evolve under the action of these forces. The motion parameters of the flow field and solid can be obtained by interpolating the kernel function with the information of particle. The correctness of the control equations and the boundary conditions is verified by simulating the standard examples. The preliminary analysis of using this method to simulate the movement of the two-dimensional centrifugal dredge pump shows that the simulation results are reasonable. It lays theoretical basis for 3-dimensional simulation of internal flow and transition process of centrifugal dredge pump by SPH algorithm. It will be very conducive to reveal the internal transient flow mechanism of flow system transition process in centrifugal dredge pump, which is of great theoretical significance to ensure the reliable and stable operation of dredge pump system.