Basic condition assumption of two-phase flow of slurry pump.

The assumption of the basic conditions of the two-phase flow of the slurry pump refers to several preconditions that need to be assumed when using the two-phase flow theory to study the wear-resistant slurry pump.

Since the liquid-solid two-phase flow inside the flow field of the slurry pump is very complicated, not only the solid phase particles but also the dynamic and static interference of the impeller and the pressurized water chamber and the wear of the overcurrent components are involved;

The turbulence model and the two-phase flow model introduced in the calculation process can not accurately reflect the real flow situation. In order to simplify the calculation analysis process without distortion, several ideal constraints must be met in the flow field.

The basic conditions for the two-phase flow of the slurry pump are assumed:

1. The main phase (liquid phase) is an incompressible fluid (liquid density is constant), and the secondary phase (solid phase) follows Euler's continuum model principle, and the physicochemical properties of each phase remain unchanged in the flow;

2. The particle diameter of the solid phase satisfies the ideal condition, and there is no phase change;

3. It is assumed that the flow in the flow path of the slurry pump is a constant flow. The multi-coordinate system reference method is used to establish a fixed coordinate system on the pressurized water chamber and a rotating coordinate system that moves simultaneously with the impeller, and the flow field in the impeller and the pressurized water chamber. The flow control equations are calculated separately in the region, and the flow field information exchange at the interface between different regions is performed by the relative velocity of the fluid particles to the absolute velocity.