In order to reveal the regularity of two-phase flow in the molten salt pump

an experimental method of a molten salt pump was researched

and the external performances were obtained. The internal flow field near the volute tongue was measured by using PIV (particle image velocimetry) technology. Unsteady numerical simulation of two-phase flow in the molten salt pump was carried out. The differences between experiment and numerical simulation results were elaborated. The distribution of volume fraction of crystal particles was obtained and its evolutional regularity was analyzed. The results show that the distribution of volume fraction of crystal particle is stable in the molten salt pump. In the impeller

particles are accumulated near the suction side of blades. The particle volume fraction is affected significantly by the particle diameter. The larger particle size means more obvious particle accumulation phenomenon. The molten salt pump outlet's static pressure fluctuates periodically

and the amplitude of pressure fluctuation is affected by the particle volume fraction distribution in the impeller passage.