Analysis on Turbulent Flow in the Impeller of Chemical Pump

To study the phenomena of two-phase flow with salt crystallizing in the chemical pump, the 3-D turbulent flow in the impeller of chemical pump was simulated under the condition of rinsing. The internal flow between the impellers of 1H65 chemical pump was investigated. Based on the Reynoldsaveraging N-S equations and the standard k -ɛ two equations turbulent model, the simulations of turbulent flow between the impellers are performed by using the flow computing software Fluent under different operating conditions. The calculation results are compared with the experimental data by particle image velocimetry (PIV). Based on the analysis of the calculated results of velocity and pressure profiles in the chemical pump and experimentally observed phenomenon of flow impact, secondary flow and recirculation, some design improvements are proposed, which give suggestions on the optimal design and internal two-phase flow study of the chemical pump.