ANALYSIS OF TURBULENT FLOW IN THE IMPELLER OF A CHEMICAL PUMP

To study the phenomena of two-phase flow with salt crystallising in thechemical pump, the 3-D turbulent flow in the impeller of chemical pump wassimulated at the condition of rinsing. The internal flow between the impellers of1H65 chemical pump is investigated. Based on the Reynolds-averaging N-Sequations and the standard k-ε two equations turbulent model, the simulationsof turbulent flow between the impellers are performed using the flowcomputing software Fluent under different operating conditions. The calculationresults are compared with the experimental data by particle image velocimetery(PIV). Based on the analysis of the calculated results of velocity and pressureprofiles in the chemical pump and experimentally observed phenomenon offlow impact, secondary flow and recirculation, some design improvements areproposed, which give suggestions on the optimal design and internal two-phaseflow study of the chemical pump.