Influence research on different dustpan type inlet channel configurations on pump hydraulic performance

To investigate the impact of different dustpan type inlet channel configurations on the hydraulic performance of pumps, three inlet channel schemes were designed in this study.Numerical simulations were conducted based on the CFD software k-ε turbulence model.The optimal inlet channel was selected for numerical simulation of the entire water pump device, and the hydraulic characteristics under different blade placement angles were compared and analyzed through model experiments to verify the rationality of the water pump device design.The final results showed that: ① When the design head of the pump device is 3.70 m and the flow rate was 5.38 m³/s, the optimal placement angle of the blades was 0°, the efficiency was 73.80%, and the critical cavitation margin was 7.26 m.② At a maximum net head of 4.70 m and a pump flow rate of 5.04 m³/s, the efficiency was 76.58% and the critical cavitation margin was 7.18 m.③ At different blade angles, the water pump device model ran smoothly from a net head of about 0.7 m to entering the saddle area. ④ The difference in blade pulsation amplitude was small, and the water pressure pulsation had no significant impact on the operation of the unit, highlighting the advantages of the dustpan type inlet channel.