喉管进口喇叭口型线对射流泵抽吸性能的影响OA

To improve the suction performance of a jet pump,the inlet flare profile of the throat inlet was optimized based on the centrifugal pump impeller flow channel design method.Three sets of com-parative schemes were constructed by controlling the smoothness of the curve of the flow channel cen-terline and the cross-sectional area variation curve.Numerical simulations were performed to compare the internal flow field,velocity distribution,pressure distribution and vorticity characteristics,to reveal the influence of the flow profile on the flow characteristics and energy loss inside the pump.An experi-mental test platform was built to verify the simulation results through field measurements.The results show that the optimized throat inlet flare profile can significantly improve the internal flow pattern inside the pump,reduce local flow losses and vortex dissipation,effectively lengthen the jet core region and expand the low-pressure zone,thereby enhancing the suction capacity.Scheme 2,with the smoo-thest cross-sectional area variation curve achieves the optimal performance,increasing the absorbed liquid flow rate by 16.16％compared to the prototype and by 15.78％in experimental measurements.The errors between simulation and experiment are less than 2％,verifying the accuracy of this proposed design method.The smoother the flow channel profile,the more effectively it can suppress flow separa-tion and reduce energy loss.The relevant conclusions can provide reliable methods and theoretical sup-port for the structural optimization and performance improvement of jet pumps.