Study on Throat Parameters for Partial Emission Pump with Conventional Speed

CFD technology was used in study of the partial emission pump,and changes 5 kind of throat parameters at the same time.The paper conversely calculates the result of numerical simulation and the test and discusses the impact of the changes of the throat parameters to the partial emission pump.The research show that When the throat diameter under 0.8Dd,head and efficiency decreases rapidly.When the throat diameter above 1.4Dd,head and efficiency a little higher than that in design conditions.The distribution of static pressure and total pressure is reasonable in the partial emission pump.With the increasing of throat parameters,high-lift coefficient increases,but the flow coefficient reduce.