To study the effect of guide vane outlet angle on pump performance and impeller radial force in an axial-flow heart pump,guide vane outlet angle β4 is considered to be 20°,15°,10°,5° and 3°re...To study the effect of guide vane outlet angle on pump performance and impeller radial force in an axial-flow heart pump,guide vane outlet angle β4 is considered to be 20°,15°,10°,5° and 3°respectively. Based on ANSYS Fluent,numerical results of pump head and efficiency are validated by experiment results,in which Xanthan gum solutions are used with concentration of 0.06 wt. % as working fluid. Then,the effects of β4 on pump performance and impeller radial force are discussed,the errors of head and efficiency between test and simulation are within 5%. The results also indicate that the pump performance and efficiency are much better than those of other angles when guide vane outlet angle β4 is 10°,and the maximum variations in head and efficiency are 1. 9% and2. 2%,respectively. With β4 increasing,the pulsation of radial force decreases firstly and then increases,when β4 is 10°,the minimum pulsation is 0.0392 N,which is about 80% of the maximum pulsation amplitude.展开更多
The paper refers to the analysis of interactions between the impeller and the vaned diffuser based on the air model of a radial flow pump.The study deals with a numerical simulation of the flow for a full 360°ent...The paper refers to the analysis of interactions between the impeller and the vaned diffuser based on the air model of a radial flow pump.The study deals with a numerical simulation of the flow for a full 360°entire impeller and diffuser.The task is carried out closely under the design operating conditions and for one particular position of the impeller blade with respect to the diffuser frame.Among all the results,the focus is mainly on the flow pattern at the exit part inside the impeller facing the diffuser vanes.The results are compared to the available PIV measurements.展开更多
基金Supported by the National Natural Science Foundation of China(No.51574161)the Education Science Project of Young and Middle-aged Teachers of Universities in Fujian Province(No.JZ160396)
文摘To study the effect of guide vane outlet angle on pump performance and impeller radial force in an axial-flow heart pump,guide vane outlet angle β4 is considered to be 20°,15°,10°,5° and 3°respectively. Based on ANSYS Fluent,numerical results of pump head and efficiency are validated by experiment results,in which Xanthan gum solutions are used with concentration of 0.06 wt. % as working fluid. Then,the effects of β4 on pump performance and impeller radial force are discussed,the errors of head and efficiency between test and simulation are within 5%. The results also indicate that the pump performance and efficiency are much better than those of other angles when guide vane outlet angle β4 is 10°,and the maximum variations in head and efficiency are 1. 9% and2. 2%,respectively. With β4 increasing,the pulsation of radial force decreases firstly and then increases,when β4 is 10°,the minimum pulsation is 0.0392 N,which is about 80% of the maximum pulsation amplitude.
文摘The paper refers to the analysis of interactions between the impeller and the vaned diffuser based on the air model of a radial flow pump.The study deals with a numerical simulation of the flow for a full 360°entire impeller and diffuser.The task is carried out closely under the design operating conditions and for one particular position of the impeller blade with respect to the diffuser frame.Among all the results,the focus is mainly on the flow pattern at the exit part inside the impeller facing the diffuser vanes.The results are compared to the available PIV measurements.
