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Abstract To study the influence of different laws of guide vane angle on the performance of reactor coolant pump (RCP), five models of RCP with different guide vane were designed, and the three‐dimensional numerical calculation was carried out. Based on the entropy production theory, analysis of flow loss at part‐load, design, and the over‐load flow rate was investigated. The results show that under the design flow and over‐load flow condition, the head, and efficiency of the DY4 (RCP model of the fourth guide vane variation) model are the highest, and the best efficiency occurs at the design flow rate. Compared with the DY1 (RCP model of the first guide vane variation) model, the efficiency of RCP is increased by 3.68%. At design flow and over‐load flow, the distribution of pressure and velocity streamlines of the DY4 model pump is uniform and stable, the flow loss ratio in the guide vane and volute is the lowest, and the high‐value area is small. Under the condition of part‐load flow rate, the pump head and efficiency of DY5 (RCP model of the fifth guide vane variation) model are the highest, and the highest efficiency appears at 0.8Qd which is 1.69% higher than the best efficiency value of DY4. At the part‐load flow rate, the static pressure values in the guide vane and volute of the DY5 model pump are significantly higher than that of other models. The velocity change in the flow channel is uniform, and the flow loss in the guide vane and volute is the lowest. Compared with the part‐load flow rate condition, the hydraulic performance of the DY5 model pump under design flow rate and over‐load flow condition is lower than that of other models. |
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