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以流道式导叶内损失最小、效率最高为目标,对1 000 MW级核电站用喷淋泵流道式导叶型线进行水力优化设计。单级优化结果表明,流道式导叶采用均匀过渡的外缘型线时,流动损失小,波动持续区域较短,有较长的压力平缓变化区域;所设计的四种外缘型线中D的导叶模型扬程最高、效率最高,导叶内部流动转化过程均匀,从过渡段到出口部分,压力持续平稳。利用分析所得的最优方案重新绘制流道式导叶,对整机进行数值验证,分析表明导叶内的流动损失降低了40.6%,效率提高了7.71%。
With the goal of minimizing the loss and maximizing the efficiency of the runner guide vane, the hydraulic optimization design of the runner guide vane of a spray pump at a 1 000 MW nuclear power station was carried out. The results of single-level optimization show that when the flow guide vane adopts a uniform transitional outer profile, the flow loss is small, the continuous fluctuation region is short and the pressure is slowly changing. In the four designed outer profile lines D guide vane model lifts the highest, the highest efficiency, internal flow guide vane conversion process evenly, from the transition section to the export part of the pressure continued steady. Using the optimal solution from the analysis, the flow guide vane was redrawn to verify the whole machine. The analysis showed that the flow loss in the guide vane was reduced by 40.6% and the efficiency increased by 7.71%.