摘 要：采用正交试验的方法对纸浆泵叶轮上排气孔参数进行设计。通过数值模拟性能预测、研究分析，确定排气孔参数对性能影响的主次关系。采用综合性能评价函数确定排气孔参数最佳方案：排气孔个数Zd 为8，直径D为20 mm，径向距离R1 为130 mm，周向位置θ为15°。如通过样机试验得到优化后纸浆泵的性能特性，研究发现流量在0.8Q、1.0Q、1.2Q时，优化后的扬程、水力效率和气液分离效率分别提高了5%、7%和20%，排气孔参数优化后气液分离效果尤为明显，满足设计要求。

Abstract: The parameters of degas hole on impeller were optimized by the orthogonal test.4 factors,degas hole number Zd ,diameter of degas hole D,Radial distance,R1 ,and circumferential positionθ ,were tested with each factor having 3 different levels.Based on L9(34 ) orthogonal experiment,9 cases were designed.The best case was chosen after orthogonal test analysis and experimentally tested according to the numerical results of pulp pump model.The head,hydraulic efficiency and gas-liquid separation were improved by 5%,7% and 20% at 0.8Q,1.0Q and 1.2 Q flow rates,respectively,compared to those before optimization.

TH31

四川省教育厅项目（172467）；西华大学校重点基金（Z1620408）;西华大学青年学者后备人才项目