斜流泵叶轮的多参数组合优化

发布时间：2019-05-10 04:20

【摘要】：以比转速为392的斜流泵为研究模型,选取叶片出口安放角、叶片出口边宽度、后盖板倾角3个参数作为研究变量,采用CFD方法对斜流泵性能进行了多参数组合优化的数值计算,并根据性能试验数据验证了CFD数值方法的准确性。基于Box-Behnken试验建立3因素3水平共17组叶轮模型的试验表并对各方案设计工况下的内流进行了数值计算。采用二次响应面模型拟合效率的性能预测模型,给出目标函数,基于遗传算法对目标函数进行求解。结果表明,对效率影响最为显著的参数为叶片出口安放角,其次为叶片的后盖板倾角,且效率均随二因素的增大而减小,叶片出口边宽度对其影响最小;与原模型叶轮叶片参数相比,β2、b2大于原模型参数,T2保持不变,优化结果显示模型泵水力效率提高1.2%,扬程提高了0.8%。
[Abstract]:Taking the oblique flow pump with specific speed of 392 as the research model, three parameters, namely, the outlet placement angle of the blade, the width of the outlet edge of the blade and the inclination angle of the rear cover plate, are selected as the research variables. The multi-parameter combination optimization of the performance of the oblique flow pump is carried out by using CFD method. The accuracy of CFD numerical method is verified according to the performance test data. Based on Box-Behnken test, the test table of 17 groups of impeller models with 3 factors and 3 levels is established, and the internal flow under the design conditions of each scheme is calculated. The quadratic response surface model is used to fit the performance prediction model of efficiency, and the objective function is given, and the objective function is solved based on genetic algorithm. The results show that the most significant parameter affecting the efficiency is the outlet placement angle of the blade, followed by the inclination angle of the rear cover plate of the blade, and the efficiency decreases with the increase of the two factors, and the width of the outlet edge of the blade has the least effect on it. Compared with the original model impeller blade parameters, 尾 2 and b 2 are larger than the original model parameters, T2 remains unchanged, the optimization results show that the hydraulic efficiency of the model pump is increased by 1.2%, and the lift is increased by 0.8%.
【作者单位】：浙江同济科技职业学院;
【分类号】：TH31

【相似文献】