基于Kriging-MIGA算法的离心泵叶片三元反问题优化  

3D inverse design optimization of centrifugal pump blades based on Kriging-MIGA algorithm

作　　者：王世成 杨军虎[1] 薛旺 王鸣帅 宋丹玉 WANG Shicheng;YANG Junhu;XUE Wang;WANG Mingshuai;SONG Danyu(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;College of Environmental and Chemical Engineering,Chongqing Three Georges University,Chongqing 404100,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]重庆三峡学院环境与化学工程学院,重庆404100

出　　处：《排灌机械工程学报》2025年第2期132-138,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(52169019);重庆市教委科学技术研究项目(KJQN202301206)。

摘　　要：针对离心泵叶轮叶片三元反问题载荷优化,提出一种优化方法.选取某一中比转数离心泵为原型泵,在不改变其轴面流道形状、叶片厚度分布等条件的基础上,利用三元反问题设计方法设计了前盖板前加载、后盖板后加载的叶轮叶片.采用拉丁超立方抽样的方法,建立了80个离心泵叶轮模型样本空间,通过Fluent软件数值模拟得到离心泵性能.以叶片载荷参数为优化对象,离心泵设计工况点水力效率为优化目标,利用Kriging代理模型建立了叶片载荷参数与水力效率的关系.在扬程满足设计要求的条件下,使用MIGA算法得到水力效率最高的离心泵载荷参数.结果表明:在载荷曲线中,对水力效率影响程度较大的参数为后盖板直线段与抛物线的两交点ND_(h)和NC h,以及前盖板直线段与抛物线交点NC_(s);影响较小的参数为后盖板前缘载荷LE_(h)和前盖板直线与抛物线交点ND_(s);在设计工况点,优化泵的水力效率提升了1.35%且高效区较宽;叶片表面最低压力升高了38.41%,空化性能得到了提升;另外,功率减小了2.46%,扬程稍有提升.研究结果可对离心泵叶轮叶片的高效设计提供一定的参考.An optimization method was proposed in this study for centrifugal pump impeller blade loa-ding using the 3D inverse design.A medium-specific speed centrifugal pump was selected as the research object,and the impeller blades with front-loading shroud and after-loading hub were redesigned using the 3D inverse problem design method without changing its axial projection,blade thickness distribution,and other conditions.The Latin hypercube sampling method was used to establish a sample space of 80 centrifugal pump impeller models,and the centrifugal pump performance was obtained by numerical simulation using Fluent software.By taking the blade loading parameters as the optimization object and the hydraulic efficiency of the centrifugal pump design operating point as the optimization target,the relationship between the blade loading parameters and hydraulic efficiency was established using the Kriging surrogate model.Under the condition that the head met the design requirements,the MIGA algorithm was used to obtain the load parameters of the centrifugal pump with the highest hydraulic efficiency.The results show that in the loading curve,the parameters that have a greater influence on the efficiency are the two intersection points ND_(h)and NC h of the straight line and the parabola in the hub,and the intersection point NC_(s)of the straight line and parabola in the shroud.The parameters with less influence are the leading edge loading LE_(h)in the hub and the intersection point ND_(s)of the straight line and the parabola in the shroud.The hydraulic efficiency of the optimized centrifugal pump is increased by 1.35%at the design working point and the efficiency zone is wider.The minimum pressure on the surface of the blades is increased by 38.41%and the cavitation performance is improved.In addition,the power is reduced by 2.46%and the head is slightly improved.The study results provide a useful reference for the efficient design of impeller blades of centrifugal pumps.

关 键 词：离心泵 叶片优化 三元反问题设计 KRIGING模型 MIGA算法 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]