摘要
作为核能创新技术,高温熔盐屏蔽泵(简称熔盐屏蔽泵)可用于第四代熔盐反应堆,通过水力优化设计提升泵的水力性能对第四代核电技术的发展有重要意义。本文利用ANSYS CFX软件对熔盐屏蔽泵进行数值模拟,基于响应面法(Response Surface Methodology,RSM)建立了显著参数与优化目标之间的近似模型,以效率和扬程为优化目标,通过第二代非支配排序遗传算法(Non-dominated Sorting Genetic AlgorithmⅡ,NSGA-Ⅱ)分别对熔盐屏蔽泵开展熔盐和水工质下的水力优化设计。结果表明:相比于水工质,熔盐工质下泵的优化空间更大;两种工质下的优化模型效率相同时,熔盐优化模型叶轮进口直径和叶片出口安放角较小,叶轮出口宽度和导叶喉部平面宽度较大;与初始模型相比,熔盐优化模型效率提高了1.26%,扬程提高了1.40%,水优化模型效率提高了0.92%,扬程降低了0.64%。研究成果可用于指导熔盐屏蔽泵的水力结构设计。
[Background]As an innovative technology of nuclear power,magnetically suspended high-temperature molten salt canned motor pump(referred to as molten salt canned motor pump)can be used in the fourth generation molten salt reactor(MSR).Improving pump performance via hydraulic optimization design is significant to fourthgeneration nuclear power technology.[Purpose]This study aims to investigate the influence of different working fluids on the hydraulic optimization design of magnetically suspended high-temperature molten salt-canned motor pumps and provide suggestions for the optimal design of magnetically suspended high-temperature molten saltcanned motor pumps.[Methods]Firstly,ANSYS CFX software was employed to perform a numerical simulation of a magnetically suspended high-temperature molten salt canned motor pump.Based on response surface methodology(RSM),approximate models between significant parameters and optimization objectives were established.Then,taking the efficiency and head as optimization objectives,a non-dominated sorting genetic algorithm II(NSGA-II)was used to design the magnetically suspended high-temperature molten salt canned motor pump under molten salt and water.[Results]Compared with water working fluid,the optimization space of the pump under molten salt working fluid is larger.When the efficiency of the optimization model under the two working fluids is the same,the impeller inlet diameter and the blade outlet placement angle of the molten salt optimization model are reduced,whereas the impeller outlet width and the diffuser throat plane width are increased.The efficiency of the finally determined molten salt optimization model is increased by 0.75%and the head is raised by 0.0782 m whilst the efficiency of the water optimization model is increased by 0.55%,and the head is reduced by 0.0359 m.[Conclusions]The research results of this study can be used to guide the hydraulic structure design of a magnetically suspended high-temperature molten salt-canned motor pump.
作者
董廷静
樊辉青
邹杨
徐洪杰
DONG Tingjing;FAN Huiqing;ZOU Yang;XU Hongjie(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《核技术》
CAS
CSCD
北大核心
2023年第6期102-112,共11页
Nuclear Techniques
基金
国家重点研发计划(No.2020YFB1902000)
中国科学院战略性先导专项(No.XDA02010200,No.XDA22010501)
上海市基础研究特区计划(No.JCYJ-SHFY-2021-003)资助。
关键词
高温熔盐屏蔽泵
数值模拟
多目标优化
响应面法
NSGA-Ⅱ
High-temperature molten salt-canned motor pump
Numerical simulation
Multi-objective optimization
Response surface methodology
NSGA-Ⅱ
