并联立式屏蔽电机主泵流动特性数值研究

周兴柱; 宋煜; 尹俊连; 王德忠; 夏栓; 冯磊

doi:10.13832/j.jnpe.2022.02.0212

并联立式屏蔽电机主泵流动特性数值研究

doi: 10.13832/j.jnpe.2022.02.0212

周兴柱^1,,
宋煜¹,
尹俊连^1, ,,
王德忠¹,
夏栓²,
冯磊²

1.
上海交通大学机械与动力工程学院，上海，200240
2.
上海核工程研究设计院，上海，200233

基金项目: 大型先进压水堆及高温气冷堆核电站（2018ZX06002010）

详细信息

作者简介:
周兴柱（1997—），男，硕士研究生，主要从事核主泵惰转研究，E-mail: 1019397506@qq.com

通讯作者:
尹俊连，E-mail: jlyin@sjtu.edu.cn

中图分类号: TL353⁺. 2
计量
- 文章访问数: 259
- HTML全文浏览量: 61
- PDF下载量: 72
- 被引次数: 0
出版历程
- 收稿日期: 2021-03-15
- 录用日期: 2021-08-26
- 修回日期: 2021-08-26
- 刊出日期: 2022-04-02

Numerical Study on the Flow Characteristics of the Parallel Main Pumps of the Vertical Canned Motor

1.
School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai, 200240, China
2.
Shanghai Nuclear Engineering Research and Design Institute, Shanghai, 200233, China

摘要

摘要: 以缩比系数为1∶4的立式屏蔽电机反应堆主冷却剂循环泵（简称主泵）为研究对象，建立2台并联主泵反向旋转（模型1）和同向旋转（模型2）2种几何模型；运用计算流体力学（CFD）方法对2种模型的并联主泵内部流场进行稳态运行计算，从主泵的外特性、进口流动特性、入流品质、管内压力分布方面对模型1和模型2进行对比分析。结果表明，模型1中A、B主泵性能基本一致；模型2中A、B主泵的流量相对偏差基本在0.8%以内，最大值达到1.69%，扬程相对偏差稳定在1%以内，效率和轴功率相对偏差最大值分别达到6%和8%；模型2相对模型1流动稳定性更好、入流品质更高、管内压力分布较低，有利于设备的长期运行。
- 立式屏蔽电机主泵 /
- 计算流体力学（CFD） /
- 并联主泵 /
- 流场分布
Abstract: Taking the reactor main coolant circulation pump (referred to as the main pump) of the vertical canned motor with a scale factor of 1:4 as the research object, two kinds of geometric models with two counter-rotating parallel main pumps (model 1) and two co-rotating parallel main pumps (model 2) are established. Using computational fluid dynamics (CFD) method to calculate the steady-state operation of the internal flow field of the two models of parallel main pumps, from the external characteristics of the main pumps, the inlet flow characteristics, the inflow quality, and the pressure distribution in the pipe, the comparative analysis of model 1 and model 2 is conducted. The results show that the performance of the main pumps A and B in model 1 are basically the same; the relative deviation of the flow rate of the main pumps A and B in model 2 is basically within 0.8%, the maximum value reaches 1.69%, the relative deviation of head is stable within 1%; the maximum relative deviation of the efficiency and shaft power reaches 6% and 8% respectively; compared with model 1, model 2 has better flow stability, higher inflow quality, and lower pressure distribution in the pipe, which is conducive to the long-term operation of the equipment.
- Main pump of the vertical canned motor /
- Computational fluid dynamics (CFD) /
- Parallel main pump /
- Flow field distribution

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图 1 立式屏蔽电机主泵几何模型

Figure 1. Geometric Model of the Main Pump of the Vertical Canned Motor

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图 2 主泵叶轮旋向计算模型

Figure 2. Calculating Model of Rotation Direction of Main Pump Impeller

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图 3 网格划分

Figure 3. Mesh Generation

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图 4 5套网格数下的主泵扬程

Figure 4. Main Pump Head under 5 Grid Numbers

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图 5 A、B主泵进口管截面和曲线定义

Figure 5. Inlet Pipe Section and Curve Definition of Main Pumps A and B　　　　　　　

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图 6 2种模型的A、B主泵外特性

Q—流量, kg/s；H_d—主泵的额定扬程，m；η—效率；P—轴功率，kW　　　　　

Figure 6. External Characteristics of Main Pumps A and B of Two Models

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图 7 2种模型的A、B主泵外特性相对偏差

Figure 7. Relative Deviation of External Characteristics of Main Pumps A and B of Two Models

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图 8 系统层面2种模型的A、B主泵外特性相对偏差

Figure 8. Relative Deviation of External Characteristics of Main Pumps A and B of Two Models at the System Level

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图 9 Ψ=2.0时A、B主泵进口管截面归一化Q准则

Figure 9. Normalized Q Criterion for the Inlet Pipe Section of Main Pumps A and B when Ψ=2.0

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图 10 A、B主泵进口管入流面速度矢量

Figure 10. Inlet Velocity Vector of Inlet Pipe of Main Pumps A and B

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图 11 2种模型的速度不均匀度

Figure 11. Speed Unevenness of the Two Models

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图 12 2种模型的入流角

Figure 12. Inflow Angles of the Two Models

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图 13 沿进口管曲线压力系数

Figure 13. Pressure Coefficient along the Inlet Pipe Curve

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表 1 网格信息表

Table 1. Grid Information Table

结构名称网格数节点数

蒸气发生器 1839950 1796088
叶轮 3007228 2868530
导叶 2051784 1946106
蜗壳 1891874 1834071
合计 8790836 8444795

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