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浙江大学学报(工学版)
浙江大学学报(工学版)  2019, Vol. 53 Issue (11): 2076-2084    DOI: 10.3785/j.issn.1008-973X.2019.11.004
机械工程     
蒸汽发生器致畸变入流对核主泵流动性能的影响
王悦荟1(),刘聪1,王鹏飞2,许忠斌1,*(),阮晓东3,付新3
1. 浙江大学 能源工程学院，化工机械研究所，浙江 杭州 310027
2. 浙江大学城市学院，浙江 杭州 310015
3. 浙江大学 流体动力与机电系统国家重点实验室，浙江 杭州 310027
Influence of distorted inflow caused by steam generator on flow properties of reactor coolant pump
Yue-hui WANG1(),Cong LIU1,Peng-fei WANG2,Zhong-bin XU1,*(),Xiao-dong RUAN3,Xin FU3
1. Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
2. Zhejiang University City College, Hangzhou 310015, China
3. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
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摘要：

为了探究由蒸汽发生器（SG）引起的畸变入流对核主泵（RCP）流动性能的影响，采用计算流体力学方法，建立核主泵与下封头的联合计算模型；利用多参考坐标系模型和滑移交界面技术，开展运行工况下的全三维稳态和瞬态数值模拟；采用入流畸变度和平均偏流角公式定量表征畸变入流的流场速度分布，通过正则化螺旋度法捕捉核主泵叶轮的涡流流动特征. 研究结果表明：与均匀入流相比，畸变入流复杂化了核主泵进口流场，导致核主泵的湍动能和湍耗散增大，降低了主泵的水力效率；在泵的进口流场形成了明显的非对称分布的涡核区域，引起叶轮各流道流态产生差异，造成叶轮内部压力和速度分布不均；导致各流道流量分配不均，加剧叶轮受载波动；降低其运行的稳定性和安全性.
关键词： 核主泵;  蒸汽发生器;  畸变入流;  湍动能;  计算流体力学（CFD）    
Abstract:

A united model for the reactor coolant pump (RCP) and the channel head was generated by using the method of computational fluid dynamic, in order to analyze the influence of the distorted inflow caused by the steam generator (SG) on the flow property of RCP. Three-dimensional steady and transient numerical simulations in normal operating conditions were performed by using multiple frames of reference and sliding interface technology. The velocity distribution of distorted inflow was quantitatively characterized by inflow distortion degree and mean drift angle, and the regularization helicity method was used to capture the flow characteristics of vortex core for the impeller of RCP. Results show that with the comparison of uniform inflow, the inflow field of the RCP is complicated by the distorted inflow, and the turbulent kinetic energy and turbulent eddy dissipation are increased while the hydraulic efficiency of the RCP is decreased. Obvious asymmetric vortex core regions form in the RCP inlet, causing differences between the flow patterns of the impeller flow channels, and then causing the non-uniform distribution of the pressure and velocity within the impeller. Furthermore, due to the distorted inflow, the flow distribution of each flow channel is uneven, increasing the load fluctuation. The distorted inflow has an adverse effect on the RCP, reducing the stability and safety of the operation of RCP.
Key words: reactor coolant pump    steam generator    distorted inflow    turbulent kinetic energy    computational fluid dynamic (CFD)
收稿日期: 2018-09-11 出版日期: 2019-11-21
CLC:  TL 353  
基金资助: 国家“973”重点基础研究发展规划资助项目（2015CB057301）；浙江省自然科学基金资助项目（LQ18E060002）
通讯作者: 许忠斌     E-mail: wangyuehui@zju.edu.cn;xuzhongbin@zju.edu.cn
作者简介: 王悦荟（1992—），女，博士生，从事微流体及流体机械研究. orcid.org/0000-0003-0956-8551. E-mail： wangyuehui@zju.edu.cn
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引用本文:

王悦荟,刘聪,王鹏飞,许忠斌,阮晓东,付新. 蒸汽发生器致畸变入流对核主泵流动性能的影响[J]. 浙江大学学报(工学版), 2019, 53(11): 2076-2084.

Yue-hui WANG,Cong LIU,Peng-fei WANG,Zhong-bin XU,Xiao-dong RUAN,Xin FU. Influence of distorted inflow caused by steam generator on flow properties of reactor coolant pump. Journal of ZheJiang University (Engineering Science), 2019, 53(11): 2076-2084.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2019.11.004    或    http://www.zjujournals.com/eng/CN/Y2019/V53/I11/2076

图 1  核主泵与蒸汽发生器下封头的位置关系图
图 2  下封头与核主泵的联合建模几何模型图
图 3  下封头与核主泵联合模型网格划分图
图 4  下封头与核主泵联合模型的网格无关性验证
设计参数 数值
流量/(m3?h?1) 17 886
扬程/m >111.3
同步转速/(r·min?1) 1 800
设计压力/MPa 17.2
设计温度/K 616
比转速 428
表 1  核主泵叶轮几何参数
图 5  核主泵扬程测试试验台原理图
图 6  核主泵体积流量-扬程的模拟和实验数据对比图
图 7  核主泵入口处不同剖面的位置示意图
图 8  入流畸变度和平均偏流角的变化规律
图 9  均匀入流下核主泵叶轮进口流场的正则化螺旋度分布图
图 10  畸变入流下核主泵叶轮进口流场正则化螺旋度分布图
图 11  核主泵叶轮叶片压力对比图
图 12  核主泵叶轮叶片速度对比图
图 13  核主泵整体流线图
图 14  核主泵叶片与封头位置关系图
图 15  核主泵叶轮各流道体积流量分配图
图 16  核主泵湍耗散对比图
图 17  核主泵湍动能对比图
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