|
|
|
| Influence of start-up acceleration on internal flow in impeller of nuclear reactor coolant pump |
| ZHONG Huazhou, ZHU Rongsheng, WANG Xiuli, ZHANG Benying, LU Yonggang |
| National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
|
|
|
|
Abstract In order to investigate the influence of different start-up accelerations on the internal flow of the nuclear reactor coolant pump during the start-up period, the experimental data of different transient acceleration external performances were regarded as the basis in this paper, wherein the variations of the flow rate and rotating speed with time were obtained. The obtained characteristic curves were used as boundary conditions into CFX for numerical simulation, besides, the pressure contour and the strea-mline gradient contour were analyzed during the start-up period. The results show that the start-up acceleration is directly related to the start-up time, but is independent of the time difference between the flow rate and the rotating speed reaching the steady value;the start-up acceleration has great influence on the flow stability and pressure amplitude of the impeller. In the start-up transition process, the bigger start-up acceleration corresponding to the inner flow of the impeller is very unstable, producing the vortex area with a certain intensity and area, and pressure fluctuation is large,while the smaller start-up acceleration corresponding to the internal flow of the impeller is stable, the pressure changes in uniform amplitude.The conclusion obtained in this paper is of great importance for the instability control of the nuclear reactor coolant pump in the start-up transition process.
|
|
Received: 05 August 2016
|
|
|
|
| [1]博金海,姜胜耀,姚梅生,等.上空腔小破口失水事故模拟实验[J].核动力工程,1990(5):57-60. BO Jinhai, JIANG Shengyao,YAO Meisheng,et al. Simulation experiment of small break lock in upper plenum[J].Nuclear power engineering,1990(5):57-60.(in Chinese).[2]CHALGHOUM, ELAOUDS, M AKROUT,et al.Tran-sient behavior of a centrifugal pump during starting pe-riod [J]. Applied acoustics, 2016, 109(8):82-89.[3]ELAOUD S, EZZEDDIN E. Influence of pump starting times on transient flows in pipes [J].Nuclear enginee-ring and design, 2011,241(9): 3624-3631.[4]LI Zhifeng, WU Dazhuan, WANG Leqin, et al. Nume-rical simulation of the transient flow in a centrifugal pump during starting period [J]. Journal of fluids engineering, 2010,132(8): 1-8.[5]李志峰,王乐勤,戴维平,等.离心泵启动过程的涡动力学诊断[J].工程热物理学报,2010(1):48-51. LI Zhifeng, WANG Leqin,DAI Weiping, et al.Diagnostics of a centrifugal pump during starting period based on vorticity dynamics[J].Journal of engineering thermophysics, 2010(1):48-51.(in Chinese)[6]吴大转,许斌杰,李志峰,等.离心泵瞬态操作条件下内部流动的数值模拟[J].工程热物理学报,2009,30(5):781-783. WU Dazhuan,XU Binjie, LI Zhifeng, et al.Numerical simulation on internal flow of centrifugal pump during transient operation[J].Journal of engineering thermophysics,2009, 30(5): 781-783.(in Chinese)[7]杨从新,王斌.离心泵在启动阶段的瞬态三维数值模拟[J].排灌机械工程学报,2010,28(2):122-126. YANG Congxin,WANG Bin.3-D Numerical simulation on transient characteristics centrifugal pump during star-ting period [J].Journal of drainage and irrigation machinery engineering,2010,28(2):122-126.(in Chinese)[8]李伟,季磊磊,施卫东,等.基于准稳态假设的混流泵启动特性分析[J].农业工程学报,2016,32(7):86-92. LI Wei, JI Leilei, SHI Weidong,et al.Starting characteristic of mixed-flow pump based on quasi-steady state assumption [J].Transactions of the CSAE,2016,32(7):86-92.(in Chinese)[9]ZHU Zuchao, GUO Xiaomei, CUI Baoling, et al. External characteristics and internal flow features of a centrifugal pump during rapid startup period [J]. Chinese journal of mechanical engineering, 2011, 24(5): 798-804.[10]汤跃,成军,汤玲迪,等.不同转动惯量叶轮对泵开机瞬态特性的影响[J].流体机械,2013,41(8):6-11. TANG Yue,CHENG Jun,TANG Lingdi,et al.Analysis on the influence of the pump starting transient perfor-mance with difference inertia impeller[J].Fluid machi-nery,2013,41(8):6-11.(in Chinese)[11]潘中永,李俊杰,李晓俊,等.斜流泵不稳定特性及旋转失速研究[J].农业机械学报,2012,43(5):64-68. PAN Zhongyong,LI Junjie,LI Xiaojun,et al. Perfor-mance curve instability and rotating stall[J].Transactions of the CSAM,2012, 43(5):64-68.(in Chinese)[12]黎义斌,李仁年,王秀勇,等.混流泵内部流动不稳定特性的数值模拟[J].排灌机械工程学报,2013,31(5):384-389. LI Yibin,LI Rennian,WANG Xiuyong,et al.Numerical simulation of unstable characteristics in head curve of mixed-flow pump[J]. Journal of drainage and irrigation machinery engineering,2013,31(5):384-389.(in Chinese)[13]王秀礼,袁寿其,朱荣生,等. 核主泵停机过渡过程瞬态水动力特性研究[J]. 原子能科学技术,2013,47(3):364-370. WANG Xiuli,YUAN Shouqi,ZHU Rongsheng,et al.Transient hydraulic characteristic study on nuclear reactor coolant pump during stopping period[J].Atomic energy science and technology,2013,47(3):364-370.(in Chinese)[14]王秀礼,袁寿其,朱荣生,等.核主泵变流量过渡过程瞬态水力特性研究[J].原子能科学技术,2013,47(7):1169-1174. WANG Xiuli,YUAN Shouqi,ZHU Rongsheng,et al.Transient hydraulic characteristic study on nuclear reactor coolant pump in variable flow transient process[J].Atomic energy science and technology,2013,47(7):1169-1174.(in Chinese) |
|
|
|
