基于分离涡模拟的核主泵水力性能非定常特性分析  

Unsteady analysis of hydraulic performance of reactor coolant pump based on detached eddy simulation

作　　者：王秀勇[1,2] 杜永峰 汪东山 吕雪 黎义斌[1] WANG Xiu-yong;DU Yong-feng;WANG Dong-shan;LÜXue;LI Yi-bin(College of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou Univ. of Tech., Lanzhou 730050, 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]兰州理工大学甘肃省流体机械及系统重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2021年第4期52-58,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51866009)。

摘　　要：为了研究核主泵在设计工况下水力性能的非定常变化特征,基于DDES湍流模型,对某型号核主泵进行全流场非定常数值计算,并结合Q准则捕捉的旋涡结构进行非定常特性分析.结果表明:在一个旋转周期内,受动静干涉作用,泵的瞬态外特性整体上具有不规律的周期性变化特征;叶轮与导叶流道内的旋涡结构会呈现出周期性分裂、融合的非定常现象,而压水室内旋涡结构则是发展与扩散的变化过程;导叶入口处不同时刻涡结构的变化会造成其不同程度的阻塞,从而引起出口压力的波动,造成泵的水力性能出现脉动效应,加剧泵的振动.In order to study the unsteady characteristics of hydraulic performance of reactor coolant pump under design conditions,based on the DDES(delay detached eddy simulation)turbulence model,the unsteady flow field of a reactor coolant pump was calculated,and the vortex structure captured by Q criterion was analyzed.The results show that,in a rotating period,the transient external characteristics of the pump have irregular periodic characteristics under the action of static and dynamic interference.The vortex structure in the passage of impeller and guide vane presents the unsteady phenomenon of periodic splitting and fusion,while the vortex structure in the pressurized water chamber is the change process of development and diffusion.The change of the vortex structure at the inlet of the guide vane will cause different degrees of blockage,thus,the fluctuation of the outlet pressure causes the pulsation effect of the hydraulic performance of the pump and intensifies the vibration of the pump.

关 键 词：核主泵 非定常 水力性能 Q准则 旋涡运动 

分 类 号：TH311[机械工程—机械制造及自动化]