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

Journal of Lanzhou University of Technology ›› 2021, Vol. 47 ›› Issue (4): 52-58.

• Mechanical Engineering and Power Engineering • Previous Articles Next Articles

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

WANG Xiu-yong^1,2, DU Yong-feng¹, WANG Dong-shan¹, LÜ Xue¹, LI Yi-bin^1,2

1. College of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2020-08-25 Online:2021-08-01 Published:2021-09-07

Abstract

Abstract: 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.

Key words: reactor coolant pump, unsteady, hydraulic performance, Q criterion, vortex motion

CLC Number:

TH311

WANG Xiu-yong, DU Yong-feng, WANG Dong-shan, LÜ Xue, LI Yi-bin. Unsteady analysis of hydraulic performance of reactor coolant pump based on detached eddy simulation[J]. Journal of Lanzhou University of Technology, 2021, 47(4): 52-58.

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

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