.png){kind=icon}
.png){kind=icon}
Return
Study on hydraulic excitation characteristics of vapor-liquid two-phase flow and safe operating range of axial flow reactor coolant pump under LOCA condition
.png){kind=icon}
PRE
AI
Y
M
Q
Y
S
DOI：10.1016/j.pnucene.2026.106494.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
In loss-of-coolant accident(LOCA), the axial flow reactor coolant pump is likely to be in a vapor-liquid two-phase flow at low flow rates, which poses a threat to the safe operation of the reactors.Based on this special working condition, this paper studies the influence of vapor fraction on the flow patterns of axial flow reactor coolant pump(RCP) at low flow rates, and uses wavelet analysis and other methods to reveal the pressure pulsation characteristics in RCP with different vapor fractions.The results show that the performance of the RCP and the change in the flow pattern in the RCP are closely related to the vapor fraction.As the vapor fraction increases, the performance of the pump near the rated point shows a downward trend, and the hump range in the low flow rate area shows a downward trend first and rising trend.In the impeller, the flow channel is mainly blocked in the form of a vortex under pure liquid and low vapor fraction conditions, and the flow channel is mainly blocked in the form of a backflow under high vapor fraction conditions.In addition, the pressure pulsation amplitude and high pressure pulsation areas of each flow-passing components change with the different vapor fractions, but the main frequency is almost independent of the vapor fraction.
Journal
IF:
3.2
Papers:
5.5K
Citations:
10.0K
Organization
Cited Papers