Experimental and CFD Investigation on Flow Behaviors of a NPP Pump under Natural Circulation Condition
Joint Authors
Li, Weitong
Yu, Lei
Li, Mingrui
Hao, Jianli
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-10-22
Country of Publication
Egypt
No. of Pages
10
Abstract EN
Passive safety system is the core feature of advanced nuclear power plant (NPP).
It is a research hotspot to fulfill the function of passive safety system by improving the NPP natural circulation capacity.
Considering that the flow behaviors of stopped pump pose a significant effect on natural circulation, both experimental and computational fluid dynamics (CFD) methods were performed to investigate the flow behaviors of a NPP centrifugal pump under natural circulation condition with a low flow rate.
Since the pump structure may lead to different flows depending on the flow direction, an experimental loop was set up to measure the pressure drop and loss coefficient of the stopped pump for different flow directions.
The experimental results show that the pressure drop of reverse direction is significantly greater than that of forward direction in same Reynolds number.
In addition, the loss coefficient changes slightly while the Reynolds number is greater than 8 × 104; however, the coefficients show rapid increase with the decrease in Reynolds number under lower Reynolds number condition.
According to the experimental data, an empirical correlation of the pump loss coefficient is obtained.
A CFD analysis was also performed to simulate the experiment.
The simulation provides a good accuracy with the experimental results.
Furthermore, the internal flow field distributions are obtained.
It is observed that the interface regions of main components in pump contribute to the most pressure losses.
Significant differences are also observed in the flow field between forward and reverse condition.
It is noted that the local flows vary with different Reynolds numbers.
The study shows that the experimental and CFD methods are beneficial to enhance the understanding of pump internal flow behaviors.
American Psychological Association (APA)
Li, Weitong& Yu, Lei& Hao, Jianli& Li, Mingrui. 2019. Experimental and CFD Investigation on Flow Behaviors of a NPP Pump under Natural Circulation Condition. Science and Technology of Nuclear Installations،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1210846
Modern Language Association (MLA)
Li, Weitong…[et al.]. Experimental and CFD Investigation on Flow Behaviors of a NPP Pump under Natural Circulation Condition. Science and Technology of Nuclear Installations No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1210846
American Medical Association (AMA)
Li, Weitong& Yu, Lei& Hao, Jianli& Li, Mingrui. Experimental and CFD Investigation on Flow Behaviors of a NPP Pump under Natural Circulation Condition. Science and Technology of Nuclear Installations. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1210846
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1210846