BROWSE

Related Researcher

Author's Photo

Bang, In Cheol
Nuclear Thermal-Hydraulics & Reactor Safety Lab
Research Interests
  • Nuclear Thermal-Hydraulics
  • Nuclear Safety
  • Nuclear System Design & Analysis
  • Nanofluids
  • Critical Heat Flux

ITEM VIEW & DOWNLOAD

Study on the effects of flow-driven rotational mixing vanes by flow pattern tracking

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Study on the effects of flow-driven rotational mixing vanes by flow pattern tracking
Author
Park, HaneolKim, In GukLee, Min HoJeong, Yeong ShinBang, In Cheol
Issue Date
2020-08
Publisher
ELSEVIER SCIENCE SA
Citation
NUCLEAR ENGINEERING AND DESIGN, v.365, pp.110661
Abstract
In pressurized water reactor (PWR), spacer grid is installed to support the fuel rod bundles, located between the fuel rod bundles. The mixing vane is installed on top of the spacer grid to generate swirl and cross flow. The swirl and cross flow enhance the heat transfer and can promote a critical heat flux (CHF) in the PWR. The PWR safety margin can be estimated using the heat-transfer performance and the CHF. In this research, flow-driven rotational mixing vanes were installed. Fan, impeller, and wind-turbine mixing vanes were adopted, which could rotate without any artificial force. The fluid flow and rotational motion simultaneously influenced each other. The effects of the flow-driven rotational mixing vanes were presented as flow patterns. A flow-pattern tracking method demonstrated the effects of various mixing parameters. The rotational speed was validated using a high-speed camera experiment and a computational analysis using a general moving-object method. The lateral velocity reflected the cross-flow magnitude with respect to the axial velocity. The vorticity was considered as a performance measure for the rotational mixing vanes. The bubble behavior demonstrated the mixing effect of the fluid in the subchannel. The pressure drop was gauged to verify the flow blockage. Thus, using flow-pattern tracking, the mixing effect of the parameters can be used to quantify the power-uprate enhancement and the safety margin for a PWR.
URI
https://scholarworks.unist.ac.kr/handle/201301/47564
URL
https://www.sciencedirect.com/science/article/pii/S0029549320301552?via%3Dihub
DOI
10.1016/j.nucengdes.2020.110661
ISSN
0029-5493
Appears in Collections:
NUE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU