복합 부수로의 비정상 유동이 유발하는 난류열전달 증진에 대한 LES 해석Large Eddy Simulation of Heat Transfer Performance Enhancement due to Unsteady Flow in Compound Channels
- Other Titles
- Large Eddy Simulation of Heat Transfer Performance Enhancement due to Unsteady Flow in Compound Channels
- Authors
- 홍성호; 신종근; 최영돈
- Issue Date
- 2011
- Publisher
- 대한설비공학회
- Keywords
- Gap(간극); Compound channels(복합부수로); Turbulent flow(난류유동); Large eddy simulation(대형와 수치모사); Heat transfer(열전달); Flow pulsation(맥동유동); Unsteady flow(비정상유동); Turbulent model(난류모형)
- Citation
- 설비공학 논문집, v.23, no.2, pp.132 - 138
- Indexed
- KCI
- Journal Title
- 설비공학 논문집
- Volume
- 23
- Number
- 2
- Start Page
- 132
- End Page
- 138
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/114023
- ISSN
- 1229-6422
- Abstract
- In the present article, we investigate numerically turbulent flow of air through compound rectangular channels. Large eddy simulation(LES) is employed for unsteady turbulence modeling. LES gives better predictions for the axial mean velocity distribution than those of other turbulent models. Strong large-scale quasi-periodic flow oscillations are observed in most of the geometries investigated. Such large-scale flow oscillations in compound rectangular channels are similar to the quasi-periodic flow pulsation through the gaps between fuel rod bundle in nuclear reactor. It exists in any longitudinal connecting gap between two flow channels. The frequency of this flow oscillation is determined by the geometry of the gap. The large scale cross motions through the rectangular compound channels induce significant heat transfer enhancement of the compound channel flow.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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