CFD를 이용한 나선형 튜브 열교환기에서 강제대류의 열유동특성에 관한 연구A Study on Heat Flow Characteristics of Forced Convection in a Helical Tube Heat Exchanger using CFD
- Other Titles
- A Study on Heat Flow Characteristics of Forced Convection in a Helical Tube Heat Exchanger using CFD
- Authors
- 이원재; 김진황; 윤준규
- Issue Date
- 2018
- Publisher
- 한국기계기술학회
- Keywords
- Helical Tube Heat Exchanger(나선형 튜브 열교환기); Forced Convection(강제대류); Heat Flow(열유동); Secondary flow(2차유동); CFD(전산유체역학); RSM(레이놀즈응력모델)
- Citation
- 한국기계기술학회지, v.20, no.2, pp.166 - 173
- Journal Title
- 한국기계기술학회지
- Volume
- 20
- Number
- 2
- Start Page
- 166
- End Page
- 173
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/5086
- DOI
- 10.17958/ksmt.20.2.201804.166
- ISSN
- 1229-604X
- Abstract
- In this study, the CFD analysis was performed by changing the geometry of coil-tube diameter ratio, coil winding number, coil pitch, and cross section of the tube to investigate the heat flow characteristics of forced convection in a helical coil-tube heat exchanger using RSM (Reynolds Stress Model). As a result, thesecondary flow was developed in the tube caused by the influence of centrifugal force. It improved the heat transfer on the outer side of the tube, but on the inner side was not performed well. And the temperature rose locally in the tube region. Also the pressure drop in the tube was proportional to the diameter ratio of the coil-tube and the inlet velocity, and it was found that pressure drop and friction factor were inversely proportional. When the coil winding number and coil pitch were increased, it affected heat transfer in the low speed range of 0.1 ~ 0.2 m/s, but did not affect the flow condition after this range.
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Collections - 공과대학 > 기계공학과 > 1. Journal Articles
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