180° 원형 혼합배관에서 위치별 속도분포 및 출구직관거리의 균일도 특성에 관한 연구A Characteristic Study on Velocity Distribution by Location and Uniformity Index according to Exit Straight Length in a 180° Circular Mixed Pipe
- Other Titles
- A Characteristic Study on Velocity Distribution by Location and Uniformity Index according to Exit Straight Length in a 180° Circular Mixed Pipe
- Authors
- 이형민; 김광추; 임종한; 윤준규
- Issue Date
- 2019
- Publisher
- 한국기계기술학회
- Keywords
- Circular mixed pipe(원형 혼합배관); Velocity distribution(속도분포); Working fluid(작동유체); Exit straight length(출구직관거리); Uniformity index(균일도)
- Citation
- 한국기계기술학회지, v.21, no.2, pp.213 - 220
- Journal Title
- 한국기계기술학회지
- Volume
- 21
- Number
- 2
- Start Page
- 213
- End Page
- 220
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/2555
- DOI
- 10.17958/ksmt.21.2.201904.213
- ISSN
- 1229-604X
- Abstract
- In this study, velocity distribution characteristics by location and uniformity according to exit straight length in a 180° mixed pipes were numerically analyzed using RSM (Reynolds Stress Model) turbulent model by changing various flow parameters such as working fluids, inlet air velocity etc. As a result of it, the working fluids characteristics was highly indicated by the viscous force difference, the maximum velocity points according to main pipe’s inlet velocity were indicated when 90° sectional location was distributed at X/D=0.5~0.6 region and 180° sectional location was distributed at Y/D=0.5 region. And the flow characteristics according to branch pipe’s inlet velocity when 90° sectional location was distributed at X/D=0.4~0.6 region and 180° sectional location was distributed at Y/D=0.5 region. Based on the results that the most stable exit straight length in flow uniformity was indicated at L/D=25~30 region, 40D is suggested as the effective measurement distance in the straight pipe downstream curved pipe of mixed pipe.
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