All Issue

2018 Vol.51, Issue 11 Preview Page

Research Article

Two-dimensional unsteady flow analysis with a five region turbulence models for a simple pipeline system

단순한 관망체계에서 5영역 난류 모형을 이용한 2차원 부정류 흐름 해석 연구

Hyun Jun Kima
,
Sangh Hyun Kima*
,
Da Won Baeka
김 현준a
,
김 상현a*
,
백 다원a
aDepartment of Civil Engineering, Pusan National University
a부산대학교 공과대학 환경공학과
* Corresponding Author
30 November 2018. pp. 971-976
PDF XML Citation
Abstract

An accurate analysis of pipeline transient is important for proper management and operation of a water distribution systems. The computational accuracy and its cost are two distinct components for unsteady flow analysis model, which can be strength and weakness of three-dimensional model and one-dimensional model, respectively. In this study, we used two-dimensional unsteady flow model with Five-Region Turbulence model (FRTM) with the implementation of interaction between liquid and air Since FRTM has an empirical component to be determined, we explored the response feature of two-dimensional flow model. The relationship between friction behaviour and the variation of undetermined parameter was configured through the comparison between numerical simulations and experimental results.

Keywords
Pipeline analysis
Two-dimensional flow analysis
Turbulence model
Velocity profile
Waterhammer

관망의 해석은 관망의 설치, 운영에서 매우 중요한 요소이다. 이를 위한 연구 방법은 1차원 모형과 3차원 모형이 있으나 각각은 정확도와 계산속도의 면에서 관망 해석에 장점과 한계점을 보인다. 2차원 모형의 경우 1차원 모형과 달리 난류 점성을 이용하여 보다 정확한 마찰을 모의할 수 있게 하는데, 이때 사용되는 난류 점성을 모의하는 모형은 Five-Region Turbulence Model을 이용하였다. 그러나 이들 모형에 사용되는 매개 변수들은 실험에 의한 값이기 때문에 이러한 매개변수에 따른 2차원 부정류 해석 방법의 응답 특성을 알아보았다. 이를 위해 실제 상수관망에서의 수격압 데이터와 부정류 해석 모형으로 부터의 수격압 데이터를 비교하고, 다양한 매개변수에 따른 속도 분포 모의 특성을 조사하였다. 이를 통해서, 난류 해석 모형의 마찰 거동과 매개변수와의 관계를 규명하였다.

키워드
관망해석
2차원 부정류 해석
난류 모형
속도 분포
수격압
References
1
Brunone, B., Golia, U. M., and Greco, M. (1991). "Some Remarks on the Momentum Equations for Fast Transients" Proc. Int. Meeting on Hydraulic Transients with Column Separation, 9th Round Table, IAHR, Valencia, Spain, pp. 201-209.
2
Chaudhry, M. H. (1987). Applied Hydraulic Transients. Van Nostrand Reinhold, New York. ISBN: 978-0-44-221514-9
PMC1261741
3
Ghidaoui, M. S., Zhao, M., McInnis, D. A., and Axworthy, D. H. (2015). "A Review of Water Hammer Theory and Practice." Applied Mechanics Reviews, Vol. 58, No. 1, pp. 49-76.
10.1115/1.1828050
4
Kim, H. J., and Kim, S. H. (2018). "Two dimensional cavitation waterhammer model for a reservoir-pipeline-valve system." Journal of Hydraulic Research, In press.
10.1080/00221686.2018.1494046
5
Naser, G. (2006). Water Quality Transformations in Pipelines : A Two-Dimensional Multi-Component Simulation Model. Ph. D. disseratation, University of Toronto, Toronto, Canada.
PMC1347307
6
Vardy, A. E., Hwang, K. L., and Brown, J. M. (1993). "A Weighting Function Model of Transient Turbulent Pipe Friction." Journal of Hydraulic Research, Vol. 31, No. 4, pp. 533-548.
10.1080/00221689309498876
7
Vardy, A. E., and Hwang, K. L. (1991). "A Characteristic Model of Transient Friction in Pipes." Journal of Hydraulic Research, Vol. 29, No. 5, pp. 669-685.
10.1080/00221689109498983
8
Wylie, E. B., Streeter, V. L., and Suo, L. (1993). Fluid transients in systems, Prentice Hall, New York. ISBN: 978-0-13-934423-7
9
Zhao, M., and Ghidaoui, M.S. (2003), "An Efficient Solution for Quasi-Two-Dimensional Water Hammer Problems." Journal of Hydraulic Engineering, Vol. 129, No. 12, pp. 1007-1013.
10.1061/(ASCE)0733-9429(2003)129:12(1007)
10
Zielke, W. (1968). "Frequency Dependent Friction in Transient Pipe Flow." Journal of Basic Engineering, Trans. ASME, Vol. 90, No. 1, pp. 109-115.
10.1115/1.3605049
Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 51
  • No :11
  • Pages :971-976
  • Received Date : 2018-08-09
  • Revised Date : 2018-09-11
  • Accepted Date : 2018-09-11
  • DOI :https://doi.org/10.3741/JKWRA.2018.51.11.971
Journal Informaiton Journal of Korea Water Resources Association Journal of Korea Water Resources Association
Online Submission
Archives
  • scopus
  • KCI-수자원
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close