Browse > Article
http://dx.doi.org/10.9798/KOSHAM.2011.11.3.143

Estimation of Head Loss Coefficients at Surcharged Square Manhole Using Numerical Model  

Kim, Jung-Soo (부천대학 토목과)
Lim, Ga-Hui (경기대학교 토목공학과)
Rim, Chang-Soo (경기대학교 토목공학과)
Yoon, Sei-Eui (경기대학교 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.11, no.3, 2011 , pp. 143-150 More about this Journal
Abstract
Energy loss at manholes, often exceeding friction loss of pipes under surcharged flow, is considered as one of the major causes of inundation in urban area. Therefore, it is important to analyze the head losses at manholes, especially in case of surcharged flow. The stream characteristics were analyzed and head loss coefficients were estimated by using the computational fluid dynamics(CFD) model, FLUENT 6.3, at surcharged square manhole in this study. The CFD model was carefully assessed by comparing simulated results with the experimental ones. The study results indicate that there was good agreement between simulation model and experiment. The CFD model was proved to be capable of estimating the head loss coefficients at surcharged manholes. The head loss coefficients with variation of the ratio of manhole width(B) to inflow pipe diameter(d) and variation of the drop height at surcharged square manhole with a straight-path through were calculated using FLUENT 6.3. As the ratio of B/d increases, head loss coefficient increases. The depth and head loss coefficient at manhole were gradually increased when the drop height was more than 5cm. Therefore, the CFD model(Fluent 6.3) might be used as a tool to simulate the water depth, energy losses, and velocity distribution at surcharged square manhole.
Keywords
Head loss coefficient; Surcharged manhole; CFD model; Sewer system;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 김영한, 오정선, 서일원 (2003) 수치모형을 이용한 댐 상류 및 여수로 수리현상 해석, 한국수자원학회 논문집, 제36권, 제5호, pp. 761-776.
2 김정수, 송주일, 장석진, 윤세의 (2008) 과부하 원형맨홀에서의 손실계수 산정을 위한 실험적 연구, 한국수자원학회 논문집, 제41권, 제3호, pp. 305-314.
3 김정수, 김형민, 윤세의, 이종태 (2009) 합류맨홀에서 FLUENT 모형의 적용성분석, 대한토목학회 학술발표회 논문집, pp. 2651-2654.
4 김정수, 최현수, 윤세의 (2010a) 과부하 합류맨홀에서의 손실계수 산정을 위한 실험적 연구, 한국수자원학회 논문집, 제43권, 제5호, pp. 445-453.
5 김정수, 최현수, 김형민, 윤세의 (2010b) FLUENT 모형을 이용한 합류 맨홀에서의 흐름특성 분석, 한국수자원학회 학술발표회 논문집, pp. 649-653.
6 환경부(2005) 하수도시설기준.
7 Chanwit, S. and Ian, G. (2005) Simulation of Energy Loss due to Changes in Pipe Direction Across a Manhole. 10th National Convention on Civil Engineering, Thailand, 2. pp. 5-9.
8 Fluent Inc. (2005) Fluent 6.3 User's Guide. Fluent Inc
9 Marsalek, J. (1984) Head Losses at Sewer Junction Manholes. Journal of Hydraulic Engineering, Vol. 110, No. 8, pp. 1150-1154.   DOI   ScienceOn
10 Johnston, A.J. and Volker, R.E. (1990) Head Losses at Junction Boxes. Journal of Hydraulic Engineering, Vol. 116, No. 3, pp. 326-341.   DOI
11 Pedersen, B. F. and Mark, O. (1990) Head Losses in Storm Sewer Manholes : Submerged Jet Theory. Journal of Hydraulic Engineering, Vol. 116, No. 11, pp. 1317-1328.   DOI
12 Rodi, W. (1993) Turbulence Models and Their Application in Hydraulics, Balkema, Rotterdam, Netherlands.
13 Sangster, W. M., Wood, H. W., Smerden, E. T. and Bossy, H. G. (1958) Pressure Changes at Storm Drain Junctions. Engineering Experiment Station, University of Missouri, Columbia, Bull. No. 41.
14 Zhao, C. H., Zhu, D. Z., and Rajarattnam, N. (2006) Experimental Study of Surcharged Flow at Combining Sewer Junction. Journal of Hydraulic Engineering, Vol. 132, No. 12, pp. 1259-1271.   DOI   ScienceOn