Energy Loss at Combining Pipe Junction

Serre, Marc L.; Odgaard, A. Jacob; Elder, Rex A.

doi:10.1061/(asce)0733-9429(1994)120:7(808)

Cited by 32 publications

(21 citation statements)

References 4 publications

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“…, ; Blaisdell & Manson ; Ito & Imai ; Lindvall , ; Johnston & Volker ; Miller ; Serre et al . ; Ramamurthy & Zhu ). These tests were conducted for different branches and main diameter ratios, and for different pipe alignments.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the effects of combining sewer junction characteristics on the hydraulic parameters of flow in fully surcharged condition

Motlagh

Nazemi

Sadraddini

et al. 2012

Water & Environment J

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In this study, the effects of different parameters on flow structure and flow hydraulics for combining sewer junction consisting of manhole and lateral inflow were investigated numerically. For this purpose, the effects of dimension variations, main and lateral pipe slope, angle and the joint position of lateral pipe beside manhole, manhole geometry, and the outflow rate of manhole on flow structure and energy loss coefficients were investigated. Results show that the rate of energy loss decreases by heightening the installation position of lateral pipe beside manhole. In addition, it was shown that the slope variations of main and lateral pipes and outflow rate do not affect the rate of energy loss.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of the effects of combining sewer junction characteristics on the hydraulic parameters of flow in fully surcharged condition

Motlagh

Nazemi

Sadraddini

et al. 2012

Water & Environment J

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“…In these fields there are many works that focus on the evaluation of pressure losses both with Computational Fluid Dynamic (CFD) analysis and experimental measurements: in [4], where the authors analyze a solar collector, a very good agreement between the two analyses was shown; in [5,6] the authors study the pressure losses in U bends considering the cooling channels geometry of a gas turbine blades, both with numerical analysis and experimental one, with the aim of optimizing the bend geometry; in [7] the problem of pipes junction is numerically analyzed and many works that focused in particular on the T-junction, as for example [8], are available. None of the numerous works available in literature, however, cover the field of fluid power applications, where the flow and corresponding Reynolds number values are more typical of a turbulent flow, and where the overall flow disturbances are caused by consistent geometry irregularities and bends that are positioned close to each other.…”

Section: Introductionmentioning

confidence: 99%

Pressure Losses in Multiple-Elbow Paths and in V-Bends of Hydraulic Manifolds

et al. 2017

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Hydraulic manifolds are used to realize compact circuit layouts, but may introduce high pressure losses in the system because their design is usually oriented to achieving minimum size and weight more than reducing the pressure losses. The purpose of this work is to obtain the pressure losses when the internal connections within the manifold are creating complex paths for the fluid and the total loss cannot be calculated simply as the sum of the single losses. To perform the analysis both Computational Fluid Dynamic (CFD) analysis and experimental tests have been executed. After the comparison between numerical and experimental results, it was possible to assess that the numerical analysis developed in this work is able to depict the correct trends of the pressure losses also when complex fluid path are realized in the manifold. Successively, the numerical analysis was used to calculate the pressure loss for inclined connections of channels (or V-bends), a solution that is sometimes adopted in manifolds to meet the design requirements aimed towards the minimum room-minimum weight objective.

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“…1958, 1961; Blaisdel and Manson 1963; Ito and Imai 1973; Lindvall 1984, 1987; Johnston and Volker 1990; Miller 1990; Serre et al . 1994; Ramamurthy and Zhu 1997). These tests were conducted with different branch and main diameter ratios and with different pipe alignment.…”

Section: Introductionmentioning

confidence: 99%

“…A large number of experimental studies have provided various energy loss coefficients for flow past junctions of closed pipes carrying a pressurized flow regime (McNown, 1954;Gardel, 1957a, b;Sangster et al, 1958Sangster et al, , 1961Blaisdel and Manson, 1963;Ito and Imai, 1973;Lindvall, 1984Lindvall, , 1987Miller, 1990;Serre et al, 1994;Ramamurthy and Zhu, 1997). These tests were conducted with different branch and main diameter ratios and with different pipe alignment.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the carrying capacity of a subsurface drainage network based on a spatially varied flow regime

Bayat

Kouchakzadeh

Azimi

2010

Irrigation and Drainage

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The carrying capacity of a subsurface drainage network based on spatially varied flow with increasing discharge and the presence of a free surface is examined and reported. The discharge capacity of a subsurface drainage network depends on the hydraulic and geometric parameters of the network components which should be clearly identified. In this regard, a prototype scale experimental set-up was prepared to determine the major head loss of the corrugated pipes employed in these networks and to investigate the minor head losses of different network junction types. According to the compiled data, average values for the major and minor head loss coefficients were proposed and employed for modelling the flow condition within a subsurface drainage network. The model determines the network discharge capacity based on the real flow condition, i.e. a free surface spatially varied flow regime. Comparison between the outputs of the applied model with that of the traditional relationships indicated a large discrepancy. The results revealed that applying existing formulations in the design process would likely pressurize significant portions of the network which could affect the water depletion period from the plant root zone. Copyright A cet effet un dispositif expérimental est développé pour mesurer les pertes en charge linéaires des tuyaux annelés employés dans ces réseaux, ainsi que les pertes en charge singulières des différents composants. Des valeurs pour les coefficients de pertes en charges linéaires et singulières sont proposées et utilisées pour modéliser l'écoulement dans le réseau de drainage. Le modèle détermine le débit maximal admissible du réseau dans les conditions réelles de l'écoulement varié à surface libre. Les valeurs fournies par le modèle diffèrent sensiblement des valeurs fournies par les relations couramment utilisées. Les résultats montrent que ces relations courantes amènent à concevoir des réseaux qui passent localement en charge sur des longueurs significatives, avec des conséquences possibles sur le ressuyage du sol dans la zone racinaire.

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Energy Loss at Combining Pipe Junction

Cited by 32 publications

References 4 publications

Numerical investigation of the effects of combining sewer junction characteristics on the hydraulic parameters of flow in fully surcharged condition

Numerical investigation of the effects of combining sewer junction characteristics on the hydraulic parameters of flow in fully surcharged condition

Pressure Losses in Multiple-Elbow Paths and in V-Bends of Hydraulic Manifolds

Evaluating the carrying capacity of a subsurface drainage network based on a spatially varied flow regime

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