Effect of rounding edges of stepped spillways on the flow characteristics

Zare, H. K.; Doering, John C.

doi:10.1139/l11-121

Cited by 14 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experimental laboratory studies conducted under these conditions provide accurate results for practice when water flows through a culvert from a discharge facility [3,4]. In the physical modeling of hydraulic phenomena, it is expedient to fulfill the conditions of geometric similarity, the similarity of initial and boundary conditions, dynamic and kinematic similarity laws corresponding to the forces involved in the formation of the flow [15][16][17][18].…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, maneuvering schemes that lead to a state of symmetrical distribution of specific consumption during operation are widely used. In the dissertation work, taking into account this situation, the hydraulic regimes of the flow in the symmetrical maneuvering process were studied[15][16][17][18].Considering the above, 5 views of the most widely used maneuvering schemes for the symmetrical flow of water in drainage facilities were adopted. A table of these schemes is given in Table1.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

et al. 2021

View full text Add to dashboard Cite

For multi-section drainage facilities, it is important to develop operational measures based on maneuvering moving barriers. Maneuvering of moving barriers is a measure that carries out the flow of water from the upper reaches to the lower reaches at the required level, taking into accounts the design features and operational mode of the hydraulic regime of the drainage structure. The maneuvering mode in the flow of water from the discharge structures ensures the order of opening, phasing, and level of opening of these movable barriers. Hydraulic conditions are associated with the effective control of the hydraulic regime in the lower part of the drainage structure or the suppression of excess kinetic energy, the reversal of the flow, or the prevention of post-riser deformation processes. Creating conditions ensuring that the hydrotechnical and hydropower construction of the water transfer or discharge facility is adapted for use in conjunction with a hydropower plant, water intake, sluices, and flow control system.

show abstract

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Hence, the length of the training wall height in a round stepped spillway decreases by approximately 20%. The risk of cavitation in a round stepped spillway is also less than that of a flat stepped spillway [23].…”

Section: LImentioning

confidence: 99%

Effect of Height and Geometry of Stepped Spillway on Inception Point Location

2019

View full text Add to dashboard Cite

Air entrainment in a stepped spillway is very important to protect the spillway from cavitation damage. The inception point is the location where air starts entering the non-aerated flow zone. The inception point location depends on different parameters, such as the discharge, step height, and step shape. In this paper, various stepped spillways, including flat steps, pooled steps, and round steps with different step heights were numerically simulated using the volume of fluid and realizable k-ε models. The results indicate that the inception point location moves downwards with the increase of the discharge of the stepped spillways. The length of the non-aerated flow zone increases with the discharge. The inception point location moves downwards as the step height decreases and the step number increases at the same discharge. The inception point location of the round stepped spillway model is much closer to the spillway crest than that of the flat stepped spillway with the same number of steps. The inception point location of the pooled stepped spillway is closer to the spillway crest than that of the flat stepped spillway, but more downstream than that of the round stepped spillway.

show abstract

“…e residual head at the chute end is a key parameter for evaluation of the hydraulic performance of a spillway. e relative energy loss (η) is commonly used to quantify its energy dissipation [11,19,27,35]:…”

Section: Downstream Flow Patternsmentioning

confidence: 99%

“…For instance, Felder [6]; Zare and Doering [17]; and Kökpinar [18] looked into the aeration and flow resistance in stepped spillways with sills and baffles. Experiments by Zare and Doering [19] suggested higher energy dissipation by rounding the step edges. Inclining steps upwards is effective in lowering the outlet velocity and increasing energy loss [20].…”

Section: Introductionmentioning

confidence: 99%

CFD Modelling of a Stepped Spillway with Various Step Layouts

Yang

2019

Mathematical Problems in Engineering

View full text Add to dashboard Cite

A traditional stepped spillway is prone to cavitation risks. To improve its hydraulic behaviors, distorted step faces and pool weirs are devised. By numerical modelling, comparative studies are conducted to look into the flow features. The pressures on step surfaces of the unconventional layouts exhibit 3D distributions. Pool weirs are essential in increasing both the min. and max. pressure loads. Pressures on the downstream bed show a unique pattern for V- and inverted V-shaped models, with the extreme pressures at the sidewalls for the former and at the central plane for the latter. Symmetrical secondary flows are formed in V- and inverted V-shaped cases with different patterns. Distributions of turbulent kinetic energy suggest differences in flow motions in all cases. Furthermore, the relative energy loss of flat setups is ∼5.4% lower than that of the pooled ones with the same step face angle; inverting the face angle does not give rise to noticeable change. The results provide reference for relevant projects.

show abstract

Effect of rounding edges of stepped spillways on the flow characteristics

Cited by 14 publications

References 28 publications

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

Effect of Height and Geometry of Stepped Spillway on Inception Point Location

CFD Modelling of a Stepped Spillway with Various Step Layouts

Contact Info

Product

Resources

About