Flow and Energy Dissipation Over on Flat and Pooled Stepped Spillway

Krisnayanti, Denik Sri; Soehardjono, Soehardjono; Dermawan, Very; Sholichin, Moh.

doi:10.11113/jt.v78.5973

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…, is one of the dimensionless parameters widely used to study the energy dissipation property [27]. Flow discharge calculated using the formula derived by Rehbock [28][29][30].…”

Section: Figure 1 Parameters Of Energy Dissipationmentioning

confidence: 99%

Effect of the Stepped Spillway Geometry on the Flow Energy Dissipation

Gubashi,

Mulahasan,

Hacheem

et al. 2024

Civ Eng J

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In this research, flume experiments were conducted on stepped weirs to investigate the effect of step shape on the energy dissipation of flow. Four configurations with a constant number of steps were considered, namely, horizontal steps, inclined steps, horizontal steps with rounded sills, and ‎inclined steps with rounded sills. The slopes of inclined steps were 13% and 23%, and the diameters of the rounded sills of the step ends were 10 and 15 cm. The majority of previous studies focused on energy dissipation in stepped weirs in horizontal and inclined steps. In this research, new step geometries were used, such as horizontal steps with rounded sills and inclined steps with rounded sills. Dimensional analysis was applied to correlate the different variables affecting the flow hydraulics. Flow rates in the range of 0.61-9.12 lit/sec were used with each step shape. Results showed that the inclined steps with rounded sills had the highest flow energy dissipation in comparison to the other types. Rounded sills at the end of steps had more effective energy dissipation than did the horizontal step. However, the 23% inclination slope with rounded sills of a 7.5 cm radius was the most effective in dissipating flow energy. Doi: 10.28991/CEJ-2024-010-01-09 Full Text: PDF

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“…, is one of the dimensionless parameters widely used to study the energy dissipation property [27]. Flow discharge calculated using the formula derived by Rehbock [28][29][30].…”

Section: Figure 1 Parameters Of Energy Dissipationmentioning

confidence: 99%

Effect of the Stepped Spillway Geometry on the Flow Energy Dissipation

Gubashi,

Mulahasan,

Hacheem

et al. 2024

Civ Eng J

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“…The spillways with end sill are more influential than flat spillways in the rate of dissipation energy of the flow. The increase in the number of steps affects the percentage of dissipation energy of the flow [11]. The percentage of flow energy dissipation within the study's determinants is higher for the stepped weir with a circular end sill at the edge of the steps.…”

Section: Introductionmentioning

confidence: 98%

Flow and Energy Dissipation Over a Cylindrical Stepped Weir

Jomaa¹,

Mohammed²

2022

adeletters

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The great economic importance of increasing the energy dissipation flow rate in stepped weirs prompted researchers to make several changes to the geometrical shape. In this study, (36) physical models were constructed to compare cylindrical stepped weirs with traditional weirs. (27) Models of cylindrical stepped weirs and (9) traditional stepped weirs were based on three heights and three diameters of steps. There are three shapes of the weir steps (Fc = all the steps in a circular shape, i.e., without cutting), (Fc & Hc = one round and the other half cut, respectively) and (Hc = all the steps are cut in half). The study showed that the percentage of energy dissipation in weirs increases with the height of the weir (P). Increasing the diameter of the degree (D) and increasing the number of steps (n), and changing the shape of the degrees, as the case (Fc & Hc) was better than the case (Fc). In contrast, the state (Hc) was the best among the other instances in the percentage of flow energy dissipation. The cylindrical gradient weirs are more efficient than traditional stepped weirs by approximately (%10), and the highest value for the energy dissipation of the flow was obtained for stepped cylindrical weirs (%67.27).

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