Determination of appropriate dimensions of submerged vanes

Mirzaei, Seyed Hessam Seyed; Firoozfar, Ali Reza; Ayyoubzadeh, Seyed Ali

doi:10.1680/wama.14.00145

Cited by 3 publications

(4 citation statements)

References 20 publications

(23 reference statements)

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“…The effectiveness of the submerged vanes is determined by their number, shape, size, and configuration. The influence exerted by a plethora of parameters that show efficacy in sedimentation in the intake zone must be noted when the optimum values for the size or configuration of the vanes is to be ascertained [39]. In the first step of designing the submerged vanes at the water intake points, the downstream tube generated by the dividing surface and bank line must be identified (Eq.…”

Section: Shape and Dimensions Of The Vanesmentioning

confidence: 99%

“…Several researchers examined the features of vane design to control the sediment entry at the intake structures. Mirzaei et al, [39] investigated to determine the correct dimensions of submerged vanes placed in front of a 90 o intake from a straight channel. Optimization was performed using Fuzzy TOPSIS, a multi-objective optimization technique where ten parameters were considered.…”

Section: Shape and Dimensions Of The Vanesmentioning

confidence: 99%

“…In the simulations, three discharge ratios (11%, 16%, and 21%) were used. From the results, it is evident that for the submerged vanes in front of the lateral intakes from straight channels, the acceptable parameters include a height of 0.2 times the flow depth and a length of four times the vane height [39]. The recommendations of Odgaard [31] are considered the standard dimensions for the design and layout of the vanes.…”

Section: Shape and Dimensions Of The Vanesmentioning

confidence: 99%

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Sediment Control At The Lateral Channel Inlet

Al-Zubaidy

Ismaeil

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Environmental and civil engineering projects frequently employ the open channel side intake structure. However, the commonest among the issues faced in most of the lateral intakes include sedimentation and sediment delivery. This involves several problems namely, decreased flow discharge capacity in the irrigation canals and the threat of water blockage during times of low water flow. Besides, this problem with the sediment either lowers the performance levels or causes failure of the facilities that this sub-channel serves. Hence, the engineers focused on designing an intake with the features of high flow discharge and low sediment delivery. This paper attempts to review and summarize the literature relevant to the branching channel flow and submerged vane technique to minimize the sediment-related issues. The present review highlights that most of the earlier research work done dealt with the characteristics of the flow in a right-angle branch channel possessing rigid confines. Also, more investigations are required regarding the implications of the submerged vanes. Besides, no comprehensive studies are available on the saddle point itself, and a high percentage of the studies have been part of earlier investigations that had focused on only briefly outlining this subject.

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Section: Shape and Dimensions Of The Vanesmentioning

confidence: 99%

Section: Shape and Dimensions Of The Vanesmentioning

confidence: 99%

Section: Shape and Dimensions Of The Vanesmentioning

confidence: 99%

See 1 more Smart Citation

Sediment Control At The Lateral Channel Inlet

Al-Zubaidy

Ismaeil

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The fourth paper (Mirzaei et al, 2016) was concerned with the determination of the dimensions of submerged vanes commonly used in front of intake ports to control sediment inflow in intake channels. To be effective in performing this function, the vanes must be appropriately sized; a task described by the authors as complex given the large number of factors that must be taken into account.…”

mentioning

confidence: 99%

Editorial

Adeloye¹

2016

Proceedings of the Institution of Civil Engineers - Water Manag

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This issue of Water Management comprises three technical papers and one paper discussing an article that appeared in a previous edition of the journal. Two of the technical papers are concerned with water resource issues, with the first discussing improved optimisation of an existing hydropower reservoir in China, and the other pertaining to rainwater harvesting practice in Trinidad and the need for reliable water consumption data for better design and operation of domestic rainwater harvesting facilities. The third technical paper and indeed the discussion paper were mostly concerned with hydraulics.The first paper (Yang et al., 2016) is a discussion of a previous paper published in a 2013 edition of the journal (Borghei et al., 2013), in which the authors had investigated the hydraulic characteristics of triangular labyrinth side weirs with one and two cycles. Much of the discussion focused on the comparison of triangular labyrinth side weirs and trapezoidal labyrinth side weirs, for which apparently conflicting guides have appeared in the literature, especially in relation to the discharge coefficient. The contributors argued that the results presented by the authors are more plausible than those reported by earlier independent studies that appeared to show that trapezoidal labyrinth weirs have higher discharge coefficients than triangular labyrinth side weirs. They also confirmed that while the discharge coefficient of the triangular labyrinth side weir will significantly decrease as the flow rises, trapezoidal labyrinth weirs behave in an exactly opposite way. The authors, in their response, were pleased with the contributors for showing interest in their work and for clarifying some other aspects of their original study. Given the significance of weirs in flow measurements and control, the original study and this discussion have, in my opinion, offered useful information for practitioners and researchers in open channel flow hydraulics and measurement.The second paper (Shen and Cheng, 2016) describes the development of a hybrid, multi-objective optimisation hydropower reservoirs system operation with application to the cascaded hydropower plants on the Hongshuihe River in China. The hybrid optimisation approach combines three different steps: system evaluation, an integrated search that explores initial feasible solutions thus effectively delineating the rational search range, and a final improved discrete differential dynamic programming (DDDP) method that solves the final optimisation problem with its complex system objectives and constraints. There are two competing objectives considered for the Hongshuihe facilities: the maximisation of the total energy production; and the guaranteeing of power generation during the dry season (i.e. the firm power). The study clearly demonstrated that, for the case study system analysed, the newly developed method was slightly superior by generating more power during the dry season when compared to the other approaches tested, such as the use of single objective or the...

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Effect of submerged vanes in front of circular reservoir intake on sediment flushing cone

Beiramipour

Qaderi

Rahimpour

et al. 2021

Proceedings of the Institution of Civil Engineers - Water Manag

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Reservoir sedimentation is a long-term process with various risks, such as reduction of storage capacity, hydropower generation and flood control functions throughout a reservoir's lifespan. For reservoirs facing loss of function with severe deposition, sediment flushing is an approach to preserving long-term storage. Here, submerged vanes combined with pressure flushing operations are proposed to facilitate scouring of such deposition. Experiments with various submerged vane heights, inclination angles on the flow direction, spacing, and divergent and convergent arrangements were conducted to investigate the scour cone volume and removal efficiency. Results showed that two divergent submerged vanes at an angle of 20° on the flow direction and optimum vane spacing ratios removed the deposited sediment significantly. In the presence of the submerged vanes, final sediment flushing volume and efficiency increased by a factor of 48 compared to the reference test. Using the experimental results, three equations were proposed to estimate the scour cone dimensions (length, width and depth). Additionally, a non-dimensional equation was developed for estimating the scour cone volume, using a polynomial correlation with vane spacing. The results of this study recommend the best installation of submerged vanes for releasing deposited sediments in the region near the bottom outlets of reservoirs.

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Determination of appropriate dimensions of submerged vanes

Cited by 3 publications

References 20 publications

Sediment Control At The Lateral Channel Inlet

Sediment Control At The Lateral Channel Inlet

Editorial

Effect of submerged vanes in front of circular reservoir intake on sediment flushing cone

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