Journal ArticleDOI
Design of Labyrinth Spillways
TLDR
In this paper, the capacity of a labyrinth spillway is a function of the total head, the effective crest length, and the crest coefficient, which depends on the angle of the side legs and the number of cycles.Abstract:
The capacity of a labyrinth spillway is a function of the total head, the effective crest length, and the crest coefficient. The crest coefficient depends on the total head, weir height, thickness, crest shape, apex configuration, and the angle of the side legs. Data and a procedure are presented for designing labyrinth weirs for angles between 6° and 35°, and for a range of heads. The design procedure allows the angle of the side legs and the number of cycles to be varied until the desired layout and capacity are achieved. The solution is presented in a spreadsheet format that automatically calculates the dimensions for the labyrinth. Even though the design procedure is quite accurate, it is recommended that the capacity and performance be verified with a model study. The model can evaluate factors not included in the design procedure, like aeration effects at low heads, unusual flow conditions in the approach channel, and flow conditions in the discharge channel.read more
Citations
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Hydraulic Design of Labyrinth Weirs
TL;DR: A comprehensive handbook on the hydraulic design of labyrinth spillways from theory to current practice is presented in this paper, which provides a fundamental understanding of the theory of labyrinth weirs and continues with detailed sections on significant factors that affect the discharge characteristics, such as crest shape, weir height, and sidewall angle.
Journal ArticleDOI
Head-Discharge Relationships for Submerged Labyrinth Weirs
TL;DR: In this article, a new dimensionless submerged head relationship was developed for submerged labyrinth weirs and a similar relationship was also presented for linear sharp-crested weirs, and the accuracy of the submerged linear weir relationship was equivalent to Villemonte's and is simpler to solve when working in terms of terms.
Journal ArticleDOI
Hydraulic Design and Analysis of Labyrinth Weirs. I: Discharge Relationships
TL;DR: In this paper, a method for the hydraulic design and analysis of labyrinth weirs based upon the experimental results of physical modeling is presented for discharge coefficient data for labyrinth weir with quarter-round and half-round crest shapes.
Journal ArticleDOI
Determination of capacity of labyrinth side weir by CFD
M. Cihan Aydin,M. Emin Emiroglu +1 more
TL;DR: In this article, the results obtained from both methods are in a good agreement, and the discharges performances obtained from CFD analyses were compared with the observed results for various Froude number, dimensionless nappe height and weir width.
Journal ArticleDOI
Experimental observation of flow characteristics over a Piano Key Weir
TL;DR: In this paper, the authors present experimental test results performed on a 1:10 scale model of the Piano Key Weir and determine the flow features along the weir depending on the upstream head.
References
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Journal ArticleDOI
Performance and Design of Labyrinth Weirs
TL;DR: In this paper, the authors describe the results of a program of research on labyrinth weirs that is aimed to provide comprehensive performance and design data, and a mathematical model was constructed and a computer program developed which will predict performance to ± 4% accuracy or better over a wide range of operating conditions.
Dissertation
The performance of labyrinth weirs
TL;DR: In this paper, a mathematical model representing the behaviour of labyrinth weirs has been constructed and translated into a computer program, which can accurately predict the performance of any labyrinth weir subject to some minor restrictions.
Journal Article
Discharge Characteristics of Labyrinth Weirs
TL;DR: In this paper, the hydraulic performance of labyrinth weirs is developed from data obtained from flume studies and site specific models using dimensional analysis, an equation for the discharge is developed and the discharge coefficient defined for triangular and trapezoidal planforms.
Journal ArticleDOI
Boardman Labyrinth—Crest Spillway
TL;DR: In this paper, the design of a spillway with a labyrinth crest was described and a model study was conducted which indicated that actual discharge would be at least 20% lower than originally estimated.