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Author : Bahram Aminipouri
Release : 1991
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Developments in the Hydraulic Design of Labyrinth Weirs by : Bahram Aminipouri
Download or read book Developments in the Hydraulic Design of Labyrinth Weirs written by Bahram Aminipouri. This book was released on 1991. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Henry T. Falvey
Release : 2003-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 311/5 ( reviews)
Book Synopsis Hydraulic Design of Labyrinth Weirs by : Henry T. Falvey
Download or read book Hydraulic Design of Labyrinth Weirs written by Henry T. Falvey. This book was released on 2003-01. Available in PDF, EPUB and Kindle. Book excerpt: A labyrinth weir is a series of duckbill spillways for controlling the flow of water over a dam or channel. This slim volume compares the crest shapes used on weirs, identifies considerations for designing downstream chutes and dealing with sedimentation, explores general guidelines for parameter se
Author : Sébastien Erpicum
Release : 2011-05-10
Genre : Technology & Engineering
Kind : eBook
Book Rating : 066/5 ( reviews)
Book Synopsis Labyrinth and Piano Key Weirs by : Sébastien Erpicum
Download or read book Labyrinth and Piano Key Weirs written by Sébastien Erpicum. This book was released on 2011-05-10. Available in PDF, EPUB and Kindle. Book excerpt: Labyrinth spillways are almost as old as dam engineering. In spite of the fact that they appear as a very good technical-economical compromise, only 0.1% of large dams are equipped with such weirs. The main reason for this is that traditional labyrinth weirs usually cannot be installed on top of concrete gravity dams as they require a large foundat
Author : Sébastien Erpicum
Release : 2013-10-21
Genre : Technology & Engineering
Kind : eBook
Book Rating : 85X/5 ( reviews)
Book Synopsis Labyrinth and Piano Key Weirs II by : Sébastien Erpicum
Download or read book Labyrinth and Piano Key Weirs II written by Sébastien Erpicum. This book was released on 2013-10-21. Available in PDF, EPUB and Kindle. Book excerpt: Dam engineering is currently experiencing a strong revival of labyrinth oriented weirs. Labyrinth weirs, with a repetitive constructional character and an increased specific discharge capacity, are a very good technical-economical compromise. The concept of Piano Key Weir (PKW), with alveoli developed in overhangs from a reduced support area, enables the installation of non-linear crests at the top of concrete dams. As a result it eliminates the main drawback of classical labyrinth weirs, and enables their use to rehabilitate numerous existing dams. Since the first implementation of piano key weirs by Electricité de France on Goulours dam (France) in 2006, at least eight PKWs have been built in France, Vietnam and Switzerland. Their operation over a few years has already provided the first prototype data. Other projects are under study, construction or planning in varied countries. On another hand, research programs are under progress all over the world. Following a first edition in 2011, Labyrinth and Piano Key Weirs II – PKW 2013 collects up-to-date contributions from people with various backgrounds, from engineers and researchers to academics. Summarizing the last developments on labyrinth oriented weirs, the book constitutes the state-of-the-art in research and application of piano key weir solutions, and will be invaluable to professionals and scientists interested in Dams Engineering.
Author : Brian Mark Crookston
Release : 2010
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Labyrinth Weirs by : Brian Mark Crookston
Download or read book Labyrinth Weirs written by Brian Mark Crookston. This book was released on 2010. Available in PDF, EPUB and Kindle. Book excerpt: Labyrinth weirs are often a favorable design option to regulate upstream water elevations and increase flow capacity; nevertheless, it can be difficult to engineer an optimal design due to the complex flow characteristics and the many geometric design variables of labyrinth weirs. This study was conducted to improve labyrinth weir design and analyses techniques using physical-model-based data sets from this and previous studies and by compiling published design methodologies and labyrinth weir information. A method for the hydraulic design and analyses of labyrinth weirs is presented. Discharge coefficient data for quarter-round and half-round labyrinth weirs are offered for 6° sidewall angles 35°. Cycle efficiency is also introduced to aid in sidewall angle selection. Parameters and hydraulic conditions that affect flow performance are discussed. The validity of this method is presented by comparing predicted results to data from previously published labyrinth weir studies. A standard geometric design layout for arced labyrinth weirs is presented. Insights and comparisons in hydraulic performance of half-round, trapezoidal, 6° and 12° sidewall angles, labyrinth weir spillways located in a reservoir with the following orientations are presented: Normal, Inverse, Projecting, Flush, Rounded Inlet, and Arced cycle configuration. Discharge coefficients and rating curves as a function of HT/P are offered. Finally, approaching flow conditions and geometric similitude are discussed; hydraulic design tools are recommended to be used in conjunction with the hydraulic design and analysis method. Nappe aeration conditions for trapezoidal labyrinth weirs on a horizontal apron with quarter- and half-round crests (6° sidewall angle 35°) are presented as a design tool. This includes specified HT/P ranges, associated hydraulic behaviors, and nappe instability phenomena. The effects of artificial aeration (a vented nappe) and aeration devices (vents and nappe breakers) on discharge capacity are also presented. Nappe interference for labyrinth weirs is defined; the effects of nappe interference on the discharge capacity of a labyrinth weir cycle are discussed, including the parameterization of nappe interference regions to be used in labyrinth weir design. Finally, the applicability of techniques developed for quantifying nappe interference of sharp-crested corner weirs is examined.
