Results 81 to 90 of about 135 (128)

Discharge Capacity of a Piano Key Weir with Curvilinear Keys

2022
The Piano Key Weir (PKW) has emerged as a cost effective and viable solution for dam rehabilitation and new projects with high level of space constraints. The geometrical dimensions of PKW are main factors affecting their discharging capacity. Since, it is a relatively new type of weir that has only been developed in recent years, the description of ...
Mishra, R. K., Ahmad, Z.
openaire   +2 more sources

Piano-Key-Weirs as in-channel applications

2023
With reduced footprint and excellent hydraulic performance, piano key weirs (PKW) have been gaining growing attention in the past two decades as a favorable up-to-date solution for the rehabilitation of spillways as well as in-channel applications.
openaire   +1 more source

Hydraulics of Piano Key Weirs: A review

2017
The Piano Key Weir (PKW) is a rectangular-labyrinth-type weir that utilizes cantilevered apexes in order to maximize the allowable weir length that can fit in a given spillway channel width, while reducing the required structural footprint. These features make it an interesting and viable solution for increasing discharge capacity at existing dams as ...
Erpicum, Sébastien, Archambeau, Pierre, Dewals, Benjamin, Pirotton, Michel   +3 more
openaire   +2 more sources

Could Piano Key Weirs be subject to nappe oscillations?

2017
Nappe oscillation may affect a variety of free overflow hydraulic structures operating at low heads such as crest gates and various types of weirs. This phenomenon produces oscillations in the thin nappe cascading downstream of the control structure.
Lodomez, Maurine, Pirotton, Michel, Dewals, Benjamin, Archambeau, Pierre, Erpicum, Sébastien   +4 more
openaire   +2 more sources

Piano Key Weir Submergence in Channel Applications

Journal of Hydraulic Engineering, 2012
AbstractWeir submergence can influence head-discharge relationships for weirs used in channel applications when high tailwater conditions exist owing to a downstream control. Weir submergence describes a condition in which the water level downstream of the weir exceeds the weir crest elevation.
M. R. Dabling, B. P. Tullis
openaire   +1 more source

Unsteady Hydrodynamic Behavior at Piano Key Weirs

Journal of Hydraulic Engineering, 2020
AbstractPiano key weirs (PKWs) are nonlinear hydraulic structures that exhibit unsteady hydraulic phenomena.
Frank J. M. Denys, Gerrit R. Basson
openaire   +1 more source

Labyrinth and Piano Key Weirs

2011
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 ...
openaire   +1 more source

On the Piano Key Weir hydraulics

2012
The Piano Key Weir (PKW) is a kind of labyrinth weir with a geometry that uses overhangs to reduce the base length. The PKW can thus be directly placed on the crest of an existing dam. Together with its high discharge capacity for low heads (up to four times as high as an ogee-crested weir of same length), this geometric feature makes the PKW an ...
Machiels, Olivier, Erpicum, Sébastien, Archambeau, Pierre, Dewals, Benjamin, Pirotton, Michel   +4 more
openaire   +1 more source

Evaluation of discharge equations of the piano key weirs

Flow Measurement and Instrumentation, 2019
Abstract In present scenario, Piano key weir has played a vital role in increasing the discharge capacity of the available dams. This modified weir is the replacement of creaky and conventional labyrinth weir and it is best suited for the low head dams. This new labyrinth type weir is utmost solution for the rehabilitation of the spillways all across
Binit Kumar, Subhojit Kadia, Zulfequar Ahmad   +2 more
openaire   +1 more source

Hydromechanics of the Asymmetric Trapezoidal Piano Key and Labyrinth Weirs

Journal of Irrigation and Drainage Engineering - ASCE, 2023
Akbar Safarzadeh
exaly