Computer assisted hydraulic design of tyrolean weirs

Özkaya, Emrah Utku
Tyrolean weir is a type of water intake structure in which water is taken into the channel by bottom racks built on the stream bed. It is generally preferred in order to divert water to run-off river plants on mountainous regions with steep slopes where bed sediment concentration is rather high. In this study; a literature research is conducted in terms of assumptions, approaches, and different calculation methods used for designing a Tyrolean type of intake structure. Broadly accepted and tested design studies in literature are presented, practiced and compared regarding the type of approaches and assumptions made for related methods. A computer program is developed to perform design and analysis. In the design part, number of bars, their thickness, spacing and length are determined for the given design discharge to be diverted. In the analysis part of the program, flow depth over the trash rack is obtained and discharge taken into the intake channel is calculated by using stream discharge, trash rack length, bar types, and bar cross-sections as input values. An application study conducted to guide through the stages of analysis and design calculation methods.


Determination of optimum rack angle of tyrolean type water-intake structures
Melek, Abiddin Berhan; Göğüş, Mustafa; Department of Civil Engineering (2017)
Tyrolean weir is known as an effective device to separate major part of sediment from the main channel flow in order to provide required sediment-free water discharge for run-off river hydropower plants. Basically, in the design of Tyrolean weirs, the main concern is to divert at least the design discharge of the facility while it permits to enter the minimum amount of bed-sediment to the system. In this study, water and sediment capture rates of Tyrolean type water-intake structures were investigated for a...
Hydraulic characteristics of tyrolean weirs having steel racks and circular-perforated entry
Şahiner, Halit; Göğüş, Mustafa; Department of Civil Engineering (2012)
Tyrolean type water-intake structures are commonly used on mountain rivers to supply water to hydropower stations. The amount of water to be diverted from the main channel is the major concern in these kind of structures and should not be less than the design discharge. In this study a physical model of a Tyrolean type water-intake structure was built at the laboratory and the diverted flow from the main channel through the intake structure having steel racks and perforated plates of different types were me...
Experimental Investigation of Flow Conditions over Cambasi Dam Spillway
Altan Sakarya, Ayşe Burcu; Aydın, İsmail; Göğüş, Mustafa; Köken, Mete (2013-09-13)
The entrance conditions, flow around the piers and the pressure distributions along the centerline and the side of the spillway channel for different discharges were investigated for Cambasi dam that will be constructed at the intersection of Kabali and Hamzabey rivers in Ordu District. Hydraulic model of the spillway was constructed at a length scale of 1/20, based on the Froude similarity. Additionally, the water depths and the velocities through the channel sections at different locations were investigat...
Hydraulic design of tyrolean weirs in hydropower plant projects
Maraş, Cihan; Göğüş, Mustafa; Department of Civil Engineering (2014)
Intake structures are defined as structures that divert water into a channel or tunnel leading to a powerhouse. A water intake structure must be able to divert the design discharge into the conveyance system with minimum head loss and negative impact on the local environment. Design and location of intakes are dependent on geological, hydraulic, structural and economic conditions. Tyrolean type water-intake structures are commonly constructed on steeply sloped mountain rivers with reliable rock foundation t...
Numerical modelling of contracted sharp crested weirs /
Duru, Aysel; Altan Sakarya, Ayşe Burcu; Kökpınar, M. Ali; Department of Civil Engineering (2014)
Sharp crested weirs and gates are flow measurement structures which are frequently used for discharge measurements in channels and laboratories. In this thesis, numerical modelling technique was used in the solution of two flow measurement problems, namely contracted sharp crested weirs (Problem 1) and combined weir and gate system (Problem 2). The numerical simulation of flow cases having similar conditions with the experiments from the previous studies is performed for both Problem 1 and 2. The basic flow...
Citation Formats
E. U. Özkaya, “Computer assisted hydraulic design of tyrolean weirs,” M.S. - Master of Science, Middle East Technical University, 2015.