Numerical investigation of a combined system of piano key weirs and stepped spillway using FLOW-3D

2017-06-07
Piano key weirs are useful overflow structures to increase discharge capacity per unit length of spillway crest for relatively small heads over the weir compared to a standard straight weir crest. Stepped spillways are an economical alternative for roller compacted concrete dams which use the dam surface as an energy dissipating structure leading to a more economical stilling basin at the toe of the spillway. Air entrainment and bulking effects are extremely important in a stepped spillway, which should be taken into account in the modelling process. Aşağı Kaleköy Dam spillway is hydraulically a very complicated spillway with different components which have different hydraulic characteristics. Because of their limited crest length, piano key weirs are used at the crest of the dam which is connected to a stepped spillway. Since the total design discharge cannot be passed through this system, six individual orifice spillways are added inside the dam body. Because of the topographic limitations the spillway is contracted in the downstream direction. All of these features required an extensive numerical investigation in the prototype scale. In this study, flow conditions for Aşağı Kaleköy Dam Spillway are investigated using FLOW-3D.
Citation Formats
M. Köken and İ. Aydın, “Numerical investigation of a combined system of piano key weirs and stepped spillway using FLOW-3D,” 2017, Accessed: 00, 2021. [Online]. Available: https://www.flow3d.com/resources/conference-proceedings/water-and-environmental-presentations/.