عنوان مقاله :
The Study of Hydraulic Properties of Quarter-Circular Crested Stepped Spillway
پديد آورندگان :
Parsaie ، Abbas Lorestan University - Water Engineering Department , Haghiabi ، AmirHamzeh Lorestan University - Water Engineering Department , Saneie ، Mojtaba Soil Conservation and Watershed Management Institute , Torabi ، Hasan Lorestan University - Water Engineering Department
كليدواژه :
Circular Crested Weir , Cascade Weir , Discharge Coefficient , Flow Measurement , Energy dissipation
چكيده فارسي :
In this paper, the quartercircular crested stepped spillway (QCSS) is introduced and its hydraulic properties including the discharge coefficient (Cd) and energy dissipation of flow are investigated. The QCSS consists of a quartercircular as the crest and a stepped chute. The Cd of QCSS variates between 0.9 and 1.4 considering the range of relative upstream head (hup/R) between 0.1 and 1.0, but at the same range of hup/R, the Cd of the broad crested stepped spillway (BCSS) changes between 0.9 and 1.0. The ratio of energy dissipation changes between 30% and 98% for both hydraulic models. Comparing the performance of QCSS and BCSS shows that in the skimming flow condition, the Cd of QCSS is about 30%more than the BCSS. Whereas, in the same flow regime, the energy dissipation of the flow on QCSS is a bit less than the BCSS about 10%.
عنوان نشريه :
علوم و مهندسي آبياري
عنوان نشريه :
علوم و مهندسي آبياري
