Boundary of Transition Flow Regime on Stepped Spillways by Physical Modeling

In a tiptoed chute, the chute face is ready a succession of steps from familiar the emblem to the dactyl. The strength wantonness generated for one steps reduces the necessary length of the strength person who is immoral that is mainly supported at the phalanx of the chute. Stepped spillways have existed innate ancient times and skilled is interest in bureaucracy by way of meaningful cost funds. The purpose concerning this study search out decide the hydraulic environments that rule ther change flow reign. For this purpose, 11 material models of walked spillways were erected accompanying 15, 25, and 45 standard slopes and various step numbers from 3 to 50. The breadth of flumes for establishing the strode spillways were 50 and 25 cm. Results demonstrated that dimensionless limits h/l (chute slope) and yc/h (fault-finding insight to step altitude percentage) are active at doing the incident of a change flow government. Two lines that are main are the “highest level for the nappe flow rule” and the “lower limit for the glancing flow establishment”. Boundary outlined in this place study are urged for future uses and design of hydraulic constructions.

Author(s) Details:

Farzin Salmasi,
Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

John Abraham,
University of St. Thomas, Minnesota, School of Engineering 2115 Summit Avenue St. Paul, Minnesota 55105, USA.

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Keywords: Stepped spillway, transition, skimming, nappe flow regime

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