Experimental survey of energy dissipation in nappe flow regime in stepped spillway equipped with inclined steps and sill

Amir Kamyab Moghaddam, Milad Ketabdar, Sepideh Amir Ahmadian, Pedram Hoseini and Mohammadali Pishdadakhgari

MPRA Paper from University Library of Munich, Germany

Abstract: Stepped spillway increases the hydraulic resistance against flow by using of step-made spillway floor and when the flow of water passing on steps, a significant part of energy dissipates and also reduces the risk of cavitation. In this experimental research, in order to increase the energy dissipation of stepped spillway, Steps has a reverse gradient and in other part of this tests in addition to create a reverse gradient in the steps at the same time the sill is also installed on the edge of the steps. Height, thickness of the sills is considered variable. The results show that in both Nappe Flow Regime and Skimming Flow Regime Change of gradient, sills height, thickness are effective to increase the energy loss but the effect of these parameters on the Nappe Flow Regime is much greater than Skimming Flow Regime. By analyzing the results of the experiments and compared with results from other studies, the research showed that the method used in this study has a better energy loss than other methods used in prior researches.

Keywords: stepped spillway; Nappe Flow Regime; Skimming Flow Regime; energy loss; experimental method (search for similar items in EconPapers)
JEL-codes: L74 O13 O14 (search for similar items in EconPapers)
Date: 2017-05, Revised 2017-04
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

Published in International Journal of Research and Engineering 05.04(2017): pp. 161-165

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