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Static Pressure Analysis in Stepped Chutes with Inclined and Horizontal Steps in Nappe and Skimming Flow Regimes

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

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Abstract (2. Language): 
Spillway is one of the most important parts of a dam to control the flood. Among different types of spillways, stepped spillways is one of the best energy dissipaters. By advances in technology and the satisfaction of two elements of safe and low cost construction the usage of stepped spillway is increased widely. Due to this fact, more studies are focused on the stepped spillways. Researchers made some efforts and proposed different methods to improve the efficiency of this structure to dissipate energy. Modification on step geometry, regarding flow regime type, is one of these efforts. Flow pressure and its fluctuations on the steps of the stepped spillways is one of the main factors affecting the design and safety of this structure. In this experimental research, reverse inclined steps have been applied in three degrees [0o (horizontal), 7o, 10o] to obtain static pressure in both nappe flow and skimming flow regimes of stepped spillways. Static pressure obtained from reverse inclined steps have been compared to the amount in horizontal step. Results indicate slight increase in energy loss rate when reverse inclined steps have been applied in nappe flow regime of stepped spillways.
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REFERENCES

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