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Nappe flow regime energy loss in stepped chutes equipped with reverse inclined steps: experimental development

Author

Listed:
  • Hamedi, Amirmasoud
  • Ketabdar, Milad
  • Fesharaki, Mohammad
  • Mansoori, Abbas

Abstract

With advances in technology and the invention of the Roller-Compacted Concrete (R.C.C) technique, stepped spillway construction has become much faster than in the past. Due to this, designers have become more interested in using this kind of chute as one of the best energy dissipaters. Along with the increasing use of stepped spillways, researchers have focused on increasing the efficiency of this hydraulic structure. They have proposed different methods to achieve this. Step geometry optimization, regarding flow regime type, is one of these efforts. In this experimental research, reverse inclined steps have been applied for three degrees (7o, 10 o, and 12o) to investigate their effect on the energy dissipation rate in the Nappe Flow Regime of stepped spillways. Energy loss rates obtained from the reverse inclined steps have been compared with the energy loss rate in a horizontal step. Results indicate a slight increase in the energy loss rate when the reverse inclined steps have been applied in the Nappe Flow Regime of stepped spillways.

Suggested Citation

  • Hamedi, Amirmasoud & Ketabdar, Milad & Fesharaki, Mohammad & Mansoori, Abbas, 2015. "Nappe flow regime energy loss in stepped chutes equipped with reverse inclined steps: experimental development," MPRA Paper 96176, University Library of Munich, Germany, revised Dec 2015.
  • Handle: RePEc:pra:mprapa:96176
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    References listed on IDEAS

    as
    1. Rahmani, Fatemeh & Razaghian, Farhad & Kashaninia, Alireza, 2014. "High Power Two- Stage Class-AB/J Power Amplifier with High Gain and Efficiency," MPRA Paper 86867, University Library of Munich, Germany, revised May 2014.
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    More about this item

    Keywords

    roller-compacted concrete (R.C.C) technique; stepped spillway; step geometry optimization; nappe flow regime;
    All these keywords.

    JEL classification:

    • L72 - Industrial Organization - - Industry Studies: Primary Products and Construction - - - Mining, Extraction, and Refining: Other Nonrenewable Resources
    • L74 - Industrial Organization - - Industry Studies: Primary Products and Construction - - - Construction
    • Q25 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Water

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