Formation conditions of wave-type flows at stilling basins with a drop

EROĞLU N., TAŞTAN K.

Proceedings of the Institution of Civil Engineers: Water Management, cilt.177, sa.4, ss.240-251, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 177 Sayı: 4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1680/jwama.22.00077
  • Dergi Adı: Proceedings of the Institution of Civil Engineers: Water Management
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Environment Index, Geobase, ICONDA Bibliographic, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.240-251
  • Anahtar Kelimeler: flow characteristics, fluid mechanics, hydraulics & hydrodynamics, laboratory tests, river engineering
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, formation conditions of maximum and minimum wave-type jumps are experimentally investigated. A total of 110 wave-type jump experiments are carried out. Experiments are conducted for several discharges, supercritical upstream and subcritical downstream water depths, and drop heights. According to the experimental results, the effective parameters on wave-type jumps are the upstream Froude number and the relative drop height. As the classical hydraulic jump equation is not sufficient to define conjugate depths of wave-type flow, empirical equations are presented for defining conjugate depths for both maximum and minimum wave- type jumps for which no sufficient experimental data is present in the available literature, and the agreement between the calculated and measured conjugate depths is found to be good. It is revealed that the value of the lower limit for the upstream Froude number is not constant for the formation of the maximum wave jump, and it depends on the relative drop height. Furthermore, experimental results of this study showed that energy dissipation ratios of maximum and minimum wave-type jumps are equal or larger than those of the classical hydraulic jumps. For this reason, wave-type jumps may be preferred at stilling basins with drops along with A-jumps.