Browsing Engineering by Author "Novakoski, Carolina Kuhn"

Now showing items 1-8 of 8

    • Extreme pressures and risk of cavitation in steeply sloping stepped spillways of large dams 

      Novakoski, Carolina Kuhn; Ferla, Rute; Marques, Marcelo Giulian; Prá, Mauricio Dai; Canellas, Alba Valéria Brandão; Teixeira, Eder Daniel (2022) [Journal article]
      Stepped spillways have been increasingly used to handle flood releases from large dams associated with hydropower plants, and it is important to evaluate the fluctuating pressure field on the steps. Hydraulic model ...

    • Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates 

      Ferla, Rute; Novakoski, Carolina Kuhn; Castiglio, Guilherme Santanna; Prá, Mauricio Dai; Marques, Marcelo Giulian; Teixeira, Eder Daniel (2023) [Journal article]
      Aerator systems promote additional insertion of air into the flow and can reduce the risk of cavitation and consequent damage to hydraulic structures. This work analyzes the hydrodynamic pressures on the steps of a physical ...

    • Induced aeration flow over stepped spillways: mean pressures, air entrainment and flow behavior 

      Novakoski, Carolina Kuhn; Ferla, Rute; Priebe, Priscila dos Santos; Abreu, Aline Saupe; Marques, Marcelo Giulian; Dai Prá, Maurício; Canellas, Alba Valéria Brandão; Teixeira, Eder Daniel (2021) [Journal article]
      Stepped spillways can dissipate a great amount of energy during the flow passage over the chute, however these structures have limited operation due to the risk of cavitation damage. The induced aeration may protect the ...

    • Influence of aeration induced by piers on the starting position of the flow aeration and extreme pressures in stepped spillways 

      Priebe, Priscila dos Santos; Ferla, Rute; Novakoski, Carolina Kuhn; Abreu, Aline Saupe; Teixeira, Eder Daniel; Prá, Mauricio Dai; Marques, Marcelo Giulian (2021) [Journal article]
      The operation of stepped spillways is limited by a range of discharges due to the risk of occurrence of the cavitation phenomenon and erosion on its steps. Since there is a demand for spillways with the possibility of ...

    • Longitudinal distribution of extreme pressures in a hydraulic jump downstream of a stepped spillway 

      Novakoski, Carolina Kuhn; Hampe, Roberta Ferrão; Conterato, Eliane; Marques, Marcelo Giulian; Teixeira, Eder Daniel (2017) [Journal article]
      The overflow system of a dam safely controls the water level of a reservoir. The design of these structures should predict the damage caused by the action of the turbulent flow to which they are subject to. The combination ...

    • Macro-turbulent characteristcs of pressures in hydraulic jump formed downstream of a stepped spillway 

      Novakoski, Carolina Kuhn; Lima, Guilherme Abud; Conterato, Eliane; Marques, Marcelo Giulian; Mees, Alexandre Augusto Alves; Teixeira, Eder Daniel (2017) [Journal article]
      Stilling basins are structures built at the base of the spillway to dissipate energy, by means of a hydraulic jump. Hydraulic jump is a turbulent phenomenon that causes large pressure fluctuation in the stilling basin ...

    • Stepped spillways with aerators : hydrodynamic pressures and air entrainment 

      Ferla, Rute; Novakoski, Carolina Kuhn; Priebe, Priscila dos Santos; Prá, Mauricio Dai; Teixeira, Eder Daniel; Marques, Marcelo Giulian (2021) [Journal article]
      The possibility of damage due to the phenomenon of cavitation leads the design of stepped spillways considering maximum specific discharges of 15 to 30 m2/s, a limit considerably lower than that practiced on smooth chutes. ...

    • Stepped spillway with pre-aeration by a deflector: flow characteristics 

      Novakoski, Carolina Kuhn; Ferla, Rute; Dai Prá, Maurício; Canellas, Alba Valéria Brandão; Marques, Marcelo Giulian; Teixeira, Eder Daniel (2020) [Journal article]
      Stepped spillways aim to dissipate part of the upstream energy during the flow passage by the chute. However, the use of these structures is limited to a restrict range of specific discharges due to the risk of cavitation ...