Sökning: "Aerator"

Visar resultat 1 - 5 av 12 uppsatser innehållade ordet Aerator.

  1. 1. Spillway flow behaviours with and without aeration

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Noel Köhler; [2022]
    Nyckelord :Hydropower; Aeration; Computional Fluid Dynamics CFD ; Spillway; Subpressure; Black Water; Spreading;

    Sammanfattning : Cavitation has been known for a long time to cause damages in spillways athydropower plants, aerators are therefore often implemented to prevent this.The majority of the hydropower plants in Sweden are installed in the northernpart of the country. LÄS MER

  3. 2. Experimental Investigation Of The Air-Water Flow Properties In The Cavity Zone Downstream A Chute Aerator

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Ebba Wargsjö; Albin Hedehag Damberg; [2017]
    Nyckelord :Air bubble entrainment; chute aerators; aerators; air concentration; cavitation; cavitation damage; cavitation bubbles; bubble frequency; scale effects;

    Sammanfattning : Chute aerators are widely used in spillways to avoid cavitation damage. When the water flow passes the aerator, two jets form – upper and lower jet. The purpose of this thesis has been to study the effects from the aerator by conducting experiments in a model with a flow depth large enough to ensure that the upper and lower jet remain separated. LÄS MER

  4. 3. Layout of spillway aerator air ventsand its effect on air supply

    Master-uppsats, KTH/Mekanik

    Författare :Gustav Daggenfelt; [2017]
    Nyckelord :;

    Sammanfattning : Chute aerators are constructed to protect spillways from cavitation damage.They function by launching the water ow as a jet and supplying airunderneath since having air entrained into the water is an eective way tomitigate cavitation. LÄS MER

  5. 4. Förbehandling av skogsindustriellt avloppsvatten i pilotskala : Fluidiserad biofilmsprocess, robust försteg till luftad damm

    M1-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper

    Författare :Liv Bergqvist; [2016]
    Nyckelord :biorening; försteg; pilotskala; MBBR;

    Sammanfattning : Skogsindustriellt avloppsvatten behöver genomgå flertalet reningsprocesser innan det kan återföras till recipient. Vid Stora Ensos bruk i Skoghall används en luftad damm med slamåterföring som biologisk rening. LÄS MER

  7. 5. CFD modelling of dam spillway aerator

    Magister-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Raphaël Damiron; [2015]
    Nyckelord :3D flow; VOF; CFD; aerator; spillway; Technology and Engineering;

    Sammanfattning : The purposes of this master thesis are the simulation of the aerator air flow driven by the spillway water flow in the Bergeforsen dam and the behavior of the flow in the stilling basin. Aerators are employed to supply air at critical locations in the flow where low pressure and cavitation may occur in order to protect the structure. LÄS MER