Blar i NTNU Open på forfatter "Kjeldsen, Morten"

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    • Airbag for piping systems 

      Vilberg, Ingrid Kristine (Master thesis, 2010)
      Pressure transients are caused by a change in the volumetric flow in a pipeline system, and can have severe consequences for rapid changes of the volumetric flow. A sudden closure of a valve is a common source of a pressure ...

    • CFD av strømningskarakteristikker i hydrauliske motorer 

      Farstad, Øyvind (Master thesis, 2009)
      CFD-vertøy er i dagens industri et mye brukt redskap for analyse av komplekse strømningsdynamiske problemstillinger. Dette gjelder også hos Rolls-Royce Marine Deckmachinery i Brattvåg. Her blir CFD brukt på hydrauliske ...

    • Continuous Efficiency Measurements on Hydro Power Plants 

      Wiborg, Erik Jacques (Doctoral theses at NTNU;2016:330, Doctoral thesis, 2016)
      In 2012 the largest Norwegian power production company Statkraft initiated a research and development project initially named BlackBox. The company’s main objective for the project was to develop an experimental condition ...

    • Continuous Measurements for Detection of Cavitation Caused by Transients in Hydropower Plants and Fluid Transport Systems 

      Ruud, Kjetil Guddal (Master thesis, 2014)
      Surveillance of operating power plants is a progressing science in the hydropower sector. The efficiency improvements are closing in on the limits and reducing the costs by improvement of turbine life time seems to be a ...

    • Control System on a Wind Turbine: Evaluation of Control Strategies for a Wind Turbine with Hydraulic Drive Train by Means of Aeroelastic Analysis 

      Frøyd, Lars (Master thesis, 2009)
      The evolution of wind turbines are going towards floating offshore structures. To improve the stability of these turbines, the weight of the nacelle should be as low as possible. The company ChapDrive has developed a ...

    • Dimensioning of Kirne Power Plant in Nepal 

      Drange, Line Sjødin (Master thesis, 2009)
      Kirne Power Plant is a planned expansion of Khimti I Hydro Power Plant in Nepal. During the monsoon period there is a lot of excess water, and the the plan is to utilize this water in an extra power plant during the monsoon. ...

    • Improvement of response time and cutting capability of Blow Out Preventer (BOP) 

      Østby, Petter (Master thesis, 2008)
      There is a general demand in the market for BlowOut Preventers (BOP), which are capable of cutting tougher materials and cutting them faster than what is available today. This will give better safety and a more efficient ...

    • Improvement of response time and cutting capability of Blow Out Preventer (BOP) 

      Ostby, Petter (Master thesis, 2008)
      There is a general demand in the market for BlowOut Preventers (BOP), which are capable of cutting tougher materials and cutting them faster than what is available today. This will give better safety and a more efficient ...

    • Modelling of Adaptive Geometry Flow Control Solutions in CFD 

      Vea, Anne (Master thesis, 2012)
      A synthetic jet is a flow control device which injects a pulsating jet flow of high-momentum fluid into a boundary layer near the wall confining a main flow. The technique is used to prevent or delay boundary layer separation. ...

    • Morphing skins to improve local flow behavior in a hydroturbine context: Adaptive overflater for forbedring av lokal strømning i vannturbinsammenheng 

      Ekanger, Jarle Vikør (Master thesis, 2011)
      This thesis deals with the application of morphing skin and structure technology in a hydroturbine context. The work has been divided into two parts; construction of a demonstration rig and CFD calculations assessing the ...

    • Neddykket sentrifugalpumpe, design av sneglehus 

      Holmefjord, Eirik (Master thesis, 2008)
      SammendragOppgaven omhandler et nytt design av Framo lossepumpe SD 125. Dagens versjon av pumpen ble i prosjektoppgave høst 2007 vurdert med tanke på hydraulisk design. Der ble det og diskutert en alternativ metode for å ...

    • Numerisk analyse (CFD) av stempelpumpe 

      Nøttveit, Erlend (Master thesis, 2010)
      I denne oppgåva er det sett nærare på lekkasjar i stempelpumper. I starten presenterast den nødvendige teorien for CFD, pumper og spalter. Ein definerer deformasjons-lekkasje/trykk-lekkasje som eit forhold. Berekningar ...

    • Real Time Modelling of Flow Systems 

      Skodje, Sigrid Marie (Master thesis, 2013)
      Hydro power plants are operated in a different manner than what they used to be, due to increased focus on economy, and less on operating on best efficiency point. This creates new challenges related to wear and tear of ...

    • RP-200: Design of PD pump for pumping of molasses 

      Skåtun, Kim (Master thesis, 2008)
      Abstract Motivation There is, at the present time, no submerged molasses pump on the market that is designed specifically for cargo tankers. Due to this I, find it interesting to look into the possibilities of installing ...

    • Sediment Erosion in Francis Turbines 

      Eltvik, Mette (Master thesis, 2009)
      The high concentration of sediments in the rivers near the Andes and the Himmalayas, is a large problems for run-of-river power plants. Small particles of quartz, which is a hard and sharp mineral, damage the turbine and ...

    • Study of cavitation, pressure pulsations and flow control methods in hydro power plants 

      Vilberg, Ingrid Kristine (Doctoral theses at NTNU;2019:30, Doctoral thesis, 2019)
      Hydro power plants play an important role in balancing power supply and maintaining a constant grid frequency. With the large water storage capacity, hydro power is in a favourable position with regard to operational ...

    • Study of Hydrofoil Wakes Using PIV and CFD 

      Seim, Bjarte Grytli (Master thesis, 2009)
      In this master thesis the wake of a hydrofoil have been investigated using PIV. The main goal of this work have been to investigate how vortex generators can create mixing and smoothing of the velocity deficit in hydrofoil ...

    • Trykkpulsasjonsmålinger på høytrykkskraftverk 

      Solberg, Jo Magnus (Master thesis, 2008)
      Denne masteroppgaven er skrevet i forbindelse med et pågående doktorgradsarbeid der det blant annet skal gjøres trykkpulsasjonsmålinger på det eksisterende løpehjulet ved Tokke kraftverk. Hensikten med denne trykkpulsasj ...

    • Undersøkelse av ustasjonære og turbulente forhold i minirigg ved hjelp av LDV, trykkmålinger og CFD 

      Finstad, Pål Henrik Enger (Master thesis, 2009)
      Diplomoppgava fortsetter arbeidet som blei starta i prosjektoppgava høsten 2008. Det er utført laboratorieforsøk på en minirigg der spinn settes opp i et vertikalt rør. Nedstrøms kan vann injiseres tangentielt gjennom ei ...