Blar i Institutt for energi og prosessteknikk på forfatter "Bardal, Lars Morten"

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    • Aerodynamic Interaction between Two Speed Skaters Measured in a Closed Wind Tunnel 

      Elfmark, Ola; Bardal, Lars Morten; Oggiano, Luca; Myklebust, Håvard (Journal article, 2019)
      Team pursuit is a relatively new event in international long track speed skating. For a single speed skater the aerodynamic drag will account for up to 80% of the braking force, thus reducing the drag can greatly improve ...

    • Aerodynamic properties of textiles 

      Bardal, Lars Morten (Master thesis, 2010)
      The aerodynamic drag force acting on a circular cylinder clad with knitted wool and polyester textiles has been investigated in wind tunnel experiments in this study. Particle image velocimetry (PIV) was utilized to determine ...

    • An Empirical Model of Aerodynamic Drag in Alpine Skiing 

      Elfmark, Ola; Bardal, Lars Morten (Journal article; Peer reviewed, 2018)
      This paper describes an empirical model of aerodynamic drag for a range of body positions commonly used in alpine skiing. In order to calculate the drag coefficient (CD), a method for calculating the frontal area of an ...

    • Analysis of the Turbulence Intensity at Skipheia Measurement Station 

      Øistad, Ingunn Sletvold (Master thesis, 2015)
      Two years of data from the coastal measurement station at Skipheia in Norway have been analysed to characterise the atmospheric turbulence intensity (TI) in the wind. In addition to consider all data at 70 meters in one, ...

    • Influence of Fabric Structural Attributes on Their Aerodynamic Behavior 

      Bardal, Lars Morten; Oggiano, Luca (Journal article; Peer reviewed, 2013)
      The aerodynamic properties of 15 knitted fabrics of varying cover factor, yarn, and fiber compositions were investigated for their aerodynamic properties on circular cylinders in a wind tunnel. Measurements of the drag ...

    • Low Aerodynamic Drag Suit for Cycling - Design and Testing 

      Spurkland, Live Foyn (Master thesis, 2015)
      The focus on garment aerodynamics is increasing in high velocity sports where aerodynamics are crucial such as cycling, speed skating and alpine skiing. Recently published research show that a low drag suit manipulating ...

    • Power Performance Test on a Full-Scale Wind Turbine 

      Wangsness, Erik Brevik (Master thesis, 2014)
      There is a standard made by the International Electrotechnical Commission (IEC) for how a power performance test on a full-scale wind turbine should be performed. By using this standard as a guideline, I have performed a ...

    • The significant impact of ribs and small-scale roughness on cylinder drag crisis 

      Skeide, Arne Kilvik; Bardal, Lars Morten; Oggiano, Luca; Hearst, R. Jason (Peer reviewed; Journal article, 2020)
      The impact of flow-normal ribs and small-scale surface roughness on the drag and vortex shedding of a circular cylinder was investigated. Three rib heights, four relative rib spacings and three different forms of microroughness ...

    • Signifikant Reduksjon i Luftmotstanden på en Sylinder ved bruk av Striper og Tekstiler 

      Skeide, Arne Kilvik (Master thesis, 2019)
      Effekten av striper og små-skala overflateruhet på luftmotstanden og virvelavløsningen til en sirkulær sylinder, har blitt undersøkt. En sylinder ble dekket av et 'tekstil' bestående av halvsirkulære striper liggende ...

    • Vertical Wind Profiles in Non-Neutral Conditions: Comparison of Models and Measurements From Frøya 

      Domagalki, Piotr; Bardal, Lars Morten; Sætran, Lars Roar (Journal article; Peer reviewed, 2018)
      This paper presents an analysis of stratification dependent mean velocity profiles measured in a Norwegian coastal wind climate, and its comparison with models available in the literature. For this purpose we use 3 years ...