Blar i Bergen Open Research Archive på forfatter "Kral, Stephan Thomas"
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Atmospheric Drivers of Wind Turbine Blade Leading Edge Erosion: Review and Recommendations for Future Research
Pryor, Sara C.; Barthelmie, Rebecca Jane; Cadence, Jeremy; Dellwik, Ebba; Hasager, Charlotte Bay; Kral, Stephan Thomas; Reuder, Joachim; Rodgers, Marianne; Veraart, Marijn (Journal article; Peer reviewed, 2022)Leading edge erosion (LEE) of wind turbine blades causes decreased aerodynamic performance leading to lower power production and revenue and increased operations and maintenance costs. LEE is caused primarily by materials ... -
Flow Structure around a Multicopter Drone: A Computational Fluid Dynamics Analysis for Sensor Placement Considerations
Ghirardelli, Mauro; Kral, Stephan Thomas; Müller, Nicolas Carlo; Hann, Richard; Cheynet, Etienne; Reuder, Joachim (Journal article; Peer reviewed, 2023)This study presents a computational fluid dynamics (CFD) based approach to determine the optimal positioning for an atmospheric turbulence sensor on a rotary-wing uncrewed aerial vehicle (UAV) with X8 configuration. The ... -
The stable atmospheric boundary layer over snow-covered sea ice: Model evaluation with fine-scale ISOBAR18 observations
Lorenz, Torge; Mayer, Stephanie; Kral, Stephan Thomas; Suomi, Irene; Steeneveld, Gert Jan; Holtslag, Albert A.M. (Journal article; Peer reviewed, 2022)A realistic representation of the stable atmospheric boundary layer in numerical weather prediction (NWP) and climate models is still a challenge. We study the evolution of a stable boundary layer over snow-covered sea ice ... -
Unmanned Aircraft Get Together: The LAPSE-RATE Campaign
de Boer, Gijs; Diehl, Constantin; Jacob, Jamey; Houston, Adam; Smith, Suzanne W.; Chilson, Phillip; Schmale, David; Intrieri, Janet; Pinto, J; Elston, Jack; Brus, David; Kemppinen, Osku; Clark, A; Lawrence, D.; Bailey, Sean C.C.; Sama, Michael P.; Frazier, Amy; Crick, Christopher; Natalie, Victoria; Pillar-Little, Elizabeth A.; Klein, Petra; Waugh, Sean; Lundquist, Julie K.; Barbieri, Lindsay; Kral, Stephan Thomas; Jensen, A; Dixon, Cory; Borenstein, Steve; Hesselius, Daniel; Human, Kathleen; Hall, P; Argrow, Brian; Thornberry, T; Wright, R; Kelly, James T. (Journal article; Peer reviewed, 2020)Members of the international community developing unmanned aircraft for atmospheric research conducted a highly successful coordinated flight week in Colorado during the summer of 2018 to collect measurements, develop ...