About
8
Publications
4,021
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
101
Citations
Introduction
Currently involved with numerical and experimental studies of passive flow controllers for mitigation of vortex induced vibrations.
Current institution
Additional affiliations
August 2017 - August 2020
Publications
Publications (8)
2D and 3D steady state simulations were done using the commercial CFD package Star-CCM+ with three different RANS turbulence models. Lift and drag coefficients were simulated at different angles of attack for the NREL S826 airfoil at a Reynolds number of 100 000, and compared to experimental data obtained at NTNU and at DTU. The Spalart-Allmaras an...
Lift, drag and surface pressure measurements are performed on a wing section of the NREL S826 wind turbine airfoil at eight Reynolds numbers ranging from Re=0.5x10^5 to 6.0x10^5. Alongside with the measurements two types of Reynolds averaged Navier–Stokes (RANS) simulations are performed, one of which includes a laminar to turbulent transition mode...
As part of an ongoing investigation into the mitigation of vortex induced vibrations of hydrofoils, a combined experimental and numerical study of the fluid-structure interactions and wake of a hydrofoil at lock-in has been conducted at the Waterpower laboratory of the Norwegian University of Science and Technology. The hydrofoil has a blunt traili...
A test of the v ² − f k − ϵ turbulence model for the flow around the Francis-99 hydrofoil geometry is conducted in order to assess it’s accuracy of trailing edge vortex shedding prediction. The model is based on the k − ϵ turbulence model, but needs no wall damping function, and also allows near-wall turbulence anisotropy. For reference, the model...
A set of experiments testing the effect on vortex induced vibrations from three different trailing edge designs on a generic hydrofoil has been carried out at the Waterpower Laboratory of NTNU. One of the designs, a Donaldson type semi-blunt trailing edge not a-typical for use in hydraulic machinery serves as a reference. The other two, a trailing...
Two-dimensional, two component particle image velocimetry (PIV) measurements of the guide-vane wake and vaneless space for a high head Francis model turbine are presented. Measurements have been carried out with a fixed head and rotational speed for a set of guide-vane openings representative of part load, high load and best efficiency operating po...
Control valves, nozzles and other mechanical flow constricting constructions often introduces highly turbulent flow downstream of vena contracta. When solid particles are present in the fluid stream erosion can occur due to the high fluid velocity and turbulence, both in the converging and diverging section of a constriction. This paper presents an...
