Research data for a hydrokinetic turbine at high blockage ratio
Description
The research data comes from a study utilizing blade-resolved Large Eddy Simulation (LES) to analyze the wake characteristics of a horizontal-axis hydrokinetic turbine under a 35% blockage ratio. The numerical approach was validated using acoustic Doppler velocimetry (ADV) measurements obtained from a recirculating flume. By examining this data, the study aimed to: (i) assess the accuracy of LES in capturing the effects of high blockage on wake behavior by comparing simulated results with experimental measurements of mean flow and turbulence statistics. Both experimental and numerical data are contained here, so that any interested researcher may compute the validation of the ensemble-averaged velocity and resolved Reynolds stresses. (ii) identify the dominant mechanisms governing momentum transfer in both the bypass flow and wake region, as well as the role of lateral boundary proximity in the momentum balance equation terms. Numerical data contained here may be used to visualize the wake vortical flow structures via the Q criterion and analyze their influence in momentum recovery. Additionally, all the terms in the streamwise momentum balance equation can be computed to define how each contribute to the momentum recovery rate. Research data is divided into three directories. "README.txt" files are provided within each sub-directory and contain instructions on data details and how to open the files. Available directories are: "experimental" directory contains the velocity data collected with ADV Vectrino Profiler in the recirculating flume of the Universidad Nacional de Colombia - Hydraulics Laboratory. "CFD_BR35" contains the main Computational Fluid Dynamics (CFD) results obtained with OpenFoam for the validation case. Blockage ratio (BR) is the same that in the experimental facility: 35%. Simulation was carried out on the HiperGator super computer at the University of Florida. "OpenFOAM_case" contains the OpenFoam case with which the results in "CFD_BR35" were obtained. It is ready to run and contains all the necessary files. Simulation was tested in OpenFOAM v11 (The CFD model is developed by The OpenFOAM Foundation at https://openfoam.org/).
Files
Institutions
- University of Florida
- Universidad de Medellin