Numerical and Experimental Investigation of H-Rotor Type Vertical Axis Wind Turbine: Part-I

Abstract

In this study numerical as well as experimental analysis of H-rotor type single-stage vertical axis wind turbine (VAWT) is done. Works done during the pre-processing, solver execution and post-processing stage is discussed initially. Different stages of numerical formula for fluid flow, conservation of mass and momentum is discussed and developed for the condition. Boundary type and boundary condition is discussed for various places of the system. Solver criteria and criteria for the convergence of the result is discussed. Analysis is done by considering the various factors of operational parameters, i.e. wind velocity, tip speed ratio (TSR), moment, power, power and torque coefficient, height of the blade, rotational velocity of the rotor etc. VAWTs dimensional parameter, CAD model, fluid enclosure domain, meshing of rotating domain and blade end regions, boundary conditions for flow, velocity-volume rendering results, velocities streamlines results, velocity contours, flow rotational vectors, velocity plots and Moment Results at the Solver Window are shown with various images and explained. CFD Results for Torque for Various Test Combinations, Summary of Outcomes of Various Parameters of Single Stage VAWT are shown in tabular form. Relation between Power with respect to the Velocity, Tip Speed and Rotor Diameter, interaction plot for power, Relation between Torque with respect to the Velocity, Tip Speed andRotor Diameter, etc like relationship and interactions are shown and explained in the paper. Values of results are compared for both the cases. This study will be completed with the study of multi-stage VAWT for the same H-rotor type wind turbine, blade profile, swept area, and wind speed. But, varying radius keeping same swept area for turbine and number of stages will be varying.