Comprehensive Parametric Study of Blockage Effect on the Performance of Horizontal Axis Hydrokinetic Turbines

When a hydrokinetic turbine operates in confined flow, blockage effects are introduced, altering the flow at and downstream of rotor. Blockage have significant effect on loading performance turbines. As result, understanding them is critical for design prediction. The current study examines main interaction solidity (σ), tip speed ratio (TSR), (ε), pitch angle (θ) how influences (CP) three-bladed, untwisted, untapered horizontal axis turbine. investigation based validated 3D computational fluid dynamics (CFD), experiments (DOE), analysis variance (ANOVA) approaches. A total number 36 CFD models were developed meshed. 108 cases performed as part analysis. Results indicated that varying θ was only noticeable high TSR. Additionally, rate increment CP with respect to ε found proportional both TSR σ. power thrust coefficients affected most by σ, followed ε, TSR, then θ.