Numerical investigation of h-Darrieus wind turbine aerodynamics at different tip speed ratios

Purpose The purpose of the paper is to predict aerodynamic performance a complete scale model H-Darrieus vertical axis wind turbine (VAWT) with end plates at different operating conditions. This aims understanding flow physics around VAWT for three tip speed ratios corresponding regimes. Design/methodology/approach study achieves first three-dimensional hybrid lattice Boltzmann method/very large eddy simulation (LBM-VLES) scaled and mast using solver PowerFLOW. power curve predicted from numerical simulations compared experimental data collected Erlangen University. highlights complexity turbulent features that are seen operational regimes instantaneous structures, mean velocity, pressure iso-contours, blade loading skin friction plots. Findings LBM-VLES approach setup provides good overall match curve, peak drop after point being captured. Variable structures over azimuthal revolution depends on ratio (TSR). Significant dynamic stall in upwind phase downwind rotation deep regime. Strong wake interactions inside rotor higher TSRs. Research limitations/implications computational cost time such high-fidelity remains expensive. Each requires week supercomputing facilities. Further studies need be performed improve analytical models inputs/calibration high fidelity databases. As future work, impact nonuniform inflow conditions more representative typical urban environment also needs investigated. Practical implications LBM methodology shown reliable prediction. Dynamic reduce VAWT. An ideal operation close should favored based local resource, as this exhibits smoother variation forces improving performance. 3D exhibit significant asymmetry could optimal layout clusters increase their density. present work importance including support mast. Social Accurate predictions Darrieus VAWTs help better siting turbines thus return investment reducing levelized energy. It promote development onsite electricity generation, especially industrial sites/urban areas renew interest farms. Originality/value A supporting has been data. analyzed turbine. These physical insights prediction capabilities useful commercial manufacturers.