Actuator line model using simplified force calculation methods

Abstract. To simulate transient wind turbine wake interaction problems using limited data, two new variants of the actuator line technique are proposed in which rotor blade forces computed locally generic load data. The models, extensions disk force models by Navarro Diaz et al. (2019a) and Sørensen (2020), only demand thrust power coefficients tip speed ratio as input parameters. In paper analogy between model (ADM) (ALM) is shown, from this a simple methodology to implement local ALM without need for knowledge geometry airfoil data derived. Two simplified ALMs proposed, an analytical one based on (2020) numerical (2019a). compared ADM analogous well classical element theory, provides more detailed distributions evaluate calculation, analysis partial-wake case turbines carried out uniform laminar inflow turbulent neutral atmospheric boundary layer inflow. computations performed large eddy simulation facility Open Source Field Operation Manipulation (OpenFOAM), including Simulator Wind Farm Applications (SOWFA) libraries reference National Renewable Energy Laboratory (NREL) 5 MW test case. single-turbine case, normal tangential along showed very good agreement employed models. exhibited same distribution with minor differences due particular correction needed ALM. For challenging partially impacted both approaches manage correctly capture at different regions area, with, however, consistent overestimation outside underestimation inside wake. approach shows slightly better performance impact cases one. As expected, gave much prediction higher-frequency output fluctuations than ADM. These promising findings open possibility commercial farms inflows having get access actual most restricted confidentiality.