Improvements to the Actuator Line Modeling for Wind Turbines

A parabolic velocity-decomposition method for wind turbines

“…This Navier-Stokes solver has been verified and validated for wind turbine simulations including single and multiple turbines with sizes ranging from model scale to utility scale [36][37][38][39]. The blade-resolved simulations utilize a fine mesh spacing ( 2 + < y ) normal to the solid surfaces (blades and hub) to resolve the boundary layer.…”

A parabolic velocity-decomposition method for wind turbines

“…This Navier-Stokes solver has been verified and validated for wind turbine simulations including single and multiple turbines with sizes ranging from model scale to utility scale [36][37][38][39]. The blade-resolved simulations utilize a fine mesh spacing ( 2 + < y ) normal to the solid surfaces (blades and hub) to resolve the boundary layer.…”

An Advanced Actuator Line Method for Wind Energy Applications and Beyond

“…This method has similarities to that proposed by Mittal et al, 19 but its mathematical foundation and integration using g(x, y) as the weighting function is unique.…”

The Effect of Flow Sampling on the Robustness of the Actuator Line Method

“…In Mittal et al. [17], the sampling point is defined as the cell centre that is the nearest neighbour to the collocation point, and therefore, its location is mesh and rotor‐speed dependent. Extensions of the method aiming to improve the accuracy and theoretical background of the method include the derivation of a correction for the drag‐induced velocity [18], as well as a proposed viscous core correction for the underprediction of axial induction observed in ALM simulations with large $$$ \varepsilon /c $$$ values, where $$$ c $$$ is the local chord [13, 14].…”

“…Mittal et al. [17] observed large differences in turbine power and thrust coefficients, $$$ {C}_P $$$ and $$$ {C}_T $$$, when the interpolation scheme was varied. This sensitivity to the interpolation scheme is a direct result of the method only depending on a single point for the determination of the blade‐local velocity.…”

A parabolic velocity-decomposition method for wind turbines

“…This Navier-Stokes solver has been verified and validated for wind turbine simulations including single and multiple turbines with sizes ranging from model scale to utility scale [36][37][38][39]. The blade-resolved simulations utilize a fine mesh spacing ( 2 + < y ) normal to the solid surfaces (blades and hub) to resolve the boundary layer.…”

An Advanced Actuator Line Method for Wind Energy Applications and Beyond

“…This method has similarities to that proposed by Mittal et al, 19 but its mathematical foundation and integration using g(x, y) as the weighting function is unique.…”

The Effect of Flow Sampling on the Robustness of the Actuator Line Method

“…In Mittal et al. [17], the sampling point is defined as the cell centre that is the nearest neighbour to the collocation point, and therefore, its location is mesh and rotor‐speed dependent. Extensions of the method aiming to improve the accuracy and theoretical background of the method include the derivation of a correction for the drag‐induced velocity [18], as well as a proposed viscous core correction for the underprediction of axial induction observed in ALM simulations with large $$$ \varepsilon /c $$$ values, where $$$ c $$$ is the local chord [13, 14].…”

“…Mittal et al. [17] observed large differences in turbine power and thrust coefficients, $$$ {C}_P $$$ and $$$ {C}_T $$$, when the interpolation scheme was varied. This sensitivity to the interpolation scheme is a direct result of the method only depending on a single point for the determination of the blade‐local velocity.…”

A parabolic velocity-decomposition method for wind turbines

“…This Navier-Stokes solver has been verified and validated for wind turbine simulations including single and multiple turbines with sizes ranging from model scale to utility scale [36][37][38][39]. The blade-resolved simulations utilize a fine mesh spacing ( 2 + < y ) normal to the solid surfaces (blades and hub) to resolve the boundary layer.…”

An Advanced Actuator Line Method for Wind Energy Applications and Beyond

“…This method has similarities to that proposed by Mittal et al, 19 but its mathematical foundation and integration using g(x, y) as the weighting function is unique.…”

The Effect of Flow Sampling on the Robustness of the Actuator Line Method

“…In Mittal et al. [17], the sampling point is defined as the cell centre that is the nearest neighbour to the collocation point, and therefore, its location is mesh and rotor‐speed dependent. Extensions of the method aiming to improve the accuracy and theoretical background of the method include the derivation of a correction for the drag‐induced velocity [18], as well as a proposed viscous core correction for the underprediction of axial induction observed in ALM simulations with large $$$ \varepsilon /c $$$ values, where $$$ c $$$ is the local chord [13, 14].…”

“…Mittal et al. [17] observed large differences in turbine power and thrust coefficients, $$$ {C}_P $$$ and $$$ {C}_T $$$, when the interpolation scheme was varied. This sensitivity to the interpolation scheme is a direct result of the method only depending on a single point for the determination of the blade‐local velocity.…”