Low-Order Modeling of Dynamic Stall on Airfoils in Incompressible Flow

Airfoil dynamic stall in incompressible flow is characterized by two interacting viscous phenomena: time-varying trailing-edge separation and the shedding of intermittent leading-edge-vortex structures. In current work, a physics based low-order method capable modeling interactions between phenomena developed with aim predicting only few empirical tuning parameters. Large computational datasets are used to understand unsteady airfoils so as augment an inviscid, airfoil theory model time-dependent effects. The resulting requires three coefficients for given Reynolds number, which could be obtained from single moderate-pitch-rate motion that airfoil/Reynolds number combination. Results shown compare excellently experimental solutions, terms both aerodynamic loads flow-pattern predictions. addition formulating limited dependencies, research provides valuable insights into their connection rapidly predictable theoretical