DATABASE: Low Reynolds Response To Viscous Vortical Gusts
The response of a NACA0012 airfoil impacted by viscous vortical gusts at low Reynolds numbers is investigated by performing Direct Numerical Simulations of the two-dimensional incompressible flow. This database contains the time history of the aerodynamic force coefficients of the airfoil during the interaction with the vortical gust. The airfoil, set at a fixed angle of attack alpha, is impacted by a Taylor/Lamb-Oseen vortical gust, which are characterized by a diameter D, a intensity v0m, and a vertical separation h. Direct Numerical Simulations are run for a range of values for the angle of attack, the size and intensity of the vortical gust, and the vertical separations. All simulations are run at a fixed Reynolds number Re=1000, based on the airfoil chord c and the free-stream velocity Uinf.
More details about this database can be found in: Martínez-Muriel & Flores (2020) Analysis of Vortical Gust Impact on Airfoils at low Reynolds number, J. Fluids Struct. 99, 103138.
Contents
The database consist of a single ASCII file for each case. After a short, self-explanatory header, each file has 7 columns with the following data:
| time | t Uinf/c |
|---|---|
| lift coefficient | C_l |
| drag coefficient | C_d |
| coefficient of moments with respect to c/4 | C_m |
| perturbation of C_l with respect to steady state value | Delta C_l |
| perturbation of C_d with respect to steady state value | Delta C_d |
| perturbation of C_m with respect to steady state value | Delta C_m |
Nomenclature
| t: | Type of vortical gust. | T:Taylor, LO: Lamb-Oseen |
|---|---|---|
| a: | Angle of attack | alpha=[+8,0,-8] deg |
| γ: | Initial vertical position of the centre of the vortex | h/c= |
| d: | Diameter of the core of the vortex | D/c= |
| v: | Circumferential velocity | v0m/Uinf= |
IF YOU USE THIS DATABASE, PLEASE CITE US: Martínez-Muriel & Flores, J. Fluids Struct. 99, 103138 (2020).DOI: 10.1016/j.jfluidstructs.2020.103138