Time Accurate Simulations of High-Alpha Aerodynamics for Pitching Delta Wings

The primary objective of the study is to reproduce the dynamic formation, development and burst of the vortex that forms on the leeward side of a 70°-swept delta wing pitching in sinusoidal oscillations around its 40 % chord point. Emphasis is put on the prediction of the hysteresis loops that form in the aerodynamic loads history but the visualization of the unsteady flow around the wing is also introduced. The freestream Mach number for all the computations (both Euler and Navier-Stokes) is set to 0.2 while the mean angle of attack is changed between 12º, 22º and 38º for oscillations with a semi-amplitude varying between 3º and 18º. The moving grid approach implemented in the flow solver NSMB is used to reproduce the motion of the wing and the time-dependent flow equations are integrated with the dual timestepping method. In addition, a method for co-processing the simulation and the visualization of the flowfield is presented using flow feature extraction to reduce the amount of data saved in this large data storage requiring test case