Wall-Modeled Large Eddy Simulations of F-16XL at High Angle of Attack скачать в хорошем качестве

Wall-Modeled Large Eddy Simulations of F-16XL at High Angle of Attack

High-alpha maneuvers which are commonplace in fighter aircraft are characterized by large regions of boundary-layer separation interacting with complex geometry induced vorticity - a flow regime where most legacy numerical models such as RANS fail. In the mid-1990s, the Cranked-Arrow Wing Aerodynamics Project (CAWAP) brought together flight, wind tunnel, and simulation data to understand the performance of the cranked-arrow wing design using the F-16XL aircraft. Originally conceived as the Supersonic Cruise and Maneuver Program (SCAMP), General Dynamics developed the F-16XL in collaboration with NASA Langley Research Center to enhance the capabilities of the already successful F-16. With the subsequent expansion of the program to include other NATO countries, a comprehensive CFD comparison study was conducted in 2007 which highlighted a specific low-Mach, high-alpha condition that seemed to be particularly challenging the the best CFD models of the time. Recently, Volcano ScaLES was used to conduct detailed WMLES investigations of this particular test case. The video shows isosurfaces of Q-criterion colored by streamwise velocity for a jet fighter (F-16XL). The simulation used 1.1 billion cells and is performed by Volcano ScaLES in a couple of days on a desktop computer containing just eight Nvidia A6000 GPUs.