Aerodynamic loads estimation on a Twin Vertical-Tail configuration based on the Single-Step Lattice Boltzmann Method Simulation
In this work, an efficient CFD simulation of the turbulent flow produced in a generic deltawing model with a twin vertical-tail configuration is presented. The simulation is conducted at multiple high angles of attack to estimate the aerodynamic loads perceived by the twin verticaltails and produced by the breakdown of two Leading-Edge Extension (LEX) vortices. The simulation is carried out with an efficient CFD solver based on the Single-Step and Simplified Lattice Boltzmann Method (SSLBM), which is accelerated by using Graphics Processing Units (GPU) technology. The SSLBM solver is also coupled with an Immersed multi-domain discretization technique, to capture properly the boundary layer produced in the vicinity of the generic aircraft. Simulation results obtained with the SSLBM solver are compared with numerical results computed with the Stress-Blended Eddy Simulation (SBES) solver from the commercial software ANSYS Fluent, showing acceptable agreement. Furthermore, the computational performance comparison between the SSLBM solver vs. ANSYS Fluent solver is also presented, showing that the SSLBM is around 56 times faster compared to the SBES solver from ANSYS Fluent.
