Computation of Transonic Steady and Unsteady Flow about the LANN Wing.

Abstract

This report summarizes the ECARP computations of the steady and unsteady transonic flow about the supercritical LANN wing. One mandatory and two optional test cases out of the AGARD windtunnel data sets for aeroelastic standard configurations were considered, ranging from modest to most severe flow conditions. The partners' unsteady inviscid flow solvers comprised two Transonic Small Perturbation (TSP), two Full-Potential (FP), and five advanced Euler methods, while in the viscous-inviscid interaction (VII) mode two unsteady TSP schemes and one steady FP method were available. Judging from the computed steady and unsteady inviscid pressure distributions and by the comparison of viscous-coupled solutions to the data, the results revealed the current specific sophistication of unsteady computational aerodynamics as well as the level reached for engineering applications.