Computational Prediction of Forces and Moments for Transport Aircraft

Kidambi Sreenivas, Brent Mitchell, Shane Sawyer, Steve Karman, Stephen Nichols, and Daniel Hyams
UT SimCenter at Chattanooga, The University of Tennessee at Chattanooga, Chattanooga, Tennessee, 37403

A sequence of computations for the DLR-F6 wing-body configuration with and without the FX2B fairing was carried out using Tenasi, a node-centered, finite volume unstructured flow solver. All simulations were carried out at a Mach number of 0.75 and at two different Reynolds numbers (3x10⁶ and 5x10⁶). Significant sensitivity of the lift and drag coefficients to Reynolds number was observed. Lift, drag and moment coefficients along with pressure distributions were compared to experimental data for the DLR-F6 wing-body configuration (Re = 3x10⁶) and were in good agreement. A turbulence model as well as a grid refinement study was carried out for the DLR-F6 with FX2B fairing (Re = 5x10⁶). Lift, drag and moment coefficients are compared to other computations for the DLR-F6 with FX2B fairing.