NASA Technical Reports Server (NTRS) 20140008827: NASA Trapezoidal Wing Simulation Using Stress-w and One- and Two-Equation Turbulence Models

by: NASA Technical Reports Server (NTRS)

Publication date: 2014-01-13

Topics: NASA Technical Reports Server (NTRS), TRAPEZOIDAL WINGS, TURBULENCE MODELS, STRESS ANALYSIS, REYNOLDS STRESS, MATHEMATICAL MODELS, COMPUTATIONAL FLUID DYNAMICS, LARGE EDDY SIMULATION, SHEAR STRESS, ANGLE OF ATTACK, TRAILING EDGES, AIRFOILS, SEPARATED FLOW, Rodio, J. J., Xiao, X, Hassan, H. A., Rumsey, C. L.,

Collection: NASA_NTRS_Archive; additional_collections

Language: English

The Wilcox 2006 stress-omega model (also referred to as WilcoxRSM-w2006) has been implemented in the NASA Langley code CFL3D and used to study a variety of 2-D and 3-D configurations. It predicted a variety of basic cases reasonably well, including secondary flow in a supersonic rectangular duct. One- and two-equation turbulence models that employ the Boussinesq constitutive relation were unable to predict this secondary flow accurately because it is driven by normal turbulent stress differences. For the NASA trapezoidal wing at high angles of attack, the WilcoxRSM-w2006 model predicted lower maximum lift than experiment, similar to results of a two-equation model.