Validation of computed high-lift flows with significant wind-tunnel effects

The modeling requirements for validating Navier-Stokes computations of a high-lift trapezoidal wing are investigated. This wing has a full-span slat and a full-span flap and has been tested extensively in the NASA Langley 14 x 22-ft Wind Tunnel and the NASA Ames 12-ft Pressure Wind Tunnel. Because of the size of the wing, there are significant facility effects in the data from the 12-ft wind tunnel. Computational models of the test facility of differing fidelity are developed and tested. Results are compared with experimental lift, drag, and surface pressures. In the computations a simplified, inviscid model of the test section performs as well as a high-fidelity, viscous test-section model. Computed results generally compare very well with experimental data at all but the highest angles of attack. A comparison of computational results from both free-air and wind-tunnel simulations at the same lift condition indicates that it is necessary to simulate the wind tunnel to perform validation using the 12-ft wind-tunnel experimental data

[1]  J. Benek,et al.  A 3-D Chimera Grid Embedding Technique , 1985 .

[2]  Dimitri J. Mavriplis,et al.  AIAA 99 – 0537 LARGE-SCALE PARALLEL UNSTRUCTURED MESH COMPUTATIONS FOR 3 D HIGH-LIFT ANALYSIS , 1999 .

[3]  Stuart E. Rogers,et al.  Numerical study of a trapezoidal wing high-lift configuration , 1999 .

[4]  T. Su,et al.  GRID GENERATION FOR COMPLEX HIGH-LIFT CONFIGURATIONS , 1998 .

[5]  P. Spalart.  A One-Equation Turbulence Model for Aerodynamic Flows , 1992 .

[6]  Thomas H. Pulliam,et al.  Recent enhancements to OVERFLOW , 1997 .

[7]  P. Johnson,et al.  Experimental investigation of a simplified 3D high lift configuration in support of CFD validation , 2000 .

[8]  Stuart E. Rogers,et al.  Navier-Stokes Analysis of a High Wing Transport High-Lift Configuration with Externally Blown Flaps , 2000 .

[9]  T. Su,et al.  Navier-Stokes analyses of a 747 high lift configuration , 1998 .

[10]  Stuart E. Rogers,et al.  Advances in overset CFD processes applied to subsonic high-lift aircraft , 2000 .

[11]  W. K. Anderson,et al.  Comparison of Finite Volume Flux Vector Splittings for the Euler Equations , 1985 .

[12]  Veer N. Vatsa,et al.  Navier-Stokes solutions for transonic flow over a wing mounted in a tunnel , 1988 .

[13]  Stuart E. Rogers,et al.  Navier-Stokes Analysis of the Flow About a Flap Edge , 1995 .

[14]  D. A. Johnson,et al.  Transonic airfoil calculations including wind tunnel wall-interference effects , 1986 .

[15]  W. L. Sickles,et al.  Transonic wind tunnel wall interference analysis for the Space Shuttle Launch Vehicle , 1993 .

[16]  Pieter G. Buning,et al.  Collar grids for intersecting geometric components within the Chimera overlapped grid scheme , 1991 .