A method for modifying two-dimensional adaptive wind-tunnel walls including analytical and experimental verification
Joel L. Everhart, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Mathematics - 48 pages
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adaptive walls airfoil pressure distribution analytic angle of attack APPENDIX Boundary conditions boundary-layer displacement thickness calculated Calspan Cauchy integral formula chord chord-height ratio circular cylinder effective walls effective wind-tunnel wall evaluated Experimental Verification exterior factor of 0.25 FLEXWAL program four iterations free-air Goodyer incompressible incompressible flow infinity integrals in equations inviscid itera Iteration Figure Langley Research Center Laplace equation lifting and nonlifting lower walls method NACA 0012 airfoil NASA National Physical Laboratory presented in figure pressure data pressure orifices real and imaginary real flow Relaxation factor remove the interference Reynolds number root mean square shown in figure singularity solid flexible walls spline curve starting from straight straight walls streamline slope Streamlining Wind Tunnel streamwise technique test section theoretical tion transonic Mach number transonic wind tunnel tunnel walls Tunnel-empty two-dimensional undiverged walls upper and lower upstream and downstream V/STOL velocity components viscous wall corrections Wall Interference wall location