ࡱ> .0-c jbjbSS (11 ] &~,~~~~  t[D~Running Xfoil on Athena ----------------------- Add code locker to your path: % add 16_d0006 This can be put in your .cshrc.mine file to avoid typing every session. Start Xfoil: % xfoilexec Or, start Xfoil with optional airfoil filename: % xfoilexec airfoil_file Typical XFOIL session keyboard inputs ------------------------------------- Notes: * Commands are shown in uppercase, but are not case-sensitive * Comments are shown in parentheses * Blank lines below are only for easier reading -- they are not Enter's! * A command with its argument(s) ommitted will result in an input prompt * A "?" command will always show the command menu at any Xfoil level LOAD airfoil_file (skip this if airfoil_file argument is given to xfoilexec) NACA 0010 (create NACA airfoil if airfoil_file is not used) OPER (enter OPER menu) ? (show full OPER menu; command below are from this menu) A 5 (specify alpha; can also type full command ALFA) ASEQ 0 8 2 (specify alpha sequence 0 2 4 6 8 ) CPV (make spiffy Cp vector plot of last point computed, 8 deg) CPX (make usual Cp(x) plot again) HARD (write current plot to PostScript file plot.ps; optional) CPWR filename (write Cp(x) distribution to file) P (turn on polar 1 accumulation toggle, can also type PACC) (decline writing to polar save file) (decline writing to polar dump file) ASEQ 0 14 1 (specify alpha sequence 0 1 2 ... 14) PLIS 1 (list polar 1 results on screen, optional) P (turn off polar 1 accumulation toggle) V 1e6 (turn on viscous toggle, with Reynolds No.; can also type VISC) A 5 (specify alpha) CL 0.4 (specify CL ; corresponding alpha is computed) P (turn on polar 2 accumulation toggle) (decline writing to polar save file) (decline writing to polar dump file) INIT (initialize boundary layers, since next alpha=0 is very different from last-computed alpha=5 ) ASEQ 0 10 0.2 (specify alpha sequence 0.0 0.2 0.4 ... 10 ) PP (plot stored polars 1 and 2; polar 1 is inviscid, 2 is viscous) ASEQ 10.2 15 0.2 (specify alpha sequence 10.2 10.4 ... 15 ; this extends polar 2) PP (plot stored polars again) HARD (write current plot to PostScript file plot.ps; optional) P (turn off polar 2 accumulation) PSUM (summary listing of stored polars) PWRT 1 (write polar 1 to a save file) filename_1 (give polar save filename) PWRT 2 (write polar 2 to a save file) filename_2 (give polar save filename) (go back to main Xfoil menu) QUIT (exit program) Note: If you ^C out of Xfoil rather than use QUIT, the Postscript file may not be terminated properly and may be unprintable. 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