Slotted tunnel is found to be extremely effective in minimizing subsonic interference, porous-wall or perforated tunnel less effective; boundary interference in transonic tunnels near Mach number of unity is much smaller than suggested by subsonic linearzed theory; testing of models of small size relative to tunnel size is, therefore, possible near Mach number one.
Effectiveness of transonic wind-tunnel as device for minimizing tunnel-boundary interference for model tests at transonic speeds
AGARD -- Report
1959
67 pages
Report
Englisch
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